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  • 1
    Monographie ausleihbar
    Monographie ausleihbar
    London : H.M.S.O
    Signatur: AWI G10-18-91809
    Materialart: Monographie ausleihbar
    Seiten: 45 Seiten , Karte , 30 cm
    Ausgabe: 2nd ed
    ISBN: 0115917179 (pbk.)
    Sprache: Englisch
    Standort: AWI Lesesaal
    Zweigbibliothek: AWI Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Stuttgart : Schweizerbart
    Dazugehörige Bände
    Signatur: SR 90.0066(33)
    In: Geologisches Jahrbuch . Reihe A, Allgemeine und regionale Geologie Bundesrepublik Deutschland und Nachbargebiete, Tektonik, Stratigraphie, Paläontologie, 33
    Materialart: Schriftenreihen ausleihbar
    Seiten: 159 S. , Ill., graph. Darst., Kt. , 2 Beil.
    Serie: Geologisches Jahrbuch / A Heft 33
    Sprache: Deutsch , Englisch , Französisch , Russisch
    Anmerkung: Mit engl., franz. und russ. Zsfassungen
    Standort: Kompaktmagazin unten
    Zweigbibliothek: GFZ Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Signatur: ZSP-SCAR-570-16
    In: National Antarctic Research Report to SCAR, No. 16
    Materialart: Schriftenreihen ausleihbar
    Seiten: 99 Seiten , Illustrationen
    ISSN: 0179-0072
    Serie: National Antarctic Research Report to SCAR 16
    Sprache: Englisch
    Anmerkung: CONTENTS: I. National Committee for Antarctic Research, and National Operating Body. - II. Map of Stations. - Ill. Permanent Observatories, Regular Observations and Long-term Monitoring. - IV. Report on Highlights of Science Activities from Previous Reporting Period (1 Oct. 93 - 31 March 94). - A. Biology. - B. Geodesy & Geographic Information. - C. Geology. - D. Solid Earth Geophysics. - E. Glaciology. - F. Human Biology & Medicine. - G. Atmospheric Sciences. - H. Logistics. - I. Ocean Physical Sciences (incl. Marine Chemistry). - V. List of Permits and Rationale for Entry into SPAs and SSSIs. - VI. Prospectus of Planned Activities for Coming Reporting Period (1 April 94 - 31 March 95). - A. Biology. - B. Geodesy & Geographic Information. - C. Geology. - D. Solid Earth Geophysics. - E. Glaciology. - F. Human Biology & Medicine. - G. Atmospheric Sciences. - H. Logistics. - I. Ocean Physical Sciences (incl. Marine Chemistry). - VII. Future Activities Planned & Funded (beyond 31 March 95). - A. Biology. - B. Geodesy & Geographic Information. - C. Geology. - D. Solid Earth Geophysics. - E. Glaciology. - F. Human Biology & Medicine. - G. Atmospheric Sciences. - H. Logistics. - I. Ocean Physical Sciences (incl. Marine Chemistry). - VIII. Bibliography. - IX. List of Principal Investigators and Responsible Authorities.
    Standort: AWI Archiv
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  • 4
    Monographie ausleihbar
    Monographie ausleihbar
    [Erscheinungsort nicht ermittelbar] : [Verlag nicht ermittelbar]
    Signatur: AWI P4-19-92238
    Materialart: Monographie ausleihbar
    Seiten: 16 Seiten , Illustrationen
    Sprache: Englisch
    Standort: AWI Lesesaal
    Zweigbibliothek: AWI Bibliothek
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  • 5
    Signatur: ZSP-201-93/11
    In: CRREL Report, 93-11
    Beschreibung / Inhaltsverzeichnis: A laboratory study of the behavior of snow under shock wave loading and unloading conditions was conducted using a 200-mm-diameter gas gun to generate loading waves in snow samples with initial densities of 100 to 520 kg m-3 at temperatures of -2 to -23 deg C. Stress levels were 2 to 40 MPa. The response of snow to shock wave loading was measured as a function of distance from the impact plane using embedded stress gauges. Large impedance differences between snow and the stress gauges produced complex stress histories. A finite element model, along with a simple analytical model of the experiment, was used to interpret the stress histories. Snow deformation was not affected by initial temperature, but was found to be rate dependent. The initial density of the snow determined its pressure-deformation path. The pressure needed to compact snow to a specific final density increases with decreasing initial density. The release moduli increased nonlinearly from 50 MPa at a snow pressure of about 15 MPa to 2700 MPa at a snow pressure of about 40 MPa.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 150 Seiten , Illustrationen
    Serie: CRREL Report 93-11
    Sprache: Englisch
    Anmerkung: CONTENTS Preface Introduction Experimental equipment and methods Gas gun Snow target assembly Data acquisition Experimental procedure Measured data Stress histories Snow characterization Data analysis Recommendations Experimental methods Experimental needs Summary Literature cited Appendix A : Stress-time data plots Appendix B: Tabulated stress-time data Abstract
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  • 6
    Signatur: ZSP-SCAR-570-14
    In: National Antarctic Research Report to SCAR, No. 14
    Materialart: Schriftenreihen ausleihbar
    Seiten: 133 Seiten , Illustrationen
    ISSN: 0179-0072
    Serie: National Antarctic Research Report to SCAR 14
    Sprache: Englisch
    Anmerkung: CONTENTS: I. National Committee for Antarctic Research, and National Operating Body. - II. Map of Stations. - Ill. Permanent Observatories, Regular Observations and Long-term Monitoring. - IV. Report on Highlights of Science Activities from Previous Reporting Period (1 Oct. 91 - 31 March 92). - A. Biology. - B. Geodesy & Geographic Information. - C. Geology. - D. Solid Earth Geophysics. - E. Glaciology. - F. Human Biology & Medicine. - G. Atmospheric Sciences. - H. Logistics. - I. Ocean Physical Sciences (incl. Marine Chemistry). - V. List of Permits and Rationale for Entry into SPAs and SSSIs. - VI. Prospectus of Planned Activities for Coming Reporting Period (1 April 92 - 31 March 93). - A. Biology. - B. Geodesy & Geographic Information. - C. Geology. - D. Solid Earth Geophysics. - E. Glaciology. - F. Human Biology & Medicine. - G. Atmospheric Sciences. - H. Logistics. - I. Ocean Physical Sciences (incl. Marine Chemistry). - VII. Future Activities Planned & Funded (beyond 31 March 93). - A. Biology. - B. Geodesy & Geographic Information. - C. Geology. - D. Solid Earth Geophysics. - E. Glaciology. - F. Human Biology & Medicine. - G. Atmospheric Sciences. - H. Logistics. - I. Ocean Physical Sciences (incl. Marine Chemistry). - VIII. Bibliography. - IX. List of Principal Investigators and Responsible Authorities.
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  • 7
    Signatur: ZSP-SCAR-570-1
    In: Report to SCAR on Antarctic research activities of Germany (FRG), 1
    Materialart: Schriftenreihen ausleihbar
    Seiten: 21 Seiten
    ISSN: 0179-0072
    Serie: Report to SCAR on Antarctic research activities of Germany (FRG) 1
    Sprache: Englisch
    Anmerkung: Contents: Membership of the National Committee on Antarctic Research of the Federal Republic of Germany. - Introduction. - Station. - Field Activities 1974-1979. - Planned Activities 1979/80. - References.
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  • 8
    Signatur: ZSP-201-76/33
    In: CRREL Report, 76-33
    In: Detecting structural heat losses with mobile infrared thermography / R.H. Munis, S.J. Marshall and M.A. Bush, Part IV
    Beschreibung / Inhaltsverzeichnis: During the winter of 1973-74 a mobile infrared thermography system was used to survey campus buildings at Dartmouth College, Hanover, New Hampshire. Both qualitative and quantitative data are presented regarding heat flow through a small area of a wall of one brick dormitory building before and after installation of aluminum reflectors between radiators and the wall. These data were used to estimate annual cost savings for 22 buildings of similar construction having aluminum reflectors installed behind 1100 radiators. The data were then compared with the actual savings which were calculated from condensate meter data. The discrepancy between estimated and actual annual cost savings is explained in detail along with all assumptions required for these calculations.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 14 Seiten , Illustrationen
    Serie: CRREL Report 76-33
    Sprache: Englisch
    Standort: AWI Archiv
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  • 9
    Monographie ausleihbar
    Monographie ausleihbar
    Bonn : Federal Ministery for Research and Technology
    Signatur: AWI A1-19-92588
    Materialart: Monographie ausleihbar
    Seiten: 51 Seiten , Illustrationen
    ISBN: 3881352376
    Sprache: Englisch
    Anmerkung: Contents Preface Introduction The Earth as a global system Basic building blocks Introduction The atmosphere The hydrosphere The cryosphere The geosphere The biosphere Global cycles Introduction The water cycle Bio-geochemical cycles Natural changes Introduction Crucial changes on characteristic time scales The development of civilization and its consequences for the Earth system Signals from a disturbed environment Introduction The changed environment Problems caused by a growing world population The world of tomorrow Introduction Climate models and their limits Living in a greenhouse searching for traces and solutions The sciences being challenged Introduction Guidelines for a program of research into global changes Science and politics take up the challenge: International and national research programs Introduction International efforts Global Change research in Germany Acronyms and Abbreviations Bibliography: Illustrations
    Standort: AWI Lesesaal
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  • 10
    Monographie ausleihbar
    Monographie ausleihbar
    Stroudsburg : Dowden, Hutchinson & Ross
    Dazugehörige Bände
    Signatur: G 8115
    In: Benchmark papers in geology
    Materialart: Monographie ausleihbar
    Seiten: XV, 468 Seiten , Illustrationen
    ISBN: 0-471-13540-2
    Serie: Benchmark papers in geology 15
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 11
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-79/13
    In: CRREL Report, 79-13
    Beschreibung / Inhaltsverzeichnis: Heat transfer in turbulent flow was measured in a rectangular channel with a width of 0.254 m and a flow depth of 0.0254 m. Correlations between the Nusselt and Reynolds numbers are given for a range of 3020 Re 22360. A Prandtl number range of 9.90 or = Pr or = 12.28 for water was used in the tests. The results are compared with those of other investigations and show that some well-known correlations underpredict the heat transfer by about 35%.
    Materialart: Schriftenreihen ausleihbar
    Seiten: ii, 5 Seiten , Illustrationen
    Serie: CRREL Report 79-13
    Sprache: Englisch
    Standort: AWI Archiv
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  • 12
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-79/10
    In: CRREL Report, 79-10
    Beschreibung / Inhaltsverzeichnis: Ice cores from Byrd Station and Little America V have been used to test an ultrasonic technique for evaluating crystal anisotropy in the Antarctic Ice Sheet. P-wave velocities measured parallel and perpendicular to the vertical axes of cores from the 2164-m-thick ice sheet at Byrd Station have yielded results in excellent agreement with the observed c-axis fabric profile and with the in-situ P-wave velocity profile measured parallel to the bore hole axis. Velocity differences in excess of 140 m/s for core samples from deeper than 1300 m attest to the strong single pole clustering of crystallographic c-axes about the vertical, especially in the zone from 1300-1800 m. Such oriented structure is compatible only with strong horizontal shearing in this zone. The existence in an ice sheet of widespread shearing several hundred meters above its bed raises serious questions as to the validity of current concepts of the flow of large ice masses that tend to gloss over or ignore crystal alignments of this magnitude.
    Materialart: Schriftenreihen ausleihbar
    Seiten: IV, 16 Seiten , Illustrationen
    Serie: CRREL Report 79-10
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Laboratory measurements Sample sources Ultrasonic velocity measurements Effects of inclined drilling at Byrd Station Results Byrd Station Little America V Summary and conclusions Literature cited
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  • 13
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-91/5
    In: CRREL Report, 91-5
    Beschreibung / Inhaltsverzeichnis: An analysis of the National Science Foundation's surface vehicle fleet in Antarctica is reported on here. Surface vehicle needs have been determined through interviews of vehicle users, managers and maintainers, and from direct on-site observation. An ideal grouping of vehicle categories is proposed that will address current needs and provide flexibility for the future. Ultimately, recommendations for streamlining and modernizing the NSF Antarctic vehicle fleet are made. Cargo transportation over snow was identified as being in a crisis state. Personnel movement functions for all but traversing are performed adequately at this time, although there is much room for improvement. Brands and models must be selected for some categories of recommended vehicle types. This will naturally follow a more in-depth analysis of candidates and discussions with NSF vehicle managers. A purchasing plan, including a time table, budget, and desired sequence of replacement, must then be formulated and executed.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 71 Seiten , Illustrationen
    Serie: CRREL Report 91-5
    Sprache: Englisch
    Anmerkung: CONTENTS Preface Executive summary Introduction Regional divisions Zone A - rock and ice roads Zone B - local ice Zone C - traverse Zone D - ice edge Zone E - remote field site Zone F - inland station Current transportation needs in Antarctica Future transportation needs Transportation analysis Personnel transport Cargo transport Summary of analysis Recommendations for changes to U.S. vehicle fleet Conclusions and summary of findings Literature cited Appendix A: Age distribution of NSF surface vehicles Abstract
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  • 14
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-91/15
    In: CRREL Report, 91-15
    Beschreibung / Inhaltsverzeichnis: An overview is presented of recent activities and results in the use of commercially available short-pulse UHF radar for surveying ice conditions on freshwater bodies. Improvements in radar systems have made it possible to increase ice thickness resolution by as much as one third relative to that in past attempts, and some new signal processing approaches shown here may offer an order of magnitude improvement. Results from airborne surveying are shown in which the varieties of ice character are reflected. Given the lack of ground coupling, one can rely upon a reasonably well-defined wavelet structure for enhanced signal processing and interpretation possibilities. An algorithm is presented that locates returns from interfaces in the presence of noise for a non-minimum delay wavelet. The method performs a simple inversion in the frequency domain, enhanced by a time dependent weight designed to recognize the shape of the wavelet amplitude and phase spectra. Thin ice layers are resolved down to a few centimeters and are distinguished from an ice free condition by means of a matched filter system designed to recognize the interference pattern from parallel interfaces close to one another. The effects and constraints imposed by water layers on wet ice are discussed, as are general attenuation, sloping bottom, and critical angle effects in deeper water. In closing, observations on the problems and prospects of this sort of surveying are offered.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 31 Seiten , Illustrationen
    Serie: CRREL Report 91-15
    Sprache: Englisch
    Anmerkung: Contents Preface Nomenclature Introduction Field surveys Methods and paraphernalia Results Sloping bottom effects and critical angle phenomena Deconvolution and thin layers Well-separated echoes Thin ice layers Thin layers of water Observations Literature cited Abstract
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  • 15
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-78/11
    In: CRREL Report, 78-11
    In: Mechanics of cutting and boring, Part VIII
    Beschreibung / Inhaltsverzeichnis: The report deals with forces and power requirements for cutting machines of the belt type, as exemplified by large chain saws and ladder trenchers. The forces of single cutting tools are considered, and related to the overall forces on a cutter bar. Forces are related to power, and sources of loss are identified. Tractive thrust and normal reaction are analyzed and used to assess the traction, weight and balance.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 24 Seiten , Illustrationen
    Serie: CRREL Report 78-11
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Foreword Introduction Terminology Tool forces Number of active cutting teeth Tool force and chain force Chain power Tool turce and belt power Tractive thrust and normal reaction Traction of carrier vehicles Power/weight ratio Cutter bar moments Specific energy Performance index Power density Apparent belt pressure Acceleratin and transport of cuttings Examples
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  • 16
    Signatur: ZSP-201-76/24
    In: CRREL Report, 76-24
    Beschreibung / Inhaltsverzeichnis: Chemical analysis of surface snows and deeper ice core samples from Milcent, Greenland, indicates a marine origin for Na and Cl and a terrestrial origin for Al, Mn and V. Pre-1900 enrichment factors, based on average crustal composition, are high for Zn and Hg and appear to be related to their volatility. A comparison of pre-1900 and 1971-1973 concentrations of V and Hg shows no decided increase from industrial production; however, the abundance of Zn (relative to Al) increased three-fold during this time period. The chemical composition of ancient ice is extremely useful in interpreting modern aerosols.
    Materialart: Schriftenreihen ausleihbar
    Seiten: ii, 6 Seiten , Illustrationen
    Serie: CRREL Report 76-24
    Sprache: Englisch
    Standort: AWI Archiv
    Zweigbibliothek: AWI Bibliothek
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  • 17
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-76/25
    In: CRREL Report, 76-25
    Beschreibung / Inhaltsverzeichnis: The primary objective of this investigation was to compile baseline information pertaining to the ocean circulation, especially the extent and patterns of tidal currents and tidal flushing, in Cook Inlet, Alaska, utilizing aircraft and satellite imagery with corroborative ground truth data. LANDSAT-1 and NOAA-2 and -3 imagery provided repetitive, synoptic views of surface currents, water mass migration and sediment distribution during different seasons and tides. Color, color infrared and thermal infrared imagery acquired on 22 July 1972 with the NASA NP-3A aircraft were used to analyze currents, mixing patterns and sediment dispersion in selected areas. Temperature(C), salinity (0/00) and suspended sediment concentration (mg/l) data and hand-held photography were utilized as ground truth information in the interpretation of the aircraft and satellite imagery. Coriolis effect, semidiurnal tides and the Alaska current govern the estuary circulation. Clear, oceanic water enters the inlet on the southeast during flood tide, progresses northward along the east shore with minor lateral mixing, and remains a distinct water mass to the latitude of Kasilof-Ninilchik. South of the forelands, mixing with turbid inlet water becomes extensive. Turbid water moves south primarily along the north shore during ebb tide and a shear zone between the two water masses forms in mid-inlet south of Kalgin Island. Currents adjacent to and north of the forelands are complicated by tidal action, coastal configuration and bottom effects. Turbulence is greatest throughout the water column along the south shore and stratification is more pronounced in Kamishak and Kachemak Bays, especially when fresh water runoff is high.
    Materialart: Schriftenreihen ausleihbar
    Seiten: ix, 92 Seiten , Illustrationen
    Serie: CRREL Report 76-25
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Summary Conversion factors: U.S. customary to metric (SI) units of measurement. Introduction Background Objectives Project history Approach Aircraft imagery LANDSAT-1 imagery NOAA-2 and -3 satellite imagery Ground truth data Imagery and ground truth data analysis Physical and cultural setting Geography Geology Climate Hydrology Local industry and population density Sources of estuarine pollution Results and discussion Coastal configuration Bathymetry Tides Asymmetry of tidal flow/duration across inlet Suspended sediment distribution and circulation Sea ice Tidal flushing characteristics Summary and conclusions Applications Recommendations Literature cited Appendix A. RS-14 infrared scanner imagery
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  • 18
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-76/28
    In: CRREL Report, 76-28
    Beschreibung / Inhaltsverzeichnis: Fourier transforms of selected ground-motion time histories from five underground high-explosive and nuclear detonations are used to define the transmission properties (Transfer functions) of three rock types. Absorption, a measure of a rock's energy dissipating characteristics, is expressed for each of the tests as a function of the frequency of transmission. Dispersion results from a variation in transmission velocity with frequency and is described for each test by a phase velocity spectrum. The transmission properties from one of the sites are used to predict a ground-motion time history at that site from another nuclear event. The potential use of Fourier techniques to make ground-motion predictions and to measure in-situ material properties is discussed.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 91 Seiten , Illustrationen
    Serie: CRREL Report 76-28
    Sprache: Englisch
    Anmerkung: Contents Section I: Introduction Section II: Analytical procedures 1. Fourier transforms 2. Basic transform properties 3. Transform techniques 4. The transfer function Section II: Parameter studies and program evaluations 1. Analytical parameter study 2. I-TRAIN evaluation 3. S-TRAIN evaluation Section IV: Data 1. DATEX I 2. DATEX II 3. STARMET 4. MINERAL LODE 5. HARD HAT and PILEDRIVER Section V: Analysis of transformed data 1. Absorption 2. Dispersion 3. Transfer function Section VI: Fourier synthesis Section VII: Discussion Literature cited Appendix A: The Fourier integral and series Appendix B: Subroutine FOURT used in analysis Appendix C: I-TRAIN and S-TRAIN programs
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  • 19
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-76/32
    In: CRREL Report, 76-31
    Beschreibung / Inhaltsverzeichnis: Four large grounded multi-year shear ridge formations were found in the grounded ice subzone of the fast ice zone near the Harrison Bay/Prudhoe Bay area of Alaska. A 166-m-long cross section of one of these formations was obtained by leveling and sonar measurements. These measurements revealed that the maximum ridge height was 12.6 m and that the formation was grounded in 17-18 m of water. The salinity, temperature, brine volume and density of the ice were determined on samples obtained by coring. The physical characteristics of the formations as observed in satellite, SLAR and aerial imagery indicate that these formations have not moved between the time of their formation in the fall of 1974 and August of 1976. Evidence of significant aeolian debris discoloring the ice is discussed.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 27 Seiten , Illustrationen
    Serie: CRREL Report 76-32
    Sprache: Englisch
    Anmerkung: Contents Abstract Preface Introduction Background Fast ice study area Results and discussion Literature cited
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  • 20
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    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-76/31
    In: CRREL Report, 76-31
    Beschreibung / Inhaltsverzeichnis: Sections in the Connecticut River where ice jam potential is high were identified through the use of low-altitude black and white photographs taken during low-flow, ice-free conditions. The hydraulics and mechanics of ice jam initiation were investigated in the river reach where these sections were identified. Certain areas were found in the river that had a high susceptibility to ice clogging, but this high potential decreased with increasing discharge because of the improved surface conveyance of the ice through the reach. The stability of ice floes was established along the channel, but the floes generally became unstable as the flow increased. This was calculated by using a Froude number criterion. Grounding locations for ice became evident when the critical Froude number was zero for a given thickness and water depth. No single factor was determined to be responsible for initiating the ice jams in the Connecticut River at Windsor. Apparently there existed a multitude of interacting conditions: surface constrictions, possible high backwater conditions from the Brattleboro Dam, a solid ice cover in the backwater of the Brattleboro Dam that prevented ice transport from the Windsor area, deep pools followed by shallow depth sections upstream of bridge piers, a greater ice thickness accumulation of fragmented floes than would result if a uniform cover could be established in the same reach, and the diurnal fluctuation of river stage casued by the release of water at Wilder Dam.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 39 Seiten , Illustrationen
    Serie: CRREL Report 76-31
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Summary Conversion factors: U.S. customary to metric units of measurement Introduction Testsite Aerial photography Channel morphology — Interpretation of aerial photographs Ground surveys Hydraulic analysis Analysis of ice jam locations Winter field observations Conclusions Literature cited Appendix: Locations and plots of cross sections from Sumner Falls to Chase Island, Connecticut River
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  • 21
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-76/41
    In: CRREL Report, 76-41
    Beschreibung / Inhaltsverzeichnis: Eight Geoceiver stations were established and suitably marked along or near the crestiline of the Greenland ice sheet during GISP field operations from 1971 to 1975. At one of these stations, DYE-3, repeated Geoceiver positions indicate an ice velocity of 12.7 m.yr on an azimuth of approximately 60 degrees. Data from the International Greenland Glaciological Expedition (EGIG) surveys show that ice flow in the vicinity of Crete is radiating outward from a dome to the south. Two independent calculations of the state of equilibrium at Crete indicate ice sheet thinning rates of 0.25 to 0.37 m/yr, while direct measurement of elevation change by EGIG indicates an ice sheet thickening rate of difference of 0.06 m/yr. Resolution of these differences must await further geophysical work and deep drilling in the ice sheet.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 13 Seiten , Illustrationen
    Serie: CRREL Report 76-41
    Sprache: Englisch
    Standort: AWI Archiv
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  • 22
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-76/43
    In: CRREL Report, 76-43
    Beschreibung / Inhaltsverzeichnis: Ice fog generated at the Eielson AFB power plant cooling pond contributes heavily to the total ice fog problem on the base. Several methods for ice fog suppression were studied and two techniques were tested experimentally. Experiments were also conducted to determine the magnitude of the various modes of heat transfer within the pond's microclimate. Values of evaporative and radiative heat loss during ice fog are presented. Ice cover is shown to be an effective ice fog suppression technique. Monomolecular films are also shown to be effective and offer some unique advantages, such as ease of application and low overall cost. The heat normally lost to evaporation must be dissipated by other means during suppression. With the ice cover technique this is accomplished by melting the ice cover. During suppression with monomolecular films, the heat must be dissipated by increasing radiative and convective losses. The simplicity of application of monomolecular films, along with their lower cost, combine to make this technique attractive; however, the lower pond temperatures and increased suppression effectiveness weigh heavily in favor of the ice-cover technique.
    Materialart: Schriftenreihen ausleihbar
    Seiten: viii, 86 Seiten , Illustrationen
    Serie: CRREL Report 76-43
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface List of symbols Conversion factors: U.S. customary to metric units of measurement Introduction Section I. Ice fog Section II. Evaporation Bowen's equation Evaporation equation Evaporation measurements during ice fog conditions Evaporation measurements at Eielson Power Plant cooling pond Data analysis Section Ill. Radiation during ice fog Brunt's equation Ångström equation Elsasser's equation Cloud cover Reflection Field experimental results Analysis of experimental results Radiation equations for ice fog Transmissivity of ice fog Radiation model Wind effect Summary Section IV. Convection Convective heat transfer theory Rotem and Claassen equation Kay's approach Russian approach Analysis Heat budget at the surface Conclusions Section V. Ice fog suppression techniques Fans Injection wells Latent heat storage Monomolecular films Use of heated water from the cooling pond Section VI. Latent heat storage experiments Freezing rates Cooling pond Ice building Ice growth rate -maximum system limitation Evaporation heat loss -maximum Realistic growth rate Ice building techniques Ice volume measurements Melting experiments Ice fog suppression considerations Experimental results Section VII. Recommendations and conclusions Hexadecanol studies Injection well suppression Latent heat storage suppression Comparison of approaches Measurements of evaporation Measurements of radiation loss Convective heat losses Ice fog suppression Selected bibliography Appendix A. Convective heat transfer coefficient from water to ice and from ice to air
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  • 23
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-77/3
    In: CRREL Report, 77-3
    Beschreibung / Inhaltsverzeichnis: Tests were conducted in uniaxial compression and tension to determine the effect of temperature on the strength of frozen Fairbanks silt. Test temperatures ranged from 0 C to -56.7 C. Two machine speeds, 4.23 cm/sec and 0.0423 cm/sec, were used for the constant displacement rate tests. From the highest to the lowest temperature, the compressive strength increased up to about one order of magnitude and the tensile strength increased one-half an order of magnitude. Equations are presented which correlate strength with temperature at the strain rates obtained. The initial tangent and 50% strength moduli and the specific energy are given for each test. The mode of fracture and the effects of unfrozen water content and ice matrix strengthening are discussed, and the test results are compared with the data of other investigations.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 27 Seiten , Illustrationen
    Serie: CRREL Report 77-3
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Sample preparation Apparatus and testing procedure Test results Discussion Compressive strength Tensile strength Initial tangent and 50% stress moduli Specific energy Mode of failure Strength as a function of unfrozen water Thermal activation Conclusions and recommendations Literature cited
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  • 24
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-77/6
    In: CRREL Report, 77-6
    Beschreibung / Inhaltsverzeichnis: It has been reported that small arms projectiles are inherently unstable in snow and that snow has an unexpectedly high ability to stop them and other fast-moving projectiles. Field tests showed that the typical subarctic snow of interior Alaska can be used effectively to provide protection from both rifle and machine gun fire. The undisturbed snow had an average density of 0.18 g/cu. cm., but simple processing, such as shoveling, increased the density to around 0.34 g/cu. cm. Further processing increased the density to above o.40 g/cm3 but densities much above that value were difficult to obtain with simple hand equipment. Tests of the M16 rifle and M60 and M2HB machine guns showed that bullet penetration was inversely related to density - the higher the density the lower the bullet penetration. Design values for the three weapons were determined. A number of types of snow trenches and structures were designed and tested. They were found to provide good protection, in part since bullets showed a strong tendency to ricochet from the snow surface when striking it at a low angle. Burlap bags were filled with snow to revet structures and worked very well. Several types of Russian defensive works of snow were tested but proved unsuitable in the light, weak subarctic snow. The times required for troops to build several types of structures using only shovels and scoops were recorded.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 23 Seiten , Illustrationen
    Serie: CRREL Report 77-6
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Summary Background Objectives Subarctic snow General Snow processing Construction productivity Shovel capacity Snow piles Bullet behavior and penetration in snow Test procedure M16 M60 ball M60 tracers .50 caliber Tumbling Bullet deformation and breakage Design penetration values Defensive works of snow Revetments Snow bags The snow trench The hardened snow trench Breastworks and bunkers Evaluation of foreign technology Russian expedient snow trenches Snow blocks and block structures The snow arch An expedient shelter Conclusions Recommendations Literature cited
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  • 25
    Monographie ausleihbar
    Monographie ausleihbar
    New York [u.a.] : McGraw-Hill Book Company
    Signatur: MOP 44210 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: XV, 523 Seiten , graphische Darstellungen
    ISBN: 978-0-070-56042-0
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
    Zweigbibliothek: GFZ Bibliothek
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  • 26
    Monographie ausleihbar
    Monographie ausleihbar
    [Rockville] : National Oceanic and Atmospheric Administration [u.a]
    Signatur: MOP 47484 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: Loseblatt-Ausgabe , Illustrationen
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
    Zweigbibliothek: GFZ Bibliothek
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  • 27
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-76/34
    In: CRREL Report, 76-34
    Beschreibung / Inhaltsverzeichnis: Some physical characteristics of two grounded floebergs (fragments of multi-year pressure ridges) near Prudhoe Bay, Alaska, are described. Cross-sectional profiles of the sails and keels of both floebergs were obtained. A sail to keel ratio of 1 to 3.38 obtained with one floeberg was found to be in good agreement with previous investigations. A survey of the sea floor for evidence of scoring induced during grounding yielded a maximum depth of gouging of 1.1m. Additional studies included investigations of the internal structure of the floebergs, and a brief examination of the organic and sedimentary debris found entrained within the floebergs. The grounding of ice on the continental shelves of the Arctic is of considerable interest to those concerned with the development and impact of development of these continental shelves. The field study reported here provides information useful in assessing the nature and characteristics of interactions between floebergs and the sea bed on which they are grounded.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 13 Seiten , Illustrationen
    Serie: CRREL Report 76-34
    Sprache: Englisch
    Standort: AWI Archiv
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  • 28
    Signatur: ZSP-201-76/35
    In: CRREL Report, 76-35
    Beschreibung / Inhaltsverzeichnis: Crystalline textures and fabrics of ice cores from the 2164-m-thick ice sheet at Byrd Station, Antarctica, reveal the existence of an anisotropic ice sheet. A gradual but persistent increase in the c-axis preferred orientation of the ice crystals was observed between the surface and 1200m. This progressive growth of an oriented crystal fabric is accompanied by a 20-fold increase in crystal sized between 56 and 600m, followed by virtually no change in crystal size between 6000 and 1200m. A broad vertical clustering of c-axes develops by 1200m. Between 1200 and 1300 m the structure transforms into a fine-grained mosaic of crystals with their basal glide planes now oriented substantially within the horizontal. This highly oriented fine-grained structure, which persists to 1800m, is compatible only with a strong horizontal shear deformation in this part of the ice sheet. Rapid transformation from single- to multiple-maximum fabrics occurs below 1800m. This transformation, accompanied by the growth of very large crystals, is attributed to the overriding effect of relatively high temperatures in the bottom layers of old ice at Byrd Station rather than to a significant decrease in stress. The zone of single-maximum fabrics between 1200 and 1800 m also contains numerous layers of volcanic dust. Fabrics of the very fine-grained ice associated with these dust bands indicate the bands are actively associated with shearing in the ice sheet. Some slipping of ice along the bedrock seems likely at Byrd Station, since the basal ice is at the pressure melting point and liquid water is known to exist at the ice/rock interface.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 30 Seiten , Illustrationen
    Serie: CRREL Report 76-35
    Sprache: Englisch
    Standort: AWI Archiv
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  • 29
    Signatur: PIK M 490-19-93048
    Materialart: Monographie ausleihbar
    Seiten: XIII, 577 S , Illustrationen, Diagramme
    Serie: Physica 191,1-4
    Sprache: Englisch
    Standort: A 18 - Bitte bestellen
    Zweigbibliothek: PIK Bibliothek
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  • 30
    Signatur: MOP 44439 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: 68 Seiten
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
    Zweigbibliothek: GFZ Bibliothek
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  • 31
    Monographie ausleihbar
    Monographie ausleihbar
    [Erscheinungsort nicht ermittelbar] : [Verlag nicht ermittelbar]
    Signatur: MOP 44941 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: 24 Seiten
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
    Zweigbibliothek: GFZ Bibliothek
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  • 32
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-79/29
    In: CRREL Report, 79-29
    Beschreibung / Inhaltsverzeichnis: An analytical study of the propagation of shock waves in snow was carried out to evaluate the response of medium density snow to high rates of loading. One solution was developed for steady shock waves; this resulted in calculation of pressure jump, density jump and stress wave speed. Correlation with available experimental data was found to be good. Nonsteady shock waves were also considered in order to evaluate wave attenuation rates in snow. Very few data were available to compare with the analytical results, so no definite conclusions on the part of the study could be made. The results show, however, that shock waves that produce plastic deformation attenuate at extremely high rates and that differences in pressure between two waves are quickly eliminated within a short distance. Calculations were also made to evaluate the effect of wave frequency on attenuation rates. The results show that, for plastic waves, frequency is not a predominant factor for determining attenuation rates.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 14 Seiten , Illustrationen
    Serie: CRREL Report 79-29
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Nomenclature I. Introduction II. A constitutive law for snow and balance principles III. Compatibility laws and jump equations for stress waves IV. Steady shock waves in snow V. Comparison of steady-wave theory with experimental results VI. A numerical solution to the nonsteady wave problem VII. Jump equations for nonsteady shock waves VIII. Reduced jump equations Discussion and conclusions Literature cited
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  • 33
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-79/28
    In: CRREL Report, 79-28
    Beschreibung / Inhaltsverzeichnis: Transmission and scanning electron micrographs of Umiat bentonite revealed thin, mica-like grains with irregular shapes. Most of the bentonite showed electron diffraction ring patterns, but some showed hexagonal net patterns as well as ring patterns. The lengths of the unit cells were calculated to be 5.18 A along the a-axis and 8.97 A along the b-axis. Semiquantitative analyses were made using an energy dispersive spectrometer. Common elements such as Si, Ti, Al, Fe, Mg, Na and K were determined. The molecular ratio of SiO2:Al2O3 was calculated to be 492:100 for the bulk sample, indicating that Umiat bentonite is similar in most respects to Wyoming bentonite, and is classified as a mont-morillonite. The microstructure of frozen Umiat bentonite was observed at a specimen temperature of -100 C using a scanning electron microscope equipped with a cold stage. Frozen bentonite and segregated ice patterns formed from wet bentonite were examined using an X-ray map and Si X-ray line scan. Sublimation processes of ice in the frozen bentonite were observed at specimen temperatures of -60 and -80 C. After sublimation of the ice the bentonite displayed a honeycomb structure. It was concluded that the freezing-sublimation cycle in frozen soil increases the permeability of water vapor due to the three-dimensional structure of the coagulated clay formed by freezing.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 14 Seiten , Illustrationen
    Serie: CRREL Report 79-28
    Sprache: Englisch
    Standort: AWI Archiv
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  • 34
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-79/25
    In: CRREL Report, 79-25
    In: Charged dislocation in ice, I.
    Beschreibung / Inhaltsverzeichnis: The motion of dislocations in single crystal ice under an electric field was observed by using X-ray topographic methods. Electric charge density on these dislocations was deduced from the amplitude and length of the dislocation segment under the known AC electrical field. The most likely linear charge density was about +5x10^-11 c/m, although considerable variation is possible depending on the effective field acting on the dislocation lines.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 12 Seiten , Illustrationen
    Serie: CRREL Report 79-25
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Theory Experimental apparatus and procedure Results Discussion Concluding remarks Selected bibliography Appendix A. Mosotti type field on core of cylindrical cavity
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  • 35
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-79/24
    In: CRREL Report, 79-24
    Beschreibung / Inhaltsverzeichnis: By using a new thermocoring technique, a hole was successfully drilled through the 416-m thickness of the Ross Ice Shelf at J-9 Camp. This report provides a description of the drill and an account of this drilling project. A provisional examination of the core shows the ice shelf to consist of 410 m of snow and glacial ice underlain by 6 m of sea ice formed by direct freezing of sea water to the bottom of the Ross Ice Shelf.
    Materialart: Schriftenreihen ausleihbar
    Seiten: ii, 12 Seiten , Illustrationen
    Serie: CRREL Report 79-24
    Sprache: Englisch
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  • 36
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-79/23
    In: CRREL Report, 79-23
    Beschreibung / Inhaltsverzeichnis: The performance of surface impedance and magnetic induction electromagnetic subsurface exploration techniques was studied seasonally at various sites in Alaska where permafrost and massive ground ice occurred. The surface impedance method, which uses radiowaves in the LF and VLF bands, and the magnetic induction method, which uses low-frequency magnetic induction fields, distinguish subsurface materials by the electrical resistivity of the materials. The methods used have greatest sensitivity within about 20 m of the surface and are, therefore, most applicable for shallow subsurface investigations. The selection of study sites was based on anticipated contrasts in electrical resistivity between ground ice and adjacent earth materials. A magnetic induction instrument, using a separation of 3.66-m between the transmitter and receiver antennas, in general was able to detect near-surface zones of massive ice and to provide data regarding permafrost distribution in both the Fairbanks and Prudhoe Bay areas. At this antenna separation, the depth of magnetic field penetration was sufficient to include mainly the zone containing maximum contrasts in resistivity between ground ice and other earth materials. In the Fairbanks area, contrasts, in this zone were greatest in late winter when the seasonally thawed surface layer was completely frozen. When thawed, this layer usually becomes more conductive and often masks the deeper resistivity contrasts. In the Prudhoe Bay area, maximum ground resistivity contrasts were detected in late summer when shallow subsurface temperatures had risen sufficiently to permit resistivity contrasts between the massive ice and the ice-rich ground to appear.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 24 Seiten , Illustrationen
    Serie: CRREL Report 79-23
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Background Obiectives and procedures Ground electrical resistivity in permafrost regions Electromagnetic techniques General Magnetic induction method Surface impedance fradiowave method Direct current method General description of field sites Results Site 1 CRREL permafrost station, Fairbanks, Alaska Site 2 Planned road cut for Steese Highway near Fox, Alaska Site 3 Relic floodplain near Fairbanks, Alaska Site 4 Pingos, Prudhoe Bay, Alaska Site 5 Ice wedges, Prudhoe Bay, Alaska Comparisons between the surface impedance and magnetic induction methods Conclusions and recommendations Literature cited Appendix A. Discussion of the depth of sensitivity of the magnetic induction method using two- and three-layer apparent resistivity curves
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  • 37
    Signatur: MOP 46654 / Mitte
    In: World weather program : plan for fiscal year, 1980 and 1981
    Materialart: Schriftenreihen ausleihbar
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
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  • 38
    Monographie ausleihbar
    Monographie ausleihbar
    Praha : Český Hydrometeorologický Ústav
    Signatur: MOP 42912 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: Getr. Zählung
    ISBN: 80-900206-4-X
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
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  • 39
    Monographie ausleihbar
    Monographie ausleihbar
    Grenoble : IAGA Symposium
    Signatur: MOP 42980 / Mitte
    Materialart: Monographie ausleihbar
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
    Zweigbibliothek: GFZ Bibliothek
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  • 40
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Pasay City, Philippines : Typhoon Committee Secretariat
    Dazugehörige Bände
    Signatur: MOP 46950(1991) / Mitte
    In: ESCAP/WMO Typhoon Committee annual review, 1991
    Materialart: Schriftenreihen ausleihbar
    Serie: ESCAP/WMO Typhoon Committee annual review 1991
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
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  • 41
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-79/27
    In: CRREL Report, 79-27
    Beschreibung / Inhaltsverzeichnis: Some Bessel function identities found by solving problems of the deflection of a floating ice plate by two different methods are rigorously proved. The master formulas from which all the identities are derived are in a Fourier reciprocal relationship, connecting a Hankel function to an exponential function. Many new formulas can be derived from the master formulas. The analytical method presented here now opens the way to study a hitherto impossible type of problem--the deflection of floating elastic plates of various shapes and boundary conditions.
    Materialart: Schriftenreihen ausleihbar
    Seiten: ii, 13 Seiten , Illustrationen
    Serie: CRREL Report 79-27
    Sprache: Englisch
    Standort: AWI Archiv
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  • 42
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-79/26
    In: CRREL Report, 79-26
    Beschreibung / Inhaltsverzeichnis: A 19-year record of the annual closing and opening dates of operation of the Lake Champlain ferry at Grand Isle, Vermont, which are controlled by the lake's ice cover, was made available to CRREL. These navigation records accurately approximated the freeze-over and breakup dates for the ferry crossing area between Gordon Landing, Vermont, and Cumberland Head, New York. When compared statistically with water temperature and climatological data for the same years at nearby Lake Champlain locations, the dates allowed accurate predictions of ice formation. From nearby air temperature records, cumulative freezing degree-day (deg C) curves were plotted for each year of record, and ice formation dates and standard deviations were predicted with considerable accuracy. Several methods of predicting ice formation on Lake Champlain were attempted. The most accurate approach used a combination of water temperatures and freezing degree-days. The influence of wind speed on ice cover formation and prediction are also discussed in the report.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 21 Seiten , Illustrationen
    Serie: CRREL Report 79-26
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Data tabulation and collection Air temperatures 11-reezing degree-days Water temperatures Closing and opening dates Results Air temperature Freezing degree-days Water temperatures Analysis: Attempted methods of predicting ice formation Predicting air temperatures 8Summer water temperatures Fall water temperatures and freezing degree-days Wind speed influence on closing of the lake Water temperature vs surface air temperature analysis Prediction of ice-out dates Conclusions Literature cited Appendix A. Freezing degree-day curves with ice notations and watertemperature notations Appendix B. Summary
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  • 43
    Monographie ausleihbar
    Monographie ausleihbar
    New York [u.a.] : Plenum Press
    Signatur: 9790
    Materialart: Monographie ausleihbar
    Seiten: XV, 508 Seiten , Illustrationen
    ISBN: 0306307391
    Sprache: Englisch
    Standort: Kompaktmagazin oben
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  • 44
    Signatur: MOP 44044 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: vi, 126 Seiten , Illustrationen , 28 cm
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
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  • 45
    Signatur: AWI G4-22-94968
    Materialart: Monographie ausleihbar
    Seiten: x, 532 Seiten , Illustrationen , 23 cm
    ISBN: 0-662-18742-3
    Serie: NHRI symposium No. 6
    Sprache: Englisch
    Anmerkung: TABLE OF CONTENTS FOREWORD PREFACE INTRODUCTION SECTION 1: GENERAL PAPERS Case Study of a Grounded Jam; Restigouche River, New Brunswick / by S. Beltaos and B.C. Burrell Water Balance and Geochemistry Studies in a Tundra Watershed, District of Keewatin, Northwest Territories / by G.G. Bursey, T.W.D. Edwards and S.K. Frape River Icing Mounds: a Winter Water Source on the Eastern North Slope of Alaska / by E.F. Chacho, C.M. Collins, A.J. Delaney and S.A. Arcone Geochemical Evolution of Water in a Continental High Boreal Wetland Basin: Preliminary Results / by D. Craig A Physical Model of Ice Overthn.ist during the Break-Up of Intact River-Ice Covers / by M.N. Demuth and T.D. Prowse Seasonal Changes in the Hydrochemistry of Land Drainage: Colour Lake Catchment, Axel Heiberg Island, N.W.T. / by M. English, S. Schiff, M. Ecclestone, W.P. Adams, M. Hinton, L. Pezzutto, R. Elgood, C. Allan and D. Pierson Shape, Length and Flow· Conditions of Conduits at South Cascade Glacier, Washington State, U.S.A. / by A.G. Fountain CO2-Rich Ground Waters of the Flat River Valley, N.W.T. / by S.M. Hamilton, F.A. Michel and C.W. Jefferson Regional Snow Ablation in the Alaskan Arctic / by L.D. Hinzman, D.L. Kane and R.E. Giec Regionalization of Low Flows in Yukon Territory / by J.R. Janowicz Discharge Regimes of a Glacierized Basin, Slims River, Yukon / by P.G. Johnson Pulses in Glacier Discharge: Indicators of the Internal Drainage System of Glaciers / by P.G. Johnson Drainage of an Ice-Dammed Lake, Kaskawulsh Glacier Basin, Yukon / by J.N. Kasper and P.G. Johnson On Areal Distribution. of Snowcover in a Mountainous Area / by A. Killingtveit and K. Sand Hydrogeochemical Aspects of Two Selected Sites in a Fringe Zone of Discontinuous Permafrost / by Y.T.J. Kwong, D. Craig and M. Griffin Ice-Cover Growth and Freeze-Out of Solutes in a Mackenzie Delta Lake / by L.F.W. Lesack, P. Marsh and R.E. Hecky Hydrological Processes in a Small Catchment Containing a Perennial Snowbank, Melville Island, N.W.T. / by A.G. Lewkowicz and K.L. Young On Modelling Surface Meltwater Discharge from Arctic and Alpine Glaciers / by D.S. Munro A High Arctic Occurrence of Seasonal Frost Mounds / by W.H. Pollard Relationships between Snow Chemistry and Blowing Snow: Initial Findings / by J.W. Pomeroy, T.D. Davies and M. Tranter Peatlands of the Lake Melville Coastal Plain, Labrador / by J.S. Price, D.A. Maloney and F.G. Downey Constraints on the Origin of Acidity in Colour Lake, Axel Heiberg Island (79°25'N) / by S. Schiff, M. English, M. Ecclestone, R. Elgood, M. Hinton and L. Pezzutto Longitudinal Dispersion in the Ice-Covered Athabasca River / by G. Van Der Vinne and D. Andres Economic Impact of River Ice Jams in Canada / by G. Van Der Vinne, T.D. Prowse and D. Andres Estimation of Mass-Balance and Run-Off Component of Urumqi Glacier No. I from Water-Balance Analysis / by Z. Yang SECTION 2: MODELLING Interactive Modelling of Cold Regions Watersheds with SSARR / by E.A. Cassell and T. Pangburn Estimates of Evaporation in the Yukon and Northwest Territories / by J. Haas A Basin Water-Storage Model to Forecast Columbia River Discharge / by W. Tangborn Preliminary Findings from Experiments on Frazil and Anchor Ice in a Circular Flume / by G. Tsang and B. Trapp On Computer Simulation of Ice Motion in Rivers / by O.G. Vinogradov, A. Springer and P. Wierzba SECTION 3: OTHER CONTRIBUTIONS Transformation of Heavy Metals under Tidal Flows in the Severnaya Dvina Estuary / by V.F. Brekhovskikh, A.N. Malutin and M.A. Mordasov Northern River: BOD-DO Model / by V.F. Brekhovskikh and G.V. Volpian Water Storage in Alpine Glaciers (Abstract) / by M.M. Brugman Snowmelt Infiltration into Frozen Soil at Sites in the Discontinuous Permafrost Zone Near Mayo, Yukon Territory / by C.R. Bum Use of Periphyton Indices as a Biological Measure of Water Quality in Small Rivers / by E.A. Goncharevich Yukon and Northwest Territories Ground-Water Data Base / by P. Hardisty, V. Schilder, T. Dabrowski and J. Wells Some Aspects of Glacier Hydrology in China / by X. Hu and Z. Yang Modelled Estimates of Changes in the Water Balance of Forested Northern River Basins / by Yu.G. Motovilov and N.A. Nazarov Study of Surface Water Quality in the Northern Region Subject to Pollution / by A.N. Shammasov Response of Riverine and Lacustrine Biocenoses to Human Impact / by N.S. Zolotareva and M.A. Mordasov APPENDIX A: LIST OF PARTICIPANTS
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  • 46
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Boulder, Colo. : The Geological Society of America
    Dazugehörige Bände
    Signatur: S 90.0006(174)
    In: Memoir / The Geological Society of America, 174
    Materialart: Schriftenreihen ausleihbar
    Seiten: XI, 414 Seiten , Illustrationen, graphische Darstellungen, Karten
    ISBN: 0-8137-1174-6
    Serie: Memoir / The Geological Society of America 174
    Sprache: Englisch
    Standort: Kompaktmagazin unten
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  • 47
    Monographie ausleihbar
    Monographie ausleihbar
    Washington, DC : Mineralogical Society of America
    Signatur: MR 22.94990
    Materialart: Monographie ausleihbar
    Seiten: XII, 545 Seiten , Illustrationen, graphische Darstellungen
    Ausgabe: 2. printing with minor revisions
    ISBN: 0-03-085155-6
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 48
    Signatur: 10.1144/GSL.SP.1990.053.01.23 (e-book)
    In: Special publications / the Geological Society, London, No. 53
    Beschreibung / Inhaltsverzeichnis: This volume examines the processes responsible for sedimentation in modern glacimarine environments, and how such modern studies can be used as analogues in the interpretation of ancient glacimarine sequences. Sediments released from glaciers grounded in tidewater, floating ice shelves, ice tongues, icebergs and sea ice form complex sequences governed by glaciological, oceanographic, sedimentary and biogenic controls. Ten per cent of the world’s oceans and epicontinental seas contain such active glacimarine environments, but during Cenozoic glacial periods this area was doubled. This book will, therefore, be of relevance to all scientists concerned with high and middle latitude marine environments. The early chapters are concerned largely with processes of sedimentation in modern glacimarine environments; examples are drawn from Alaska, the Canadian Arctic, Svalbard and Antarctica. Studies of ancient sequences, both Cenzoic and pre-Cenozoic, from the Barents Sea, Greenland, Sweden, Alaska and the northwest European continental shelf, form the latter part of the book.
    Materialart: 12
    Seiten: 1 Online-Ressource (VII, 423 Seiten) , Illustrationen
    Ausgabe: First published
    ISBN: 0-903317-54-0
    Serie: Special publications / the Geological Society, London 53
    Sprache: Englisch
    Anmerkung: Contents Julian A. Dowdeswell and James D. Scourse: Preface --- Julian A. Dowdeswell and James D. Scourse: On the description and modelling of glacimarine sediments and sedimentation / Geological Society, London, Special Publications, 53:1-13, doi:10.1144/GSL.SP.1990.053.01.01 --- G. S. Boulton: Sedimentary and sea level changes during glacial cycles and their control on glacimarine facies architecture / Geological Society, London, Special Publications, 53:15-52, doi:10.1144/GSL.SP.1990.053.01.02 --- Ross D. Powell: Glacimarine processes at grounding-line fans and their growth to ice-contact deltas / Geological Society, London, Special Publications, 53:53-73, doi:10.1144/GSL.SP.1990.053.01.03 --- Ellen A. Cowan and Ross D. Powell: Suspended sediment transport and deposition of cyclically interlaminated sediment in a temperate glacial fjord, Alaska, U.S.A. / Geological Society, London, Special Publications, 53:75-89, doi:10.1144/GSL.SP.1990.053.01.04 --- Eugene W. Domack: Laminated terrigenous sediments from the Antarctic Peninsula: the role of subglacial and marine processes / Geological Society, London, Special Publications, 53:91-103, doi:10.1144/GSL.SP.1990.053.01.05 --- Robert Gilbert: Rafting in glacimarine environments / Geological Society, London, Special Publications, 53:105-120, doi:10.1144/GSL.SP.1990.053.01.06 --- Julian A. Dowdeswell and Tavi Murray: Modelling rates of sedimentation from icebergs / Geological Society, London, Special Publications, 53:121-137, doi:10.1144/GSL.SP.1990.053.01.07 --- Paul R. Carlson, Terry R. Bruns, and Michael A. Fisher: Development of slope valleys in the glacimarine environment of a complex subduction zone, Northern Gulf of Alaska / Geological Society, London, Special Publications, 53:139-153, doi:10.1144/GSL.SP.1990.053.01.08 --- Alec E. Aitken: Fossilization potential of Arctic fjord and continental shelf benthic macrofaunas / Geological Society, London, Special Publications, 53:155-176, doi:10.1144/GSL.SP.1990.053.01.09 --- James P. M. Syvitski, K. William G. LeBlanc, and R. E. Cranston: The flux and preservation of organic carbon in Baffin Island fjords / Geological Society, London, Special Publications, 53:177-199, doi:10.1144/GSL.SP.1990.053.01.10 --- Ian J. Fairchild and Baruch Spiro: Carbonate minerals in glacial sediments: geochemical clues to palaeoenvironment / Geological Society, London, Special Publications, 53:201-216, doi:10.1144/GSL.SP.1990.053.01.11 --- C. M. T. Woodworth-Lynas and J. Y. Guigné: Iceberg scours in the geological record: examples from glacial Lake Agassiz / Geological Society, London, Special Publications, 53:217-233, doi:10.1144/GSL.SP.1990.053.01.12 --- Jens Bischof, Joachim Koch, Michaela Kubisch, Robert F. Spielhagen, and Jörn Thiede: Nordic Seas surface ice drift reconstructions: evidence from ice rafted coal fragments during oxygen isotope stage 6 / Geological Society, London, Special Publications, 53:235-251, doi:10.1144/GSL.SP.1990.053.01.13 --- Anders Solheim, Lars Russwurm, Anders Elverhøi, and Mona Nyland Berg: Glacial geomorphic features in the northern Barents Sea: direct evidence for grounded ice and implications for the pattern of deglaciation and late glacial sedimentation / Geological Society, London, Special Publications, 53:253-268, doi:10.1144/GSL.SP.1990.053.01.14 --- Tore O. Vorren, Erland Lebesbye, and Kjell B. Larsen: Geometry and genesis of the glacigenic sediments in the southern Barents Sea / Geological Society, London, Special Publications, 53:269-288, doi:10.1144/GSL.SP.1990.053.01.15 --- D. Huddart and J. D. Peacock: Early Holocene morainal bank sedimentology and marine ecology, Skjoldungebrae gorge, North Scoresby Land, East Greenland / Geological Society, London, Special Publications, 53:289-305, doi:10.1144/GSL.SP.1990.053.01.16 --- Rodney L. Stevens: Proximal and distal glacimarine deposits in southwestern Sweden: contrasts in sedimentation / Geological Society, London, Special Publications, 53:307-316, doi:10.1144/GSL.SP.1990.053.01.17 --- A. R. Lord: The Pleistocene—Holocene transition in Southwestern Sweden and the recognition of deglaciation effects in adjacent seas / Geological Society, London, Special Publications, 53:317-328, doi:10.1144/GSL.SP.1990.053.01.18 --- J. D. Scourse, W. E. N. Austin, R. M. Bateman, J. A. Catt, C. D. R. Evans, J. E. Robinson, and J. R. Young: Sedimentology and micropalaeontology of glacimarine sediments from the Central and Southwestern Celtic Sea / Geological Society, London, Special Publications, 53:329-347, doi:10.1144/GSL.SP.1990.053.01.19 --- M. S. Stoker: Glacially-influenced sedimentation on the Hebridean slope, northwestern United Kingdom continental margin / Geological Society, London, Special Publications, 53:349-362, doi:10.1144/GSL.SP.1990.053.01.20 --- Carolyn H. Eyles and Martin B. Lagoe: Sedimentation patterns and facies geometries on a temperate glacially-influenced continental shelf: the Yakataga Formation, Middleton Island, Alaska / Geological Society, London, Special Publications, 53:363-386, doi:10.1144/GSL.SP.1990.053.01.21 --- A. C. M. Moncrieff and M. J. Hambrey: Marginal-marine glacial sedimentation in the late Precambrian succession of East Greenland / Geological Society, London, Special Publications, 53:387-410, doi:10.1144/GSL.SP.1990.053.01.22
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  • 49
    Signatur: AWI G3-22-94975
    Materialart: Schriftenreihen ausleihbar
    Seiten: XIII, 263 Seiten , Illustrationen , 1 Karte
    Ausgabe: First edition 1983, reprinted edition 1993
    Serie: Guidebook / Division of Geological & Geophysical Surveys, Department of Natural Resources, State of Alaska 1
    Sprache: Englisch
    Anmerkung: Kartenbeilage unter dem Titel: Physiographic map and field trip localities of the Upper Cook Inlet area, Alaska / compiled by R. D. Reger and R. G. Updike (1982) , CONTENTS Introduction General statement Organization and acknowledgments Selected references Middle Tanana River valley R&sum& of the permafrost and Quaternary geology Road log and locality descriptions Selected references Delta River area. Alaska Range R&sum& of the permafrost and Quaternary geology Road log and locality description Trans-Alaska Pipeline System Thawing problems Construction modes Conventional burial Special burial Conventional elevated and anchor support Selected references Copper River basin Rèsumè of Quaternary geology Road log and locality description Gakona section Richardson Highway Simpson Hill roadcut Copper River Bluff section Glenn Highway Selected references Overview of the Matanuska Glacier Selected references Upper Cook Inlet region and the Matanuska Valley Introduction Physiography and geology Upper Cook Inlet region Matanuska Valley Climate Vegetation. Soils Rèsumè of Quaternary geology General statement Late Pliocene-early Pleistocene glaciations and interglaciations Mt. Susitna Glaciation Mt. Susitna-Caribou Hills interglaciation Caribou Hills Glaciation Late Pleistocene glaciations and interglaciations Caribou Hills-Eklutna interglaciation Eklutna Glaciation Eklutna-Knik interglaciation Knik Glaciation Knik-Naptowne nonglacial interval Naptowne Glaciation Early Holocene Glaciations Middle to Late Holocene events Alaskan Glaciation Tustumena advances Tunnel advances Other events Road log and locality descriptions Selected references Appendix A - Radiocarbon dates related to late Quaternary events in the Upper Cook Inlet region, Alaska
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  • 50
    Signatur: MR 22.94995
    Materialart: Monographie ausleihbar
    Seiten: 195 Seiten , Illustrationen, graphische Darstellungen, Karten
    Ausgabe: First edition
    ISBN: 7-116-01128-5
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 51
    Signatur: AWI G5-23-95000
    Materialart: Monographie ausleihbar
    Seiten: xii, 169 Seiten , Illustrationen
    Sprache: Englisch
    Anmerkung: Masterarbeit, Queen's University (Kingston, Ont.), 1990 , TABLE OF CONTENTS ABSTRACT ACKOWLEDGEMENTS LIST OF FIGURES LIST OF TABLES CHAPTER 1: INTRODUCTION 1.1 Purpose of Study 1.2 Site Description 1.2.1 Climate 1.2.2 Geology 1.2.3 Late Cenozoic Evolution of the Queen Elizabeth Islands 1.2.4 Origin of Colour Lake 1.2.5 Lake and Basin Morphometry and Morphology CHAPTER 2: LITERATURE REVIEW 2.1 General Arctic Limnology 2.1.1 Thermal Regimes and Circulation 2.1.2 Biological Limnology 2.2 Sedimentation in Arctic Lakes 2.2.1 Sedimentary Processes 2.2.2 Deposits 2.3 Phycology and Paleophycology of High Arctic Lakes CHAPTER 3: METHODS 3.1 Basin Factors 3.1.1 Weather 3.1.2 Stream Sampling 3.1.3 Snowmelt, Depth of Ground Thaw, and Soil parameters 3.1.4 Measurement of Mass Wasting 3.2 General Limnology 3.3 Sediment Sampling and Analysis 3.3.1 Sediment Collection 3.3.2 Sediment Analysis 3.3.3 Microfossil Analysis 3.3.3.1 Diatoms and Chrysophytes 3.3.3.2 Chironomids CHAPTER 4: RESULTS 4.1 Basin Factors 4.1.1 Weather 4.1.2 Stream Discharge and Water Quality 4.1.3 Snow, Active Layer Thickness, and Soil Parameters 4.1.4 Mass Wasting 4.1.4.1 Gelifluction survey 4.1.4.2 Mudflows and other Observations 4. 2 Limnology 4.2.1 General Limnology - 1987 4.2.1.1 Lake Temperature 4.2.1.2 Lake Chemistry 4.2.1.3 Water Stage 4.2.1.4 Suspended Sediment 4.2.1.5 Algae 4.2.2 General Limnology - 1988 4.3 Sedimentology 4.3.1 Surficial Sediments 4.3.1.1 Structure and Grain Size 4.3.1.2 Organic Matter 4.3.1.3 Microfossils 4.3.2 Long Cores 4.3.2.1 Structure and Grain Size 4.3.2.2 Organic Matter 4.3.2.3 Dating 4.3.2.4 Microfossils CHAPTER 5: DISCUSSION 5.1 Basin Factors 5.1.1 Inflows 5.1.2 Mass Wasting 5.1.2.1 Rates of Soil Movement 5.1.2.2 Gelifluction as a Sediment Source 5.2 Limnology 5.3 Sedimentology 5.3.1 Recent Sedimentary Environment 5.3.2 Late Holocene Sedimentary Environment 5.3.2.1 Signal from Alluvial Fan River 5.3.2.2 Signal from Gelifluction 5.3.2.3 Signal from Lake Ice Cover 5.2.3.4 General Sedimentology 5.2.3.5 Paleophycology 5.3.3 Modelling Colour Lake Sedimentology . CHAPTER 6: CONCLUSIONS REFERENCES APPENDIX A: CORRECTION OF TALL BURIED STAKES APPENDIX B: TEST OF EFFECT OF IGNITION BEFORE SEDIGRAPHING APPENDIX C: DIATOM SPECIES LIST APPENDIX D: SEDIMENT VOLUME IN A SMALL MUDFLOW APPENDIX E: ICE RECORD VITA
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  • 52
    Monographie ausleihbar
    Monographie ausleihbar
    St. John's : Geological Association of Canada
    Signatur: MR 24.95645
    Materialart: Monographie ausleihbar
    Seiten: v, 194 Seiten , Illustrationen , 28 cm
    Ausgabe: Second printing
    ISBN: 091921634X , 0-919216-34-X
    Serie: Geoscience Canada reprint series 3
    Sprache: Englisch
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 53
    Signatur: MR 24.95646
    Materialart: Monographie ausleihbar
    Seiten: 27 Seiten , Illustrationen
    ISBN: 9171469311
    Serie: Report / University of Stockholm, Department of Quaternary Research 20
    Sprache: Englisch
    Anmerkung: Zugl.: Stockholm, Univ., Diss., 1991
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  • 54
    Monographie ausleihbar
    Monographie ausleihbar
    Hanover, NH : US Army Cold Regions Research and Engineering Laboratory
    Signatur: AWI G7-19-92301
    Beschreibung / Inhaltsverzeichnis: The pulse radiosounding technique was used in studying Antarctic land and sea ice, their internal structures, volumes, movements, and physical properties. Electromagnetic properties of different ice types and their measurement are discussed.
    Materialart: Monographie ausleihbar
    Seiten: 83 Seiten , Illustrationen
    Serie: Draft translation / Cold Regions Research and Engineering Laboratory, Corps of Engineers, U.S. Army 614
    Originaltitel: Radiozondirovanie lʺda 〈rus.〉
    Sprache: Englisch
    Standort: AWI Lesesaal
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  • 55
    Monographie ausleihbar
    Monographie ausleihbar
    Copenhagen : [Verlag nicht ermittelbar]
    Signatur: AWI G7-19-92326
    Materialart: Monographie ausleihbar
    Seiten: 59 Seiten , Illustrationen
    Sprache: Englisch
    Anmerkung: CONTENTS: Report on the 1995 activities of GRIP Operation Center (GOC). - Objective. - Kangerlussuaq (Søndre Strømfjord). - Preparation of field season. - Start of field season. - Communication. - Medevac. - Acknowledgement. - 1995 Field Season, Diary. - Maintenance / Logistics. - Bulk supplies. - Table of C130 flights. - Table of Twin Otter flights. - List of participants. - GRIP 1995 sub programs. - GRIP summaries 1989-1995. - GOC documentation 1989-1994. - Sitreps. - Daily reports from DOME GRIP. - Map of Northern Greenland. - List of GRIP addresses. - Tasks of GOC.
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  • 56
    Monographie ausleihbar
    Monographie ausleihbar
    Beirut : Librairie du Liban
    Signatur: 1.2/M 18.91851
    Materialart: Monographie ausleihbar
    Seiten: 1006 Seiten , Illustrationen
    ISBN: 9789953100005
    Sprache: Englisch , Arabisch
    Anmerkung: Text in Englisch und Arabisch
    Standort: Lesesaal
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  • 57
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-92/17
    In: CRREL Report, 92-17
    Beschreibung / Inhaltsverzeichnis: The CRREL Instrumented Vehicle (CIV), shear annulus, direct shear, andtriaxial compression devices were used to characterize the strength ofthawed and thawing soil. These strength values can be used in simpletraction models to predict the tractive performance of vehicles. Strength was evaluated in terms of the parameters c' and Φ' based on the Mohr-Coulomb failure criterion. It is proposed here that an instrumented vehicle is best suited for terrain characterization for mobility studies because the conditions created by a tire slipping on a soil surface are exactly duplicated. The c' and Φ' values from the shear annulus were found to overpredict traction because of the low normal stress applied by the annulus and the curved nature of the failure envelope. Of all the tests, the direct shear test yielded the highest Φ' value, most likely because the test was run at a slow deformation rate under drained conditions. The triaxial test results were the most similar to those from the vehicle. All test methods show Φ' increasingwith soil moisture up to the liquid limit of the soil and then decreasing. As measured with the vehicle, was also found to be strongly influenced by the thaw depth.
    Materialart: Schriftenreihen ausleihbar
    Seiten: 17 Seiten , Illustrationen
    Serie: CRREL Report 92-17
    Sprache: Englisch
    Anmerkung: CONTENTS Introduction Objective Background Strength measurement techniques Triaxial compression Direct shear Shear annulus device CRREL Instrumented Vehicle Discussion Comparison of methods Influence of soil conditions Traction prediction Conclusions References Abstract
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  • 58
    Signatur: ZSP-201-94/12
    In: CRREL Report, 94-12
    Beschreibung / Inhaltsverzeichnis: Subsurface radar was used to profile ice and snow conditions on the Ross Ice Shelf at McMurdo Station, Antarctica, during mid-January 1993. Deconvolution and migration were often used to improve vertical resolution and spatial imaging. Profiles at a pulse center frequency of 400 MHz along the 3.2-km-long Pegasus ice runway show many low-density horizons above 9 m depth that are up to 30 m long. They are associated with air bubbles included during refreezing of meltwater and are interpreted as layers between a few and tens of centimeters thick. There is a strong reflecting horizon at about 9 m depth that is probably from brine intrusion as it is continuous with the intrusion into the snow to the east. Diffraction asymptotes give a dielectric constant near 3.2 for material above the brine level, a value that implies near-solid ice. Profiles at 100 MHz along the road between Pegasus runway and Williams Field in the accumulation zone show snow features such as layer deformation and intrusive brine layers that both abruptly and gradually change in depth. A single profile at a relic solid waste dump at Williams Field detected buried debris and ice within the upper 7 m. A survey of a suspected fuel spill shows some local disturbances near the center, but no excavation was done to verify the findings. Profiles traversing the sewage sumps at Williams Field outline the extent of the sewage deposition, and give depths to contaminated snow that closely agree with observation. Despite variability in dielectric properties, single-layer migration effectively improves the resolution of subsurface conditions. Recommendations are made for future surveys.
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    Seiten: iv, 29 Seiten , Illustrationen
    Serie: CRREL Report 94-12
    Sprache: Englisch
    Anmerkung: CONTENTS Preface Introduction Radar equipment General operation Antennas Waveforms and phase polarity Antenna directivity Field procedures and data processing Field procedures Data recording Data processing Site location Results Pegasus runway Access road from Williams Field to Pegasus runway Williams Field Summary and conclusions Literature cited Appendix A: Airborne profile of a portion of the access road Abstract
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  • 59
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-76/29
    In: CRREL Report, 76-29
    Beschreibung / Inhaltsverzeichnis: In order to verify current theoretical equations on ice bearing capacity, a heavily loaded truck was used to make successive passes over two ice bridges. Equipment, weather and the normal problems associated with field work resulted in only one complete breakthrough test. Breakthrough occurred on one bridge with a vehicle weight of 53,630 lb (24,327 kg) and an ice thickness of 17.5 in. (44.5 cm). Since only one test was completed, the conclusions drawn cannot be unequivocal. However, the results do indicate that Nevel's equation for ultimate failure of a floating ice sheet is a good working tool.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 19 Seiten , Illustrationen
    Serie: CRREL Report 76-29
    Sprache: Englisch
    Anmerkung: Contents Abstract Preface Summary Introduction Location Test procedure Loading Site preparation and bridge construction Deflection measurements Conclusions Literature cited Appendix, Test data
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  • 60
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-76/44
    In: CRREL Report, 76-44
    Beschreibung / Inhaltsverzeichnis: The deformation of wet snow is explained in terms of the thermodynamics of the three phases of water. When deformation by particle rearrangement is fully developed, deformation can occur most rapidly by melting at the particle contacts. The rate of deformation is highly sensitive to the liquid water content, ionic impurity content, particle contact area, and stress level. A model of the hydrostatic deformation of wet snow is constructed, and examples of the deformation of wet snow are given for a variety of conditions. These results are in agreement with existing experimental evidence. The model accurately simulates the transient nature of the deformation and the effect of water content on the quasi-stable density of wet snow subjected to a constant stress.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 9 Seiten , Illustrationen
    Serie: CRREL Report 76-44
    Sprache: Englisch
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  • 61
    Schriftenreihen ausleihbar
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-76/47
    In: CRREL Report, 76-47
    Beschreibung / Inhaltsverzeichnis: This report describes two mechanical ice-cutting systems for the removal of ice collars at the high pool level on the Poe Lock of the St. Marys Falls Canal at Sault Ste. Marie, Michigan. One system was a narrow-kerf (3.25-in.-wide) coal-cutting chain saw mounted on a bar, driven by a 65-hp wheeled trencher. The other system was a lumber-cutting chain saw mounted on a bar, driven by a 30-hp wheeled soil trencher which cut a 0.56-in.-wide kerf. The lumber-cutting saw's bar was too flexible and the desired cutting traverse speed was not met. The coal-cutting saw cut 6-ft-deep ice collars at traverse speeds of up to 10 ft/min and is acceptable. With a few modifications, the coal-cutting saw would be operational.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iii, 20 Seiten , Illustrationen
    Serie: CRREL Report 76-47
    Sprache: Englisch
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  • 62
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-77/1
    In: CRREL Report, 77-1
    Beschreibung / Inhaltsverzeichnis: Studies of the growth history and structural characteristics of winter ice covers on two New Hampshire lakes are described. These investigations included measurements of ice cover thickness, characterization of the stratigraphic and crystalline structure of the ice, identification and classification of major ice types and measurements of electrolytic conductivity. The formation of cracks and flaws in the ice and their effects on the mechanical properties of the ice were also investigated. A method of correlating ice growth with surface wind and temperature measurement is described and the interrelationships of the various physical and mechanical properties of temperate lake ice covers are discussed.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 29 Seiten , Illustrationen
    Serie: CRREL Report 77-1
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Summary Introduction Study areas Study methods Winter freeze-up Composition of ice cover Freezing degree day records and applications Evaluation of ice growth coefficient α Growth history and entrapped bubble stratigraphy Mechanical properties Electrolytic conductivity Literature cited
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  • 63
    Signatur: MOP 44818 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: vii, 50 Seiten , 28 cm
    Sprache: Englisch
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  • 64
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-79/9
    In: CRREL Report, 79-9
    Beschreibung / Inhaltsverzeichnis: Sedimentation at the terminus of the Matanuska Glacier has been found to be primarily subaerial in a 100- to 300-m wide, ice-cored zone paralleling the edge of the active ice. Certain physical and chemical characteristics of the ice and debris of the superglacial, englacial and basal zones of the glacier indicate the debris of the basal zone, the primary source of sediment, is entrained during freeze-on of meltwater, probably surficially derived, to the glacier sole. Till formation results from the melting of buried ice of the basal zone. Melt-out till inherits the texture and particle orientations of basal ice debris; other properties are not as well preserved. Most deposits result from resedimentation of till and debris by sediment gravity flows, meltwater sheet and rill flow, slump, spall, and ice ablation. Depositional processes are interrelated in the process of backwasting of ice-cored slopes. Sediment flows are the primary process of resedimentation. Their physical characteristics, multiple mechanisms of flow and deposition, and characteristics of their deposits vary with the water content of the flow mass. Deposits of each process are distinguished from one another by detailed analysis of their internal organization, geometry and dimensions, and the presence of other internal and related external features. Genetic facies are defined by these characteristics. The interrelationship of processes develops a composite depositional sequence defined in terms of genetic facies associations; an upper, resedimented facies association, a middile, till facies association, and a lower, subglacial-resedimental facies association. The lateral and vertical distribution of genetic facies within the associations is mainly nonrepetitive.
    Materialart: Schriftenreihen ausleihbar
    Seiten: X, 112 Seiten , Illustrationen , 1 Beilage
    Serie: CRREL Report 79-9
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Summary Chapter 1. Introduction Field site Historical background Chapter 2. Characteristics of the debris and ice Characteristics of the facies and subfacies Basal zone Characteristics of the debris Discussion Chapter 3. Oxygen isotope analysis Sampling and analysis Results Discussion Chapter 4. Depositional processes—till formation Methods of analysis Environmental setting Till formation Chapter 5. Depositional processes—resedimentation Sediment flows Other resedimentation processes Resedimentation process relationships Chapter 6. Process distribution, sediment dispersal and depositional patterns Physical characteristics Sediment dispersal Sedimentary facies Patterns of terminus sedimentation Chapter 7. Conclusions Literature cited
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  • 65
    Signatur: MOP 45476 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: [400] Seiten , Illustrationen , 28 cm
    Sprache: Englisch
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  • 66
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-79/21
    In: CRREL Report, 79-21
    Beschreibung / Inhaltsverzeichnis: The report studies the question of whether Great Lakes freighters could move effectively through ice-clogged channels with the aid of tows provided by warping or kedging systems. Ten operational concepts are outlined, and their advantages and disadvantages are noted. The crushing resistance of floating brash ice is then analyzed. The neutral, active and passive states of stress for laterally confined brash ice are considered, and the resistance to horizontal thrusting by a smooth vertical wall is calculated for cohesionless brash ice, and for ice in which there is finite cohesion between the ice fragments. The thickening of the ice cover in the vicinity of a "pusher", and the formation of pressure ridges, are analyzed in order to estimate the amount of pile-up that can occur against a ship hull. The analysis then moves on to consideration of ship resistance by brash ice, taking into account crushing resistance at the bow, tangential friction at the bow, and hull friction aft of the bow section. Comparisons are made between thrust from the ship’s screws and the calculated ice resistance. The next section of the report estimates the force requirements for a warping or kedging system in terms of thrust augmentation for existing vessels. Tow cable requirements are given, and estimates are made for cable anchors and for anchorage of underwater structures. The force and power requirements for winches and windlasses are given, the practical problems involved in the pickup or transfer of cables are mentioned, and the report concludes with a brief appraisal. The conclusion is that a simple warping tug system is appropriate for a full scale experiment, a chain ferry with auxiliary barge seems attractive for an operational system, and a chain ferry plow may be an efficient way to clear ice from channels.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 21 Seiten , Illustrationen
    Serie: CRREL Report 79-21
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Introduction Operational concepts A. Warping tug system B. Chain ferry system C. Chain ferry with auxiliary barge D. Ski tow system E. Dual winch warping system F. Simple kedging G. Trailing-line system H. Above-surface dual winch system I. Pulley systems J. Chain ferry plow Crushing resistance of fragmented ice covers Resistance to ship passage by broken ice Crushing resistance at the bow Tangential friction at the bow Hull friction aft of the bow section Total ship resistance from brash ice Comparison of ship thrust and ice resistance Force requirements for a warping or kedging system Tow cable requirements Anchors and anchorages Force and power requirements for winches and windlasses Pickup or transfer of cable General appraisal Literature cited
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  • 67
    Signatur: PIK W 510-19-92837
    Materialart: Monographie ausleihbar
    Seiten: VIII, 62 Seiten , Illustrationen, Diagramme, Karten
    ISBN: 9529844026
    Serie: Working paper / European Forest Institute 3
    Sprache: Englisch
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  • 68
    Monographie ausleihbar
    Monographie ausleihbar
    Nerja : Patronato de la Cueva de Nerja
    Signatur: AWI G1-19-92413
    Materialart: Monographie ausleihbar
    Seiten: 354 Seiten , Illustrationen
    Serie: Trabajos sobre la Cueva de Nerja 3
    Sprache: Spanisch
    Anmerkung: ÍNDICE PRESENTACIÓN INTRODUCCIÓN INTRODUCTION ESTUDIO GEOLÓGICO DEL ENTORNO DE LA CUEVA DE NERJA l. INTRODUCCIÓN 1.1. Localización geográfica 1.2. Metodología de trabajo 1.3. Objetivos 2. ENCUADRE GEOLÓGICO GENERAL 3. ANTECEDENTES 4. ESTRATIGRAFÍA 4.1. Materiales alpujárrides 4.1.1. Manto de Almijara (Alpujárride Intermedio) 4.1.1.1. Esquistos oscuros 4.1.1.2. Esquistos claros 4.1.1.3. Calcosquistos 4.1.1.4. Mármoles de la base 4.1.1.5. Mármoles con intercalaciones de esquistos y calcosquistos 4.1.2. Manto de Guájares (Alpujárride Superior) 4.1.2.1. Esquistos oscuros 4.1.2.2. Esquistos claros 4.1.2.3. Mármoles 4.2. Materiales Neógeno-Cuaternarios 4.2.1. Unidad inferior pliocena 4.2.2. Unidad superior pliocena 4.2.3. Unidad pleistocena 4:2.3.1. Brechas y conglomerados 4.2.3.2. Gravas, arenas y limos 4.2.3.3. Travertinos 4.2.3.4. Depósitos litoquímicos 4.2.4. Unidad Holocena 5. ESTRUCTURA GEOLÓGICA 6. HISTORIA GEOLÓGICA BIBLIOGRAFÍA ANÁLISIS ESTRATIGRÁFICO DE LOS MATERIALES NEÓGENOCUATERNARIOS DE LA REGIÓN DE NERJA 1. INTRODUCCIÓN 2. ESTRATIGRAFÍA 2.1. Brechas rojas basales 2.2. Unidad inferior pliocena 2.2.1. Facies continentales de la Unidad inferior pliocena 2.2.2. Facies marinas de la Unidad inferior pliocena 2.2.3. Medio de depósito 2.3. Discordancia intrapliocena 2.4. Unidad superior pliocena 2.4.1. Facies marinas de la Unidad superior pliocena 2.4.2. Facies continentales de la Unidad superior pliocena 2.4.3. Medio de depósito 2.5. Unidad pleistocena 2.5.1. Descripción de los materiales 2.5.2. Medio de depósito y edad de los materiales 2.6. Otros materiales atribuibles al Pleistoceno 2.6.1. Travertinos 2.6.2. Facies detrítcias y cabonatadas del cruce de la carretera de la Cueva 2.7. Materiales del Holoceno 3. EVOLUCIÓN TECTOSEDIMENTARIA y PALEOGEOGRÁFICA 4. CONCLUSIONES BIBLIOGRAFÍA LA FRACTURACIÓN EN EL ENTORNO DE LA CUEVA DE NERJA 1. INTRODUCCIÓN 1.1. Antecedentes 1.2 Estructura del entorno de la Cueva de Nerja 2. RASGOS GENERALES DE LA FRACTURACIÓN 3. ESTUDIO DE LAS FALLAS 3.1. Las fallas mesoscópicas 3.2. Las grandes fallas 4. ESTUDIO DE LAS DIACLASAS 4.1. Resultado del estudio de la diaclasación en el entorno de la Cueva de Nerja 4.2. Estudio de la diaclasación en el interior de la Cueva 5. COMPARACIÓN DE LOS RESULTADOS OBTENIDOS EN LAS DIACLASAS Y FALLAS 6. ALGUNOS DATOS ACERCA DE LA CRONOLOGÍA DE LA FRACTURACIÓN E IMPORTANCIA DE LA MISMA 7. CONTROLES GEOLÓGICOS DE LA CUEVA DE NERJA: INFLUENCIA DE LA FRACTURACIÓN 8. CONCLUSIONES BIBLIOGRAFÍA ESTUDIO GEOMORFOLÓGICO DEL ENTORNO DE LA CUEVA DE NERJA 1. INTRODUCCIÓN 2. SÍNTESIS GEOLÓGICA Y ÁMBITO BIOCLIMÁTICO 3. ANÁLISIS MORFOMÉTRICO Y DE LA RED DE DRENAJE 3.1. Consideraciones previas. Rasgos hidrográficos generales 3.2. Características de forma 3.3. Características de relieve 3.4. Análisis de la red de drenaje 4. RASGOS GENERALES DEL MODELADO EN EL CONJUNTO MONTAÑOSO 4.1. Erosión hídrica y formas estructurales 4.2. Periglaciarismo y glaciarismo 4.3. Morfologías kársticas 5. EL PIEDEMONTE LITORAL: FORMAS Y PROCESOS 5.1. Morfologías relacionadas con las brechas pleistocenas 5.2. Otras morfologías 6. BOSQUEJO DE EVOLUCIÓN GEOMORFOLÓGICA. PROCESOS ACTUALES BIBLIOGRAFÍA ESTUDIO HIDROGEOLÓGICO DEL ENTORNO DE LA CUEVA DE NERJA 1. INTRODUCCIÓN 2. ANTECEDENTES 3. MARCO CLIMÁTICO 3.1. Precipitciones 3.2. Temperaturas 4. HIDROLOGÍA SUPERFICIAL 5. EL ACUÍFERO DE LAS ALBERQUILLAS 5.1. Descripción 5.2. Puntos de Agua 5.2.1. Pozos perforados 5.2.1.1. Piezometría 5.2.2. Manantiales 5.2.2.1. El manantial de Maro 5.3. Hidrogeoquímica 5.3.1. Aplicación de la hidroquímica a la investigación hidrogeológica 5.3.1.1. Distribución espacial 5.3.1.2. Evolución temporal 5.3.2. Aplicación de la hidroquímica a la karstogénesis 5.3.2.1. El sistema calcocarbónico 5.4. Funcionamiento del acuífero 6. LA CUEVA DE NERJA EN EL ACUÍFERO DE LAS ALBERQUILLAS BIBLIOGRAFÍA INTRODUCCIÓN A LA PETROLOGÍA DE LOS MÁRMOLES DE LA CUEVA DE NERJA Y MATERIALES ASOCIADOS 1. INTRODUCCIÓN 2. CONTEXTO GEOLÓGICO 3. DESCRIPCIÓN DE LAS ROCAS Y PETROGRAFÍA 3.1. Rocas Carbonáticas 3.1.1. Mármoles dolomíticos puros 3.1.2. Mármoles dolomíticos impuros 3.1.3. Mármoles calcíticos y rocas con silicatos cálcicos 4. COMPOSICIÓN QUÍMICA DE LOS MINERALES 5. EVOLUCIÓN METAMÓRFICA 5.1. Antecedentes 5.2. Metamorfismo de las rocas carbonáticas 5.3. Condiciones del metamorfismo 6. CONCLUSIONES BIBLIOGRAFÍA DATACIONES GEOCRONOLÓGICAS ABSOLUTAS (Métodos E.S.R. y Series de Uranio) EN LA CUEVA DE NERJA Y SU ENTORNO. IMPLICACIONES EVOLUTIVAS, PALEOCLIMÁTICAS Y NEOSISMOTECTÓNICAS 1. INTRODUCCIÓN 2. METODOLOGÍA 2.1. Campaña de muestreo 2.2. Métodos geocronológicos empleados 3. LOCALIZACIÓN Y DESCRIPCIÓN DE LAS MUESTRAS 3.1. Muestras del interior de la Cueva de Nerja 3.2. Muestras de depósitos sedimentarios del entorno exterior 4. RESULTADOS OBTENIDOS Y DISCUSIÓN 5. CONCLUSIONES: IMPLICACIONES EVOLUTIVAS, PALEOCLIMÁTICAS Y NEOSISMOTECTÓNICAS 5.1. Relativas a la evolución de la Cueva de Nerja 5.2. Relativas a la edad de algunos materiales del entorno 5.3. Relativas a los cambios paleoclimáticos de la región 5.4. Relativas a la neosismotectónica de la región BIBLIOGRAFÍA . ESTUDIO DE LA VENTILACIÓN DE LA CUEVA DE NERJA MEDIANTE LA CONCENTRACIÓN DE RADÓN 1 INTRODUCCIÓN 1.1. Radioactividad Natural 1.2. Cómo se puede medir la concentración en Rn 1.3. Exhalación en Rn del suelo 1.4. Método para evaluar la ventilación 2 DISPOSITIVO EXPERIMENTAL 2.1. Toma de muestras de aire 2.2. Medida del contenido en Rn de las células 2.3. Medida de la temperatura del aire de la Cueva 3 RESULTADOS 3.1. Concentración de Rn en la Cueva 3.2. Temperatura del aire en la Cueva 3.3. Evaluación del índice de ventilación BIBLIOGRAFIA CARACTERIZACIÓN ISOTÓPICA Y ANÁLISIS DE LOS PROCESOS DE DEGRADACIÓN DE LOS MATERIALES CARBONATADOS DE LA CUEVA DE NERJA. ESTUDIO PRELIMINAR 1. INTRODUCCIÓN 1.1. Antecedentes 1.2. Localización geológica y materiales estudiados 2. METODOLOGÍA 2.1. Muestreo 2.2. Estudio de laboratorio 2.2.1. Análisis mineralógico 2.2.2. Isótopos estables 2.2.3. Elementos traza 2.2.4. Microscopía electrónica de barrido 3 RESULTADOS OBTENIDOS 3.1. Espeleotemas 3.2. Roca encajante 3.3. Travertinos 3.4. Mustras de agua 4. INTERPRETACIÓN Y DISCUSIÓN DE LOS RESULTADOS 4.1. Isótopos estables 4.2. Estudio de las alteraciones 4.2.1. Procesos de alteración de carbonatos 4.2.2. Estudio de elementos traza 4.2.3. Estudio mineralógico 5 CONCLUSIONES AGRADECIMIENTOS BIBLIOGRAFÍA ESTUDIO GEOQUÍMICO DE LAS AGUAS DE INFILTRACIÓN DE LA CUEVA DE NERJA 1. INTRODUCCIÓN 2. METODOLOGÍA DE TRABAJO 2.1. Trabajo de campo 2.2. Trabajo de laboratorio 2.3. Trabajo de gabinete 3. LOS CAUDALES DE GOTEO 4. LOS PARÁMETROS FÍSICO-QUÍMICOS: (pH, TEMPERATURA y CONDUCTIVIDAD) 5. LA INFORMACIÓN HIDROGEOQUÍMICA 5.1. La química de los carbonatos 5.1.1. Los equilibrios calco-carbónicos, el pH de equilibrio y la presión parcial de CO2 5.1.2. La pC02 de las aguas de infiltración 5.1.3. El dpH de las aguas de infiltración 5.2. Las distintas clases de agua 5.3. Consideraciones sobre algunos componentes químicos de interés en las aguas de infiltración sensu stricto 5.3.1. Iones procedentes mayoritariamente del agua de lluvia 5.3.1.1. Cloruros (Cl-) 5.3:1.2. Sílice(SiO2) 5.3.1.3. Nitratos (NO3) 5.3.1.4. Sulfatos (SO4) 5.3.2. Iones procedentes fundamentalmente de los materiales acuíferos 5.3.2.1. Alcalinidad total (TAC) 5.3.2.2. Relación CA2+/Mg2+ 6. ALGUNOS ASPECTOS PARA LA CONSERVACIÓN DE LA CUEVA 7. CONCLUSIONES BIBLIOGRAFÍA MEDIDAS TOPOGRÁFICAS DE PRECISIÓN PARA CONTROL DE MICRODEFORMACIONES EN EL TECHO DE LA CUEVA DE NERJA 1. INTRODUCCIÓN 2. DESCRIPCIÓN DEL SISTEMA 3. MEDIDAS DE IMPLANTACIÓN 4. ALTIMETRÍA 5. RESULTADOS Y CONCLUSIONES AGRADECIMIENTOS BIBLIOGRAFÍA . , In spanischer Sprache , Zusammenfassung in englischer Sprache
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  • 69
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-76/26
    In: CRREL Report, 76-26
    Beschreibung / Inhaltsverzeichnis: Debris over a 44-mile stretch of the Chena River was studied. The study area extended from the first bridge on the Chena Hot Springs Road to the Chena River Flood Control damsite. The purpose of the study was to assess the potential danger to the Chena River Flood Control Dam outlet structure. Debris was catalogued, log jams were measured, and sources of debris were studied. The average size of logs was determined, as well as the number of logs present on the river. The authors concluded that a serious debris problem existed and would remain serious for the foreseeable future. Recommendations for debris handling were made.
    Materialart: Schriftenreihen ausleihbar
    Seiten: iv, 17 Seiten , Illustrationen
    Serie: CRREL Report 76-26
    Sprache: Englisch
    Anmerkung: Contents Abstract Preface Summary Introduction Origin of debris Volume, magnitude Types of debris Hazards of the debris Recommended measures to counteract log jamming Conclusions and recommendations Future work Epilogue Selected bibliography Appendix: Additional photographs of Chena River debris
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  • 70
    Signatur: MOP 40847 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: x, 424 Seiten
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
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  • 71
    Signatur: MOP 41324/I / Mitte
    Materialart: Monographie ausleihbar
    Seiten: 162 Seiten
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
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  • 72
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
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    Signatur: ZSP-201-93/3
    In: CRREL Report, 93-3
    Beschreibung / Inhaltsverzeichnis: Results are presented of a study to determine appropriate methods of flow modification for mitigating ice jam formation in navigable rivers. Based on a review of alternative methods for flow modification, it is concluded that for many rivers, especially large ones, the most appropriate method involves controlled ice-cover formation through the regulation of river flow. Flow discharge and stages would be regulated by controlling the flow releases from reservoirs and flow stages at river dams, such that optimal flow conditions prevail for rapid formation, and subsequent maintenance, of an accumulation ice cover over river reaches in which potentially large amounts of frazil ice may grow. Accumulation covers would be formed of frazil ice pans and floes and, if appropriate, broken ice conveyed from upstream. Existing dams, augmented where needed by navigable ice booms, could serve as retention structures for the development of accumulation covers. A preliminary indication of the feasibility of this method for controlling ice-cover formation on stage-regulated pools of the Ohio River is assessed through the use of a numerical model that simulates ice-cover formation from frazil ice. It is found that this approach holds promise for mitigating jam occurrence, although its implementation necessarily entails management of flow through major portions of the Ohio River. The results of the study are, to a limited extent, generalized to other rivers.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 58 Seiten , Illustrationen
    Serie: CRREL Report 93-3
    Sprache: Englisch
    Anmerkung: CONTENTS Preface Nomenclature Introduction Background Scope of the study Control of river ice formation Control methods Controlled ice-cover formation for the upper Ohio River Numerical simulation of ice-cover formation Flow profile Water temperature variation Frazil ice growth Ice-cover progression Thermal growth of ice cover Numerical results Illustration of simulated ice-:over formation Ice-cover formation in the Hannibal and Montgomery pools Generalized results Conclusions and recommendations Literature cited Appendix A: Expression for coefficients Appendix B: Listing of computer program
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  • 73
    Monographie ausleihbar
    Monographie ausleihbar
    Dordrecht : Springer | New York [u.a.] : Chapman & Hall
    Signatur: AWI G3-20-93489
    Beschreibung / Inhaltsverzeichnis: Frozen Ground Engineering first introduces the reader to the frozen environment and the behavior of frozen soil as an engineering material. In subsequent chapters this information is used in the analysis and design of ground support systems, foundations, and embankments. These and other topics make this book suitable for use by civil engineering students in a one-semester course on frozen ground engineering at the senior or first-year-graduate level. Students are assumed to have a working knowledge of undergraduate mechanics (statics and mechanics of materials) and geotechnical engineering (usual two-course sequence). A knowledge of basic geology would be helpful but is not essential. This book will also be useful to advanced students in other disciplines and to engineers who desire an introduction to frozen ground engineering or references to selected technical publications in the field. BACKGROUND Frozen ground engineering has developed rapidly in the past several decades under the pressure of necessity. As practical problems involving frozen soils broadened in scope, the inadequacy of earlier methods for coping became increasingly apparent. The application of ground freezing to geotechnical projects throughout the world continues to grow as significant advances have been made in ground freezing technology. Freezing is a useful and versatile technique for temporary earth support, groundwater control in difficult soil or rock strata, and the formation of subsurface containment barriers suitable for use in groundwater remediation projects.
    Materialart: Monographie ausleihbar
    Seiten: x, 352 Seiten , Illustrationen
    ISBN: 978-1-4757-2292-5
    Sprache: Englisch
    Anmerkung: Contents PREFACE CHAPTER 1. FROZEN GROUND 1.1 Frozen ground support systems Frozen earth wall Design considerations 1.2 Seasonally and perennially frozen ground Cold regions: definition Subsurface temperatures Active layer, Permafrost 1.3 Terrain features in permafrost areas Ground ice features Patterned ground 1.4 Engineering considerations Freezing process Thawing of frozen ground Frost action Useful aspects of frozen ground Ice as a construction material Problems CHAPTER 2. PHYSICAL AND THERMAL PROPERTIES 2.1 Composition and structure of frozen ground Soil types Phase relationships Ice phase Particle size and size distribution Consistency of cohesive soils 2.2 Soil classification Unified soil classification system Frozen soil classification 2.3 Water-ice phase relationships Unfrozen water in frozen soil Effect of solutes on freezing 2.4 Soil frost action Frost action process Frost susceptibility of soils Frost-heave forces Freeze-thaw effects on permeability 2.5 Thermal properties Thermal conductivity Heat capacity Thermal diffusiuity Latent heat of fusion Thermal expansion (or contraction) Problems CHAPTER 3. HEAT FLOW IN SOILS 3.1 Heat transfer at the ground surface Climatic factors Freezing (or thawing) indices Surface n-factor 3.2 Seasonal ground freezing (or thawing) Frost depth Thawing of frozen soil Design implications 3.3 Temperature below cooled (or heated) areas Steady state heat flow Transient temperatures Periodic heat flow 3.4 Thermal analysis: frozen ground support systems Single freeze pipe Wall formation Multiple rows of freeze pipes Problems CHAPTER 4. THAW BEHAVIOR OF FROZEN GROUND 4.1 Thaw settlement 4.2 Consolidation of thawing soils Thaw consolidation Residual stress in thawing soils 4.3 Thaw-consolidation in some layered systems Two layer soil problems Compressible soil ouer discrete ice layers Problems CHAPTER 5. MECHANICAL PROPERTIES OF FROZEN SOILS 5.1 Stress-strain-time and strength behavior Hydrostatic pressure effect on frozen soil behavior Shear stress effect on frozen soil behavior 5.2 Factors influencing creep and strength Creep of frozen soil under constant stress Stress-strain behavior under constant strain rate Ice content effect on strength Normal pressure effect on strength Strain rate effect on strength Temperature effect on strength Frozen soil behauior at cryogenic temperatures 5.3 Analytical representation of creep and strength data General creep equation Strength of frozen soils Comparison with Vyalou's creep and strength equations Normal pressure effect on creep and strength Salinity effect on frozen soil creep and strength 5.4 Frozen soil behavior in uniaxial tension 5.5 Deformability of frozen soils 5.6 Compressibility of frozen soils Problems CHAPTER 6. CONSTRUCTION GROUND FREEZING 6.1 Design considerations Ground freezing applications Soil conditions Groundwater flow Ground movement 6.2 Freezing methods and system installation Primary plant and pumped loop secondary coolant Expendable liquid refrigerant Installation of the cooling system 6.3 Structural design of frozen earth walls Curved walls Straight walls and combinations Tunnels Finite-element method 6.4 Monitoring requirements Freeze hole deviation Temperature Frost boundary location and wall thickness 6.5 Other construction considerations Protection of exposed frozen earth Concrete placement against frozen earth Problems CHAPTER 7. FOUNDATIONS IN FROZEN SOILS 7.1 General considerations Foundations in seasonally frozen ground Foundations in permafrost 7.2 Shallow foundations Selection of foundation method Design of shallow foundations Bearing capacity Settlement considerations 7.3 Pile foundations Pile types Pile placement Pile freezeback Axially loaded piles Laterally loaded piles Anchors in frozen ground 7.4 Frost-heave forces on foundations Tangential forces on a vertical surface Design for frost heave Problems CHAPTER 8. STABILITY OF SOIL MASSES IN COLD REGIONS 8.1 Landslides in permafrost: classification 8.2 Slopes in thawing permafrost Low-angle planar flows Slides 8.3 Slopes in frozen soils 8.4 Slope stabilization methods Construction and design techniques Stabilization of planar slides Stabilization of cut slopes Problems CHAPTER 9. EARTHWORK IN COLD REGIONS 9.1 Site considerations Drainage Thermal and frost action factors Subsurface conditions Material sources 9.2 Excavation and transport Mechanical excavation Drilling and blasting Thawing frozen soil Hydraulic dredging 9.3 Field placement Compaction Placement in water 9.4 Water-retaining embankments on permafrost Unfrozen embankments Frozen embankments Maintaining the frozen state Thermal and stability considerations 9.5 Embankment performance Frost heave Settlement Stability Artificial islands CHAPTER 10. FIELD INVESTIGATIONS 10.1. Sampling frozen ground Sampling methods Sample protection 10.2 Ground-temperature measurement Temperature sensors and measuring equipment 10.3 Field testing of frozen soils Field test methods Pressuremeter test Deep static cone penetration test Other types of field tests 10.4 Geophysical methods Seismic velocities in frozen ground Electrical properties of frozen ground Geophysical techniques used in frozen ground High-frequency electrical methods Borehole logging in permafrost APPENDIX A. SYMBOLS APPENDIX B. SI UNITS APPENDIX C LABORATORY AND FIELD TESTS ON FROZEN SOILS C1 Handling, storage, and machining of specimens prior to testing C2 Uniaxial compression test C3 Uniaxial tensile test C.4 Salinity of soil pore water C5 Thermosiphon C6 Pile load test in permafrost REFERENCES AUTHOR INDEX SUBJECT INDEX
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  • 74
    Signatur: MOP 45353 / MItte
    In: Developments in atmospheric science, 9
    Materialart: Monographie ausleihbar
    Seiten: 327 Seiten , Illustrationen
    ISBN: 0444417486
    Serie: Developments in atmospheric science 9
    Sprache: Englisch
    Anmerkung: CONTENTS Preface CONFERENCE SUMMARY / A. L. Fymat TEMPERATURE SOUNDING INVERSION METHODS AND THE OBSOLESCENCE OF DIFFERENTIAL EQUATIONS FOR SPECIFYING PHYSICAL OBSERVABLES / J. I. F. King SOME EXPERIMENTS ON THE EFFECT OF REMOTE SOUNDING TEMPERATURES UPON WEATHER FORECASTING / M. Halem, M. Ghil and R. Atlas NONLINEAR INVERSION: THEORY AND PRAXIS / J. I. F. King A NEW TREATMENT OF THE BOUNDARY TERM IN THE INVERSION OF THE RADIATIVE TRANSFER EQUATION / H. E. Fleming and D. S. Crosby EVALUATION OF ERRORS IN DERIVED CLEAR COLUMN RADIANCES / L. McMillin RECURSIVE FILTERING OF RADIANCE DATA FROM NIMBUS-E SATELLITE / I. A. Ismail DEPENDENCE OF THE TEMPERATURE DEVIATION OF THE OCEAN SURFACE AS MEASURED BY SATELLITE ON THE SIZE DISTRIBUTION OF AEROSOLS / T. Takashima THE DETERMINATION OF ATMOSPHERIC TEMPERATURE PROFILES FROM INFRARED INTERFEROMETER MEASUREMENTS ON BOARD OF METEOR-25 / V. A. Golovko and D. Spänkuch COMPOSITION SOUNDING GLOBAL TOTAL OZONE DETERMINATION FROM NIMBUS 4 BUV SPACECRAFT DATA / A. J. Fleig, R. S. Fraser, B. W. Guenther, D. F. Heath, E. Hilsenrath, L. V. Novak, V. G. Kaveeshwar, R. D. McPeters, C. L. Mateer and A. G. Miller INFORMATION CONTENT AND RESULTS OF NON-LINEAR INVERSION OF NIMBUS 6 LIMB RADIANCE INVERSION RADIOMETER DATA / J. C. Gille and P. L. Bailey AN APPROXIMATE METHOD FOR NONLINEAR INVERSION OF LIMB RADIANCE OBSERVATIONS / P. L. Bailey and J. C. Gille A NONLINEAR TECHNIQUE FOR INVERTING LIMB ABSORPTION PROFILES / J. D. Mill and S. R. Drayson SENSITIVITY OF THE INVERSION OF LIMB RADIANCE MEASUREMENTS IN THE 6.3μm WATER VAPOR BAND / H. Fischer AN ANALYSIS OF NIMBUS-V THIR 6-7 μm OBSERVATIONS OVER THE MEDITERRANEAN SEA / M. Roulleau MICROWAVE GROUND-BASED DETERMINATION OF ATMOSPHERIC TOTAL WATER CONTENT / G. G. Shchukin and L. P. Bobylev A SOLAR HETERODYNE RADIOMETER FOR THE DETERMINATION OF THE ALTITUDINAL PROFILES OF ATMOSPHERIC GASES / V. I. Astakhov, N. V. Vanin, V. V. Galaktionov, V. M. Dorokhov, V. M. Zakharovand V. U. Khattatov PASSIVE REMOTE SENSING IN THE PRESENCE OF MULTIPLE SCATTERING: A NUMERICAL INVERSION METHOD / B. R. Barkstrom PARTICULATE SOUNDING RECONSTRUCTING THE SIZE DISTRIBUTION OF SPHERICAL PARTICLES FROM ANGULAR FORWARD SCATTERING DATA / A. L. Fymat and K. D. Mease COMPLEX REFRACTIVE INDEX OF ATMOSPHERIC AEROSOLS: A SIZE DISTRIBUTION INDEPENDENT RETRIEVAL APPROACH USING MULTISPECTRAL TRANSMISSION RATIOS / A. L. Fymat and K. D. Mease THE METHOD OF MULTIFREQUENCY LASER SOUNDING OF ATMOSPHERIC AEROSOL MICROSTRUCTURE / V. E. Zuev and I. E. Naats LASER SOUNDING OF THE ATMOSPHERE USING AEROSOL SCATTERING / V. E. Zuev STRATOSPHERIC AEROSOL LAYERS MONITORED BY LIDAR / R. Reiter, H. Jaeger, W. Carnuth and M. Littfass LIDAR DETECTION OF ATMOSPHERIC CONTAMINANTS BY RAMAN SCATTERING AND FLUORESCENCE SPECTRA / V. M. Zakharov and V. A. Torgovichev REMOTE SENSING OF CLOUD PROPERTIES FROM NIMBUS 5 / D. J. McCleese THE ATMOSPHERIC BLURRING EFFECT OF REMOTELY SENSED EARTH IMAGERY / S. Ueno, Y. Haba, Y. Kawata, T. Kusaka and Y. Terashita Author Index Subject Index
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  • 75
    Monographie ausleihbar
    Monographie ausleihbar
    Garmisch-Partenkirchen : Physikalisch-Bioklimatische Forschungsstelle der Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung
    Signatur: MOP 40082 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: ca. 100 Seiten
    Serie: AEC Document Number NYO - 3425 - 10
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
    Zweigbibliothek: GFZ Bibliothek
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  • 76
    Monographie ausleihbar
    Monographie ausleihbar
    Wellington : New Zealand Meteorological Service
    Signatur: MOP 44877 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: 127 Seiten
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
    Zweigbibliothek: GFZ Bibliothek
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  • 77
    Signatur: MOP 40801 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: II, 170 Seiten , Illustrationen
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
    Zweigbibliothek: GFZ Bibliothek
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  • 78
    Signatur: MOP 44705 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: iii, 78 Seiten , 24 cm
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
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  • 79
    Monographie ausleihbar
    Monographie ausleihbar
    [Reading] : European Centre for Medium Range Weather Forecasts
    Signatur: MOP 47681 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: vii, 480 Seiten , Illustrationen , 30 cm
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
    Zweigbibliothek: GFZ Bibliothek
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  • 80
    Monographie ausleihbar
    Monographie ausleihbar
    Oak Ridge, Tenn. : U.S. Department of Energy
    Signatur: MOP 44436 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: 15, 3, 5 Seiten
    Sprache: Englisch
    Anmerkung: The field experiments were continued to estimate convective storm particulate scavenging efficiency in proximity to the St. Louis, Missouri urban-industrial complex. Complementary studies of the urban aerosol characterization, source strength, and removal processes were also studied. The 1975 field effort shifted emphasis from the immediate St. Louis area to the Alton-Wood River industrial complex. Along with the change in size and configuration of the network, there were increases in the numbers of most types of samplers. The new network yielded the following types of samples for analysis and interpretation: 1065 total rain samples from 85 sites; 68 sequential rainwater samples from 2 locations; 272 wet/dry samples from 7 locations; 216 air filter samples from 7 locations; 36 air filter samples from aircraft; and raindrop spectrometer data from 11 sites for the period 17 June-18 August. The analysis procedures require that all water samples undergo filtering for separate analyses of soluble and insoluble fractions of the elemental concentrations. This data collection effort provided a record number of samples for chemical analysis. Approximately 4000 pibals and over 370 radiosondes were released in the operational period, providing wind and thermodynamic data on 33 days. Aircraft missions were flown on 24 days, with one air tracer release of cesium on 19 July 1975. The status of the analysis of all types of data is described.
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  • 81
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-79/14
    In: CRREL Report, 79-14
    Beschreibung / Inhaltsverzeichnis: Solid ice growth rates due to the presence of frazil slush beneath the ice cover have been shown to be greater than the so-called static growth. The frazil slush reduces the effective heat of ice solidification and the frazil particles freeze into the interstitial water. Numerical schemes are presented which clearly show the effect of frazil ice porosity on ice cover growth rates and the numerical model using air temperature as the major input is compared with field data on ice thickness in a small river laden with frazil ice beneath its cover.
    Materialart: Schriftenreihen ausleihbar
    Seiten: ii, 4 Seiten , Illustrationen
    Serie: CRREL Report 79-14
    Sprache: Englisch
    Standort: AWI Archiv
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  • 82
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-79/22
    In: CRREL Report, 79-22
    Beschreibung / Inhaltsverzeichnis: Field observations at 60 Sites located in the fast or near-fast ice along a 1200-km stretch of the north coast of Alaska between Bering Strait and Barter Island have shown that the great majority of the ice samples (95%) exhibit striking c-axis alignments within the horizontal plane. Such alignments were usually well developed by the time the ice was 50 cm thick and in some cases when the ice was 20 cm thick. In all cases the degree of preferred orientation increased with depth in the ice. Representative standard deviations around a mean direction in the horizontal plane are commonly less than ± 10° for samples collected near the bottom of the ice. The general patterns of the alignments support a correlation between the preferred c-axis direction and the current direction at the ice/water interface. A comparison between c-axis alignments and spot current measurements made at 42 locations shows that the most frequent current direction coincides with the mean c-axis direction. Such alignments are believed to be the result of geometric selection with the most favored orientation being that in which the current flows normal to the (0001) plates of ice that compose the dendritic sea ice/sea water interface.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 21 Seiten , Illustrationen
    Serie: CRREL Report 79-22
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Summary Introduction Techniques and sampling Observations Crystal alignments “Odd” sites Causes Conclusions Literature cited Appendix A: Current observations
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  • 83
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-79/19
    In: CRREL Report, 79-19
    Beschreibung / Inhaltsverzeichnis: The critical velocities of loads moving over floating ice plates have been determined by several authors. In all these analyses it was assumed that the in-plane force field in the ice cover is zero. However, due to constrained thermal strains, in-plane forces do occur in the field. The purpose of the present paper is to determine their effect upon the critical velocities of the moving loads. It is shown that a uniform compression force field reduces the critical velocity, whereas a tension force field has the opposite effect.
    Materialart: Schriftenreihen ausleihbar
    Seiten: ii, 12 Seiten , Illustrationen
    Serie: CRREL Report 79-19
    Sprache: Englisch
    Standort: AWI Archiv
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  • 84
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-79/17
    In: CRREL Report, 79-17
    Beschreibung / Inhaltsverzeichnis: Six test roofs of two different slopes — 16.3° and 39.8°, and three different roof coverings — asphalt shingles, cedar shingles, and corrugated aluminum sheeting, were constructed at USACRREL, Hanover, New Hampshire, and were instrumented with thermocouples, heat flow meters, and calibrated gutters. Measurements were recorded for the winters of 1971-72 and 1972-73. The degree of icing and the chronological changes in the snow cover were recorded on 35-mm Kodachrome slides. It was found that eave icing is a sensitive function of the slope, roof covering composi­tion, and solar radiation. The effects of wind were not investigated; the data were screened to remove all informa­tion corresponding to windspeeds over 8 km/h. In order of increasing tendency to form ice dams on the eaves, the roofs were high-slope asphalt, high-slope cedar, high-slope aluminum, low-slope asphalt, low-slope cedar, and low- slope aluminum.
    Materialart: Schriftenreihen ausleihbar
    Seiten: vi, 40 Seiten , Illustrationen
    Serie: CRREL Report 79-17
    Sprache: Englisch
    Anmerkung: CONTENTS Abstract Preface Summary Introduction Experimental procedure Description of roofs Meteorological data Procedure Analysis General Temperature profiles Temperature rankings Heat flow Snow depths and meltwater volumes Degree of icing Results and conclusions General Temperature profiles of the roofs Comparative temperatures of roofs by section — rankings Heat flow and accumulation Snow depth, coverage, and meltwater Degree of icing Discussion of the icing problem Literature cited
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  • 85
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Dazugehörige Bände
    Signatur: ZSP-201-79/16
    In: CRREL Report, 79-16
    Beschreibung / Inhaltsverzeichnis: In 1973 two membrane encapsulated soil layer (MESL) test sections were constructed into existing gravel surfaced roads at Elmendorf A FB and at Ft. Wainwright in Anchorage and Fairbanks, Alaska, respectively. The Elmendorf AFB MESL contains a silty clay soil and the Ft. Wainwright MESL contains a nonplastic silt. Both sections were constructed at soil moisture contents of approximately 2% to 3% below optimum for the CE-12 compactive effort. There were no indica­tions of soil moisture migration during freezing in either test section and after-thaw field California Bearing Ratio values were nearly equal to values measured before freezing. There is growing evidence of a slight increase in the overall soil moisture content in the Elmendorf AFB MESL possibly from moisture entering through the single layer polyethylene sidewalls which were not treated with asphalt emulsion. There is good evidence that the membrane of the same section might have received damage during a soil sampling operation which allowed localized moisture infiltration. A two-layer polyethylene membrane used in the Ft. Wainwright MESL is considered a more positive moisture barrier than the single sheet and a justifiable added cost for permanent construction.
    Materialart: Schriftenreihen ausleihbar
    Seiten: v, 27 Seiten , Illustrationen
    Serie: CRREL Report 79-16
    Sprache: Englisch
    Anmerkung: CONTENTS Preface Introduction Laboratory studies General Elmendorf AFB silty clay Fairbanks silt Field studies Elmendorf AFB MESL Ft. Wainwright MESL Traffic use Elmendorf AFB MESL Ft. Wainwright MESL Performance observations Elmendorf AFB MESL Ft. Wainwright MESL Conclusions Elmendorf AFB MESL Ft. Wainwright MESL General Literature cited Appendix A. The MESL concept Appendix B. Classification, compaction, freezing and CBR test results for Fairbanks silt
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  • 86
    Signatur: MOP 44440 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: 105 Seiten , Illustrationen , 27 cm
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
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  • 87
    Monographie ausleihbar
    Monographie ausleihbar
    Wageningen : Centre for Agricultural Publ.and Documentation
    Signatur: MOP 44708 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: 141 Seiten , Illustrationen
    ISBN: 9022006018
    Serie: Simulation monographs
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
    Zweigbibliothek: GFZ Bibliothek
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  • 88
    Monographie ausleihbar
    Monographie ausleihbar
    Bracknell : European Centre for Medium Range Weather Forecasts
    Signatur: MOP 40015 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: Seite 307-713 , Illustrationen, Diagramme
    Serie: Seminars of scientific foundation of medium range weather forecasts 2
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
    Zweigbibliothek: GFZ Bibliothek
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  • 89
    Monographie ausleihbar
    Monographie ausleihbar
    Hong Kong : Royal Observatory
    Signatur: MOP 47253(1989) / Mitte
    Materialart: Monographie ausleihbar
    Seiten: 96, [2] Seiten , Illustrationen
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
    Zweigbibliothek: GFZ Bibliothek
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  • 90
    Signatur: MOP 44126/2 / Mitte
    In: Proceedings of the tenth international symposium on remote sensing of environment, Volume 2
    Materialart: Monographie ausleihbar
    Seiten: Seiten XLIX, 671-1456
    Serie: Proceedings of the tenth international symposium on remote sensing of environment 2
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
    Zweigbibliothek: GFZ Bibliothek
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  • 91
    Signatur: MOP 40704 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: VI, 35 Seiten
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
    Zweigbibliothek: GFZ Bibliothek
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  • 92
    Monographie ausleihbar
    Monographie ausleihbar
    Washington : Special Committee for Solar-Terrestrial Physics (SCOSTEP), National Academy of Sciences
    Signatur: MOP 43858/1 / Mitte
    Materialart: Monographie ausleihbar
    Seiten: 142 Seiten , Illustrationen , 28 cm
    Sprache: Englisch
    Standort: MOP - Bitte bestellen
    Zweigbibliothek: GFZ Bibliothek
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  • 93
    Monographie ausleihbar
    Monographie ausleihbar
    Cambridge : British Antarctic Survey
    Signatur: AWI Bio-21-94362
    Materialart: Monographie ausleihbar
    Seiten: 214 Seiten , Illustrationen , 30 cm
    Ausgabe: 1st published
    ISBN: 0856651400
    Sprache: Englisch
    Anmerkung: TABLE OF CONTENTS ECOLOGY 1 Sea ice: its formation, distribution and properties 2 Ice-associated ecosystems 3 Ice diatoms 4 Techniques for sampling sea-ice algae 5 The Antarctic planktonic ecosystem 6 Some aspects of the large-scale physical oceanography of the Arctic Ocean influencing biological oceanography 7 Arctic planktonic ecosystems 8 Arctic plankton diatoms: dominant species, biogeography 9 The paleontological significance of fossil diatoms from the high-latitude oceans TAXONOMY 10 Key to diatom families and glossary 11 Family Thalassiosiraceae Section 1: the genera Skeletonema, Pororsira, Bacterosira, and Detonula and the genus Thalassiosira from the Arctic Section 2: the genus Thalassiosira from the Antarctic 12 Family Leptocylindraceae: the genus Corethron 13 Family Coscinodiscaceae: the genus Stellarima 14 Family Hemidiscaceae: the genera Actinocyclus and Azpeitia 15 Family Rhizosoleniaceae: the genera Rhizosolenia and Proboscia 16 Family Biddulphiaceae: the genus Eucampia 17 Family Diatomaceae: the genera Thalassiothrix and Trichotoxon 18 Family Naviculaceae: Arctic species of the genera Diploneis, Gyrosigma, Haslea, Navicula, Pinnularia, Pleurosigma, Stauroneis and Stenoneis 19 Family Naviculaceae: the genera Plagiotropis, Manguinea, Membraneis, and Banquisia 20 Family Naviculaceae: the genus Pseudogomphonema 21 Family Auriculaceae and Bacillariaceae: the genera Auricula, Hantzschia, and Nitzschia 22 Family Bacillariaceae: the genus Nitzschia section Pseudonitzschia 23 Family Bacillariaceae: the genus Nitzschia section Nitzschiella 24 Family Bacillariaceae: the genus Nitzschia section Fragilariopsis BIBLlOGRAPHY
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  • 94
    Dissertationen
    Dissertationen
    Waterloo, ON : Wilfrid Laurier University
    Signatur: AWI G4-22-94986
    Beschreibung / Inhaltsverzeichnis: Hydrological processes occurring within the vadose zone, especially in heterogeneous soils and tills typical of the Canadian shield, are not well understood. This research investigates the importance of the vadose zone in a small headwater basin (Harp 4-21) in the Canadian shield with respect to the generation of stream runoff quantity and quality during episodic rainfall and snowmelt events. The study focused specifically on: firstly the effect of variable antecedent moisture conditions on water-table and stream response, secondly, the significance of the stored vadose water in water extracted from a rising water-table, and thirdly the significance of preferential flowpathways in the vadose zone as a means of rapidly rotating, stored vadose water to the stream during runoff events. The instrumentation of the Harp 4-21 basin includes three v-notch weirs along the stream, numerous piezometers and wells, several soil lysimeters, and three tensiometer nests. Much of the data used in this study was obtained from five sites located along a hillslope transect. Soil water content at each of the hillslope sites was accurately determined using time domain reflectometry (TDR), whereas water table elevations were measured using both electronic water level tapes and calibrated rod floats. Preferential flowpath data was derived from flow gauging and chemical analyses of water samples. Results obtained from the near-stream and lower slope reaches of the hillslope transect indicated that soil water content in the vadose zone is maintained at a high level of saturation by shallow water-table depths. Further analysis of simultaneously measured soil water content and depth to water—table data clearly showed that the existence of a thick essentially saturated zone overlying the water table (capillary fringe) was responsible for the large and rapid water-table responses observed during many of the nine studied precipitation events. On a basin scale, the seasonal variability of the area in which the capillary fringe extended to the ground surface was largely responsible for the observed trend in basin yield (runoff volume/ rainfall volume) for the nine runoff events. Chemical tracing results using silica, pH and DOC showed that the large vadose water reservoir in the near-stream and lower slope areas was a dominant component in water extracted from a rising water-table during most precipitation events. Silica results from the near-stream vadose zone showed that only the massive groundwater recharge associated with spring snowmelt could completely replace the vadose water reservoir with shorter residence time snowmelt/rainfall water. The rapid routing of stored near-stream capillary fringe vadose water through preferential pathways (macropores, soil pipes) was a significant source of runoff to the stream during runoff events. The presence of soil pipes, along with the significant vadose water reservoir in near-stream and lower slope areas are sufficient to explain the large phreatic/vadose water component typically identified in two component flow separation models, and constitutes the basis of a physically-based conceptual runoff model for the Harp 4-21 basin.
    Materialart: Dissertationen
    Seiten: 172 Seiten , Illustrationen
    Sprache: Englisch
    Anmerkung: Masterarbeit, Wilfrid Laurier University, Waterloo, 1992 , Table of Contents Abstract Acknowledgements List of Figures List of Tables Chapter 1 Introduction and Literature Review 1.1 introduction 1.2 Research objectives 1.3 Literature review 1.3.1 Overland flow 1.3.2 Overland flow from partial areas 1.3.3 Subsurface stormflow 1.3.4 The variable source area subsurface stormtlow concept 1.3.5 Groundwater and the capillary fringe effect 1.3.6 Preferential flow 1.3.6.1 Macropore flow 1.3.6.2 Unstable flow 1.4 Summary of uncertainties in the vadose zone Chapter 2 Methodology 2.1 Introduction 2.2 The Harp 4-21 basin: site description 2.2.1 Basin topography 2.2.2 Bedrock and surficial geology 2.2.3 Vegetation 2.2.4 General hydrology 2.3 Basin instrumentatio 2.3.1 Stream 2.3.2 Phreatic zone 2.3.3 Vadose zone 2.3.3.1 Soil moisture 2.3.3.2 Preferential flowpaths 2.4 Hillslope transect instrumentation 2.4.1 The hillslope transect 2.4.2 Time domain reflectometry 2.4.3 Vadose water extraction 2.5 Sampling techniques, frequency and chemical analyses 2.5.1 Precipitation 2.5.2 Stream 2.5.3 Phreatic zone 2.5.4 Vadose zone 2.5.4.1 Soil moisture measurement and analysis of the TDR trace 2.5.4.2 Vadose water sampling 2.5.5 Chemical analysis Chapter 3 Results and Discussion: Antecedent Moisture Conditions 3.1 Introduction 3.2 Runoff events ~ampled during the May 1990 - April 1991 field season 3.3 Assessment of antecedent moisture conditions in the Harp 4-21 basin 3.3.1 Seasonal basin yield 3.3.2 Seasonal depth to water-table 3.3.3 Tensiometric data 3.3.4 Soil moisture conditions in the hillslope transect (Time Domain Reflectometry) 3.3.4.1 Soil water content/depth to water-table relationship 3.3.4.2 Estimation of the capillary fringe thickness and the temporal variation of basin area in which it extends to the ground surface 3.4 Assessment of the origin of water in the vadose zone of near-stream and lower slope areas which experience significant water-table responses during runoff generating events 3.4.1 Introduction 3.4.2 Near-stream 07 piezometer nest 3.4.3 Lower slope TD4 mini-piezometer nest Chapter 4 Preferential flowpathways: Results and discussion 4.1. Discharge contributions to streamflow during runoff events 4.2. Assessment of the origin of water emmitted from the soil pipes during runoff events Chapter 5 Conclusions References Appendix I Appendix II Appendix Ill Appendix IV Appendix V , Englisch
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  • 95
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Boulder, Colo. : Geological Society of America
    Dazugehörige Bände
    Signatur: S 90.0095(246)
    In: Special paper / The Geological Society of America, 246
    Materialart: Schriftenreihen ausleihbar
    Seiten: VII, 364 Seiten , Illustrationen, graphische Darstellungen, Karten , 28 cm
    ISBN: 0-8137-2246-2
    Serie: Special paper / The Geological Society of America 246
    Sprache: Englisch
    Anmerkung: Preface Introduction Magmatic and hydrothermal processes in ore-bearing systems Judith L. Hannah and Holly J. Stein Theoretical and Experimental Studies Theoretical contraints on the chemistry of the magmatic aqueous phase Philip A. Candela Partitioning of F and Cl between magmatic hydrothermal fluids and highly evolved granitic magma James D. Webster and John R. Holloway Internal differentiation of rare-element pegmatites; A synthesis of recent research David London Fluorine-rich Granite-Rhyolite Systems The petrogenetic and metallogenetic significance of topaz granite from the southwest England orefield D.A.C. Manning and P. I. Hill The role of fluorine in the petrogenesis of magmatic segregations in the SL Francois volcano-plutonic terrane, southeastern Missouri P. I. Nabelek and C. Russ-Nabelek Melt inclusions in the quartz phenocrysts of rhyolites from Topaz and Keg Mountains, Thomas Range, Utah Christine Payette and Robert F. Martin Rare-metal enriched peralumininous rhyolites in a continental arc, Sierra Bianca area, Trans-Pecos Texas; Chemical modification by vapor-phase crystallization Jonathan G. Price, Jeffrey N. Rubin, Christopher D. Henry, Thomas L. Pinkston, Steven W. Tweedy, and David W. Koppenaal Tin and Tungsten-bearing Granitoids Comparative petrologic evolution of the Sn and W granites of the Fairbanks-Circle area, interior Alaska R. J. Newberry, L. E. Bums, S. E. Swanson, and T. E. Smith Mineralogical variation as a guide to the petrogenesis of the tin granites and related skarns, Seward Peninsula, Alaska Samuel E. Swanson, Rainer J. Newberry, Gary A. Coulter, and Thomas M. Dyehouse Geochemistry of highly fractionated I- and S-type granites from the tin-tungsten province of western Tasmania W. N. Sawka, M. T. Heizler, R. W. Kistler, and B. W. Chappell Genesis and fluid evolution of the East Kemptville greisen-hosted tin mine, southwestern Nova Scotia, Canada Jean M. Richardson, Keith Bell, David H. Watkinson, and John Blenkinsop Mica chemistry as an indicator of oxygen and halogen fugacities in the CanTung and other W-related granitoids in the North American Cordillera W. T. van Middelaar and J. D. Keith The Black Pearl mine, Arizona; Wolframite veins and stockscheider pegmatite related to an albitic stock Christopher Schmitz and Donald M. Burt Tin-bearing Rhyolites, Black Range, New Mexico Genesis of the rhyolite-hosted tin occurrences in the Black Range, New Mexico, as indicated by stable isotope studies Robert O. Rye, John L. Lufkin, and Michael D. Wasserman Eruptive fountains of silicic magma and their possible effects on the tin content of fountain-fed lavas, Taylor Creek Rhyolite, New Mexico Wendell A. Duffield Origin of Taylor Creek rhyolite magma, Black Range, New Mexico, based on Nd-Sr isotope studies Cadi Reece, Joaquin Ruiz, Wendell A. Duffield, and P. Jonathan Patchett Other Pre-Tertiary Granitoid Examples Petrogenesis of the Proterozoic rapakivi granites of Finland Ilmari Haapala and O. Tapani Rämö The Topsails igneous suite, western Newfoundland; Fractionation and magma mixing in an "orogenic" A-type granite suite Joseph B. Whalen and Kenneth L. Currie Anorogenic, bimodal emplacement of anorthositic, charnockitic, and related rocks in the Adirondack Mountains, New York James McLelland and Philip Whitney Geochemistry and metallogeny of Arizona peraluminous granitoids with reference to Appalachian and European occurrences Anne L. Shaw and John M. Guilbert Index
    Standort: Kompaktmagazin unten
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  • 96
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Boulder, Colo. : Geological Society of America
    Dazugehörige Bände
    Signatur: S 90.0095(268)
    In: Special paper / The Geological Society of America, 268
    Materialart: Schriftenreihen ausleihbar
    Seiten: ix, 406 Seiten , illustrationen, Karten , 28 cm
    ISBN: 0-8137-2268-3
    Serie: Special paper / The Geological Society of America 268
    Sprache: Englisch
    Standort: Kompaktmagazin unten
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  • 97
    Monographie ausleihbar
    Monographie ausleihbar
    Waterloo, Ont. : University of Waterloo
    Signatur: AWI G6-23-95002
    Materialart: Monographie ausleihbar
    Seiten: xx, 214 Seiten , Illustrationen
    Sprache: Englisch
    Anmerkung: Masterarbeit, University of Waterloo, 1990 , TABLE OF CONTENTS Abstract Acknowledgements List of figures List of tables List of plates preamble CHAPTER 1: INTRODUCTION 1.1 PURPOSE AND SCOPE 1.2 LOCATION AND CLIMATE 1.3 GEOLOGICAL SETTING 1.3.1 Bedrock geology 1.3.2 Glacial history 1.3.2 Surficial geology 1.4 PREVIOUS RESEARCH AND PARALLEL STUDIES 1.5 SITE INVESTIGATIONS 1.5.1 Introduction 1.5.2 Water sampling methods 1.5.3 Piezometer methods 1.5.4 Measuring hydraulic conductivity 1.S.S Surface flow monitoring 1.5.6 Seepage meters 1.5.7 Coring and porewater squeezing 1.5.8 Frost table probing 1.5.9 Geological mapping 1.5.10 Weather records 1.5.11 Depth sounding 1.6 ANALYTICAL METHODS AND LABORATORY INVESTIGATIONS 1.6.1 Sample collection, filtration, and alkalinity 1.6.2 Analytical methods 1.6.3 Quality of chemical analyses 1.6.4 Grain-size distributions and organic matter contents in till 1.6.5 Core logging and porewater squeezing 1.6.6 SEM examination of mineral weathering CHAPTER 2: HYDROLOGY AND HYDROGEOLOGY synopsis 2.1 INTRODUCTION 2.2 LOCATION AND CLIMATE 2.3 FIELD AND ANALYTICAL METHODS 2.3.1 Field methods 2.3.2 Analytical methods 2.4 SETTING 2.5 HYDROLOGY 2.5.1 Surface hydrology 2.5.2 Groundwater hydrology 2.5.2.1 Thawing of the active layer 2.5.2.2 Structure and composition of the active layer till 2.5.2.3 Groundwater flow 2.6 DISCUSSION 2.7 CONCLUSIONS CHAPTER 3: A PRELIMINARY ASSESSMENT OF ISOTOPE HYDROLOGY AND GEOCHEMISTRY abstract 3.1 INTRODUCTION 3.2 STUDY AREA 3.3 ANALYTICAL METHODS 3.4 VEGETATION AND ACTIVE LAYER PROPERTIES 3.5 STABLE ISOTOPE DATA 3.6 WATER CHEMISTRY 3.7 SUMMARY CHAPTER 4: ISOTOPIC ANALYSIS OF EVAPORATION synopsis 4.1 INTRODUCTION 4.2 STUDY AREA 4.3 FIELD AND LABORATORY METHODS 4.3.1 Materials and field methods 4.3.2 Analytkal methods 4.4 THEORY 4.4.1 Theoretical development 4.4.2 Basis of this approach 4.5 PRESENTATION AND ANALYSIS OF DATA 4.6 DISCUSSION OF RESULTS 4.7 CONCLUSIONS CHAPTER 5: WATER BALANCE AND GEOCHEMICAL EVALUATIONS abstract 5.l INTRODUCTION 5.2 SETTING 5.3 ANALYTICAL METHODS 5.4 HYDROLOGY 5.5 WATER BALANCE CALCULATIONS 5.6 GEOCHEMISTRY 5.7 DISCUSSION 5.8 CONCLUSIONS CHAPTER 6: CONCLUSIONS AND RECOMMENDATIONS 6.1 SUMMARY OF CONCLUSIONS 6.2 RECOMMENDATIONS FOR FUTURE RESEARCH References LIST OF APPENDICES A. Part A: Stable isotope analyses of water samples Part B: Tritium analyses Part C: Field geochemical measurements Part D: Major ion analyses of water samples B. GROUNDWATER SAMPLING FROM PIEZOMETERS C. RELIABILITY OF Eh MEASUREMENTS D. PIEZOMETER DESIGNS/INSTALLATION PROCEDURES Part A: 1988 Part B: 1989 E. HYDRAULIC CONDUCTIVITY TESTING/DATA F. SURFACE FLOW MEASUREMENTS Part 1: Weir Part 2: Stream gauging G. SEEPAGE METER METHODS AND MEASUREMENTS H. CORING AND SQUEEZING METHODS I. CORE AND SOIL PIT DESCRIPTIONS J. LABORATORY INVESTIGATIONS TO ADDRESS WATER QUALITY Part A: Duplicates, blanks, and comparative analyses Part B: Filtration experiment Part C: Dissolved organic carbon Part D: Carbon-13 K. CHEMICAL AND ISOTOPIC ANALYSES OF POREWATERS EXTRACTED FROM CORES L. SCANNING ELECTRON MICROSCOPY OF TILL M. WATER BALANCE THEORY
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  • 98
    Signatur: AWI G6-23-95004
    Materialart: Monographie ausleihbar
    Seiten: vii, 100 Seiten , Illustrationen
    Sprache: Englisch
    Anmerkung: Bachelorarbeit, Wilfrid Laurier University, 1993 , TABLE OF CONTENTS Chapter 1 Introduction Chapter 2 Literature Review 2.1 Introduction 2.2 Water Balance 2.3 Nutrient Inputs 2.4 Models Chapter 3 Study Site and Site Characteristics 3.1 Study Site Location 3.2 Geology 3.3 Surface Cover 3.4 Permafrost Depth 3.5 Lake Formation 3.6 Lake Characteristics 3.7 Lake Sub Basin Characteristics 3.8 Climate 3.9 Precipitation and Melt 3.10 Evaporation Chapter 4 Methods 4.1 Introduction 4.2 Physical Sampling 4.2.1 Water Level 4.2.2 Stream Discharge 4.2.3 Precipitation 4.2.4. Radiation 4.2.5 Evaporation 4.2.6 Groundwater 4.3 Chemical Sampling 4.3.1 Total Phosphorus 4.4 Biological Sampling 4.4.1 Chlorophyll a 4.5 Water Balance 4.6 Nutrient Inputs 4.7 Models 4.7.1 Predicting Total Phosphorus Concentrations 4.7.2 Chlorophyll a Chapter 5 Results 5.1 Introduction 5.2 Water Balance 5.2.1 Lake Storage 5.2.2 Stream Discharge 5.2.3 Precipitation 5.2.4 Radiation 5.2.5 Evaporation 5.2.6 Groundwater 5.3 Nutrient Inputs 5.4 Models 5.4.1 Predicting Total Phosphorus Concentrations 5.4.2 Chlorophyll a Chapter 6 Discussion 6.1 Introduction 6.2 Water Balance 6.3 Nutrient Inputs 6.4 Models Chapter 7 Further Study Appendices Appendix 1 Lake Storage Appendix 2 Discharge Data Appendix 3 Precipitation Appendix 4 Radiation Appendix 5 Evaporation Appendix 6 Nutrient Data Appendix 7 Chlorophyll a Bibliography , Englisch
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  • 99
    Monographie ausleihbar
    Monographie ausleihbar
    Anchorage, Alas. : Bureau of Land Management, Alaska State Office | Anchorage, Alas. : Alaska Natural History Association
    Signatur: AWI G3-23-95156
    Materialart: Monographie ausleihbar
    Seiten: 128 Seiten , Illustrationen, Karten , 27 cm
    ISBN: 0930931106 , 0-930931-10-6
    Sprache: Englisch
    Anmerkung: Contents Foreword Introduction Oil - Catalyst for change The Haul Road - Highway to the Arctic Origins: The geologic setting Glaciers shape the land Glaciation and wildlife distribution Permafrost and the periglacial environment The Dalton Highway road log Glossary Selected references
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  • 100
    Dissertationen
    Dissertationen
    Wageningen : Landbouwuniversiteit Wageningen
    Signatur: AWI G3-23-95005
    Beschreibung / Inhaltsverzeichnis: In this thesis processes and parameters associated with heat and mass transfer in frozen porous media both on a theoretical and empirical basis are studied. To obtain the required measurements some existing measuring methods needed to be improved. Firstly, an improved model has been developed for the measurement of thermal conductivity with use of the nonsteady-state probe method. The measurements of thermal conductivity indicate four separate effects caused by the freezing process. The second improved measuring method is the measurement of bulk electrical conductivity with use of time-domain r e flectometry. And the third improvement is the use of the dispersion theory in the description of relations between water content and bulk electrical conductivity or dielectric constant. This thesis shows that time-domain reflectometry can be used to measure the unfrozen water content and bulk electrical conductivity simultaneously under frozen conditions and that from the latter parameter solute redistribution can be monitored. From the measured heat flows a time delay in the forming of pore ice can be concluded. From the measured moisture transport (resulting in frost heave) a relation with some soil properties could be established. For some of the materials studied a minimum temperature gradient has been observed at which heave starts . From this and other results an effort was made to come to a synthesis of the rigid ice concept and the segregation potential concept. The thesis finishes with some recommandations in connection with the improvement of soil structure by freezing, frost heave and artificial ground freezing.
    Materialart: Dissertationen
    Seiten: 8, 204 Seiten , Illustrationen
    Sprache: Englisch
    Anmerkung: Dissertation, Landbouwuniversiteit Wageningen, Wageningen, 1991 , 1 INTRODUCTION 1.1 Fields of interest 1.2 Macroscopic freezing test 1.3 Microscopic model 1.4 Aim of the thesis 1.5 Overview of the thesis 2 THEORY 2.0 Introduction to the chapter 2.1 Theory of different soil analyses 2.1.1 Particle size distribution 2.1.2 Specific surface area 2.1.3 Cation exchange capacity 2.1.4 Zeta potential 2.1.5 Water retention 2.1.6 Hydraulic conductivity 2.1.7 Thermal conductivity 2.2 Determination of soil water content by time-domain reflectometry 2. 2.1 Transmission line theory 2.2.2 Water content 2.2.3 Bulk electrical conductivity 2.3 Transfer of heat and mass 2.3.1 Moisture transport 2.3.2 Heat transport 2.3.3 Solute transport 3 NEW MODELS AND METHODS 3.0 Introduction to the chapter 3.1 A new model for the nonsteady-state probe method to measure thermal properties of porous media 3.1.0 Abstract 3.1.1 Introduction 3.1.2 Present approach 3.1.3 Experimental set-up 3.1.4 The perfect line source model 3.1.5 The modified Jaeger model 3.1.6 Gauss-Newton iteration 3.1.7 Calibration measurements 3.1.8 Conclusions 3.2 A new method to measure bulk electrical conductivity in soil using time-domain reflectometry 3.2.0 Abstract 3.2.1 Introduction 3.2.2 Measurement theory 3.2.3 Materials and methods 3.2.4 Results and discussion 3.2.5 Conclusions 3.3 Application of dispersion theory to time-domain reflectometry in soils 3.3.0 Abstract 3.3.1 Introduction 3.3.2 Dielectric constant as a function of water content 3.3.2.1 Soil as a two phase dielectric medium 3.3.2.2 Unfrozen soils 3.3.2.3 Frozen soils 3.3.3 Bulk electrical conductivity as a function of water content 3.3.4 Materials and methods 3.3.5 Results and discussion 3.3.5.1 Validation of the model for bulk electrical conductivity 3.3.5.2 Comparison with other models 3.3.6 Conclusions 3.3.7 Appendix 3.4 Description of the experiments to measure heat and mass transfer in freezing porous media 3.4.1 Experimental set-up 3.4.2 Used materials 3.4.3 Relations between soil physical and electrochemical properties 4 RESULTS AND DISCUSSION 4.0 Introduction to the chapter 4.1 Thermal conductivity of unsaturated frozen sands 4. 1.0 Abstract 4.1. 1 Introduction 4.1. 2 Experimental set-up 4.1. 3 Theoretical approach 4. 1.4 Properties of the used sands 4.1.5 Measured heat flows 4.1. 6 Measured thermal conductivities 4.1. 7 Discussion 4.2 Heat transfer 4.2.1 Heat capacity 4.2.2 Thermal conductivity 4.2.2.1 Influence of the temperature dependence of the pore ice versus unfrozen water content 4.2.2.2 Contribution of the apparent thermal conductivity 4.2.2.3 Segregated ice content 4.2.2.4 Presence of the freezing front close to the measuring probe 4.2.3 Latent heat of in situ freezing 4.2.4 Heat balances 4.2.5 Temperature fields 4.2.6 Dynamics of heat flows in frozen porous materials 4.3 Moisture transfer 4.3.1 Segregation potential 4.3.2 Influence of soil physical and electrochemical properties 4.4 Application of time-domain reflectometry to measure solute concentration during soil freezing 4.4.0 Abstract 4.4.1 Introduction 4.4.2 Materials and methods 4.4.3 Results and discussion 4.4.3.1 Influence of temperature 4.4.3.2 Influence of liquid water content 4.4.3.3 Redistribution of solutes 4.4.4 Conclusions 4.5 Influence of added solutes on moisture transfer 5 CONCLUSIONS AND FINAL DISCUSSION 5.1 General discussion 5.2 Recommandations in connection with frost in porous media , Zusammenfassung in niederländischer Sprache
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