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  • 1
    Keywords: Natural disasters. ; Geotechnical engineering. ; Geology. ; Geographic information systems. ; Climatology. ; Geodynamics. ; Natural Hazards. ; Geotechnical Engineering and Applied Earth Sciences. ; Geology. ; Geographical Information System. ; Climate Sciences. ; Geodynamics.
    Description / Table of Contents: Part I: ICL Landslide Lesson -- Advancements in shear strength interpretation, testing, and use for landslide analysis -- Rock Avalanches in the Tibet Plateau of China -- Part II: Original articles -- Landslide Susceptibility Zonation Using GIS-based Frequency Ratio Approach in the Kulon Progo Mountains Area, Indonesia -- Physically-based regional landslide forecasting modelling: model set-up and validation -- Consequence - frequency matrix as a tool to assess landslides risk -- Do not let your guard down: landslide exposure and local awareness in Mexico -- Landslides in Higher Education Curricula and Beyond -- Community Scale Landslide Resilience: A citizen-science approach -- Remedial Measures Impact on Slope Stability and Landslide Occurrence in Small-Scale Slope Physical Model in 1g Conditions -- Surficial geology and geomorphology of the North Slide, Thompson River valley, British Columbia: application of fundamental geoscience information to interpretations of geospatial monitoring results -- High Resolution Numerical Weather Simulation for Orographic Precipitation as an Accurate Early Warning Tool for Landslide Vulnerable Terrains -- Climate Change as Modifier of Landslide Susceptibility: Case Study in Davao Oriental, Philippines -- Fractal-based evaluation of the spatial relationship between conditioning factors and the distribution of landslides (A case study in Tinh Tuc, Cao Bang province, Vietnam) -- Procedure of Data Processing for the Improvement of Failure Time of a Landslide Based on the Velocity and Acceleration of the Displacement -- Numerical analysis of the effect of rainfall on the stability of sandstone-covered mudstone cutting slopes -- Part III: Review articles -- Post-formation behaviour of Hattian Landslide Dam and post-breaching situation -- Investigation of debris flow impact mechanisms and designs -- A review of the disaster risk assessment perspectives -- Part IV: IPL/WCOE/KLC2020 -- Application of LAND-SUITE for landslide susceptibility modelling using different mapping units. A case study in Croatia -- An Integrated approach to landslides risk management for local and national authorities -- Assessing landslide hazard in the High City of Antananarivo, Madagascar (UNESCO Tentative site) -- Part V: ICL Landslide Teaching Tools -- Teaching Tools for LS-Tsnnamis -- Part VI: Technical Notes and Case Studies -- CliRtheRoads – An integrated approach to landslide risk management on roads in Serbia -- Part VII: World Landslide Reports -- Rock slope instabilities affecting the AlUla archaeological sites (KSA) -- Refugees’ perception of landslide disasters: Insights from the Rohingya camps in Cox’s Bazar, Bangladesh.
    Abstract: This open access book provides an overview of the progress in landslide research and technology and is part of a book series of the International Consortium on Landslides (ICL). It gives an overview of recent progress in landslide research and technology for practical applications and the benefit for the society contributing to understanding and reducing landslide disaster risk. Prof. Irasema Alcántara-Ayala is a former Director and current Professor at the Institute of Geography of the National Autonomous University of Mexico (UNAM). She is a member of the UNDRR R-STAG of the Americas and an Editor of the ICL book series P-LRT. Prof. Željko Arbanas is the Vice President of the ICL for Europe. He is a professor at the Faculty of Engineering, University of Rijeka, Croatia. He is an Assistant Editor-in-Chief of the International Journal Landslides and the ICL book series P-LRT. Dr. David Huntley is Research Scientist with the Geological Survey of Canada and Open Learning Faculty at Thompson Rivers University, British Columbia. He is an Editor of the ICL book series P-LRT. Prof. Kazuo Konagai is a Professor Emeritus at the University of Tokyo and Principal Researcher of the ICL headquarters. He is an Assistant Editor-in-Chief of the ICL book series P-LRT. Prof. Snježana Mihalić Arbanas a Professor of the Faculty of Mining, Geology and Petroleum, University of Zagreb in Croatia. She is the Chair of ICL Network Committee. Matjaž Mikoš, Professor at the Faculty of Civil and Geodetic Engineering, University of Ljubljana, Slovenia, is the Chairman of the Global Promotion Committee of the International Programme on Landslides and Kyoto Landslide Commitment 2020. Dr. Maneesha Vinodini Ramesh is the Provost of Amrita Vishwa Vidyapeetham, Dean, School for Sustainable Development, Director, AMRITA Center for Wireless Networks & Applications, Amrita Vishwa Vidyapeetham, India. She is an Editor of the ICL book series P-LRT. Prof. Kyoji Sassa is the Founding President and the Secretary General of the ICL and the Secretary General of the Kyoto Landslide Commitment 2020. He is the Editor-in-Chief of the International Journal Landslides and the ICL book series P-LRT. Dr. Shinji Sassa is the Head of Soil Dynamics Group and Research Director at Port and Airport Research Institute, National Institute of Maritime, Port and Aviation Technology, Japan. He is an Editor of the International Journal Landslides and the ICL book series P-LRT. Prof. Huiming Tang is the Vice President of China University of Geosciences (Wuhan) and a Chief Professor at the Faculty of Engineering. He is a full member of ICL, Chairman of the Engineering Geology commission of China and Vice President of IAEG. Prof. Binod Tiwari is the Vice President of the ICL for America. He is a professor of civil and environment engineering at the California State University, Fullerton California, USA. He is an Assistant Editor-in-Chief of the ICL book series P-LRT.
    Type of Medium: Online Resource
    Pages: XV, 503 p. 415 illus., 402 illus. in color. , online resource.
    Edition: 1st ed. 2023.
    ISBN: 9783031442964
    Series Statement: Progress in Landslide Research and Technology,
    DDC: 551
    Language: English
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  • 2
    Keywords: Natural disasters. ; Geomorphology. ; Geotechnical engineering. ; Natural Hazards. ; Geomorphology. ; Geotechnical Engineering and Applied Earth Sciences.
    Description / Table of Contents: Part I: ICL Landslide Lesson -- Sliding-surface liquefaction and undrained steady-state shear strength -- Identification and Mitigation of Reservoir Landslides Cases Studied in the Three Gorges Reservoir Area of China -- Part II: Original articles -- Impact of input data on the quality of the landslide susceptibility large-scale maps: A case study from NW Croatia -- Landslide warning systems in high-income countries: past accomplishments and expected endeavours -- Modelling of Landslide-Structure Interaction (LSI) through Material Point Method (MPM) -- Landslide Research and Technology in International Standards -- Mathematical and numerical modeling of slope stability for the Mong Sen landslide event in the Trung Chai commune, Sapa, Vietnam -- Landslide early warning system based on the empirical approach - Case study in Ha Long City (Vietnam) -- The modern activity of the Buzulgan landslide and its influence on the debris flow hazard for the Tyrnyauz town (Northern Caucasus, Russia) -- A risk evaluation method of unstable slopes using multipoint tilting sensors -- Part III: IPL/WCOE/KLC2020 -- Community Level Slope Disaster Risk Reduction Program through Multi-Scale Mapping by Mountain Ethnic Group in Northern Vietnam - Project Study by JICA / Lao Cai DARD / ITST -- Landslide Risk Assessment in the tropical zone of Vietnam as a contribution to the mitigation of natural disaster vulnerability -- Protection and conservation of Georgian rupestrian cultural heritage sites: a review -- Spatial and temporal characterization of landslide deformation pattern with Sentinel-1 -- Lessons from 2019-2020 landslide risk assessment in an urban area of volcanic soils in Pereira-Colombia -- Part IV: ICL Landslide Teaching Tools -- Zonation of landslide susceptibility in the Gipuzkoa province (Spain): an application of LAND-SUITE -- Landslide and soil erosion inventory mapping based on high-resolution remote sensing data: A case study from Istria (Croatia) -- Part V: Technical Notes and Case Studies -- Landslide monitoring with RADARSAT Constellation Mission InSAR, RPAS-derived point-clouds and RTK GNSS time-series in the Thompson River Valley, British Columbia, Canada -- Digital terrain models derived from unmanned aerial vehicles and landslide susceptibility -- Use of GIS to assess susceptibility per landform unit to gravitational processes and their volume.
    Abstract: This open access book provides an overview of the progress in landslide research and technology and is part of a book series of the International Consortium on Landslides (ICL). It gives an overview of recent progress in landslide research and technology for practical applications and the benefit for the society contributing to understanding and reducing landslide disaster risk. Prof. Irasema Alcántara-Ayala is a former Director and current Professor at the Institute of Geography of the National Autonomous University of Mexico (UNAM). She is a member of the UNDRR R-STAG of the Americas and an Editor of the ICL book series P-LRT. Prof. Željko Arbanas is the Vice President of the ICL for Europe. He is a professor at the Faculty of Engineering, University of Rijeka, Croatia. He is an Assistant Editor-in-Chief of the International Journal Landslides and the ICL book series P-LRT. Prof. Sabatino Cuomo Sabatino Cuomo is a Professor of Geotechnical Engineering at the University of Salerno and Coordinator of LARAM School (International School on “LAndslide Risk Assessment and Mitigation) for Ph.D. students. He is an Editor of the ICL book series P-LRT. Dr. David Huntley is Research Scientist with the Geological Survey of Canada and Open Learning Faculty at Thompson Rivers University, British Columbia. He is an Editor of the ICL book series P-LRT. Prof. Kazuo Konagai is a Professor Emeritus at the University of Tokyo and Principal Researcher of the ICL headquarters. He is an Assistant Editor-in-Chief of the ICL book series P-LRT. Prof. Snježana Mihalić Arbanas a Professor of the Faculty of Mining, Geology and Petroleum, University of Zagreb in Croatia. She is the Chair of ICL Network Committee. Matjaž Mikoš, Professor at the Faculty of Civil and Geodetic Engineering, University of Ljubljana, Slovenia, is the Chairman of the Global Promotion Committee of the International Programme on Landslides and Kyoto Landslide Commitment 2020. Prof. Kyoji Sassa is the Founding President and the Secretary General of the ICL and the Secretary General of the Kyoto Landslide Commitment 2020. He is the Editor-in-Chief of the International Journal Landslides and the ICL book series P-LRT. Dr. Shinji Sassa is the Head of Soil Dynamics Group and Research Director at Port and Airport Research Institute, National Institute of Maritime, Port and Aviation Technology, Japan. He is an Editor of the International Journal Landslides and the ICL book series P-LRT. Prof. Huiming Tang is the Vice President of China University of Geosciences (Wuhan) and a Chief Professor at the Faculty of Engineering. He is a full member of ICL, Chairman of the Engineering Geology commission of China and Vice President of IAEG. Prof. Binod Tiwari is the Vice President of the ICL for America. He is a professor of civil and environment engineering at the California State University, Fullerton California, USA. He is an Assistant Editor-in-Chief of the ICL book series P-LRT.
    Type of Medium: Online Resource
    Pages: XIII, 482 p. 408 illus., 395 illus. in color. , online resource.
    Edition: 1st ed. 2023.
    ISBN: 9783031390128
    Series Statement: Progress in Landslide Research and Technology,
    DDC: 551
    Language: English
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  • 3
    Keywords: Natural disasters. ; Geomorphology. ; Geotechnical engineering. ; Natural Hazards. ; Geomorphology. ; Geotechnical Engineering and Applied Earth Sciences.
    Description / Table of Contents: Chapter 1. Editorial of the new open access book series “Progress in Landslide Research and Technology” (Kyoji Sassa) -- Part I. Original Articles -- Chapter 2. Key Techniques of Prevention and Control for Reservoir Landslide Based on Evolutionary Process (Huiming Tang) -- Chapter 3. Landslide research and technology in patent documents (Matjaž Mikoš) -- Chapter 4. Scalable Platform for UAV Flight Operations, Data Capture, Cloud Processing and Image Rendering of Landslide Hazards and Surface Change Detection for Disaster-Risk Reduction (David Huntley) -- Chapter 5. Ongoing persistent slope failures at the toe of a giant submarine slide in the Ryukyu Trench that generated the AD 1771 Meiwa tsunami (Kiichiro Kawamura) -- Chapter 6. Experimental simulation of landslide creep in ring shear machine (Netra Prakash Bhandary) -- Chapter 7. Assessment of the effects of rainfall frequency on landslide susceptibility mapping using AHP method: a case study for a mountainous region in central Vietnam (Chi Cong Nguyen) -- Chapter 8. Suffosion landslides as a specific type of slope deformations in the European part of Russia (Oleg V. Zerkal) -- Chapter 9. In situ triaxial creep test on gravelly slip zone soil of a giant landslide: innovative attempts and findings (Qinwen Tan) -- Chapter 10. Challenges and lessons learned from heavy rainfall induced geo-disasters over the last decade in Kyushu Island, Japan (Noriyuki Yasufuku).
    Abstract: This open access book provides an overview of the progress in landslide research and technology and is part of a book series of the International Consortium on Landslides (ICL). It gives an overview of recent progress in landslide research and technology for practical applications and the benefit for the society contributing to understanding and reducing landslide disaster risk. Prof. Irasema Alcántara-Ayala is a former Director and current Professor at the Institute of Geography of the National Autonomous University of Mexico (UNAM). She is a member of the UNDRR R-STAG of the Americas and an Editor of the ICL book series P-LRT. Prof. Željko Arbanas is the Vice President of the ICL for Europe. He is a professor at the Faculty of Engineering, University of Rijeka, Croatia. He is an Assistant Editor-in-Chief of the International Journal Landslides and the ICL book series P-LRT. Dr. David Huntley is Research Scientist with the Geological Sur vey of Canada and Open Learning Faculty at Thompson Rivers University, British Columbia. He is an Editor of the ICL book series P-LRT. Prof. Kazuo Konagai is a Professor Emeritus at the University of Tokyo and Principal Researcher of the ICL headquarters. He is an Assistant Editor-in-Chief of the ICL book series P-LRT. Matjaž Mikoš, Professor at the Faculty of Civil and Geodetic Engineering, University of Ljubljana, Slovenia, is the Chairman of the Global Promotion Committee of the International Programme on Landslides and Kyoto Landslide Commitment 2020. Prof. Kyoji Sassa is the Founding President and the Secretary General of the ICL and the Secretary General of the Kyoto Landslide Commitment 2020. He is the Editor-in-Chief of the International Journal Landslides and the ICL book series P-LRT. Dr. Shinji Sassa is the Head of Soil Dynamics Group and Research Director at Port and Airport Research Institute, National Institute of Maritime, Port and Aviation Technology, Japan. He is an Editor of the International Journal Landslides and the ICL book series P-LRT. Prof. Huiming Tang is the Vice President of China University of Geosciences (Wuhan) and a Chief Professor at the Faculty of Engineering. He is a full member of ICL, Chairman of the Engineering Geology commission of China and Vice President of IAEG. Prof. Binod Tiwari is the Vice President of the ICL for America. He is a professor of civil and environment engineering at the California State University, Fullerton California, USA. He is an Assistant Editor-in-Chief of the ICL book series P-LRT.
    Type of Medium: Online Resource
    Pages: XVI, 475 p. 435 illus., 416 illus. in color. , online resource.
    Edition: 1st ed. 2023.
    ISBN: 9783031184710
    Series Statement: Progress in Landslide Research and Technology,
    DDC: 551
    Language: English
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 21 (1983), S. 0 
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: Warm Springs Valley, located in northwestern Virginia, is characterized by the discharge of springs from cavernous limestone at temperatures up to 40°C, although the measured geothermal gradient is a normal 10°C/km. The area is therefore hypothesized to be an important example of a situation where thermal convection is sufficient to produce high-temperature surface waters. A finite-difference numerical model was constructed to simulate the simultaneous transport of heat and fluid under combined forced and free convection conditions. This model was used to test the hypothesized heat flow system for Warm Springs Valley.The results of the testing show that, within the hydrogeological constraints found at Warm Springs Valley, convection with a normal geothermal gradient is capable of producing 40°C hot springs. The conditions required a zone of enhanced vertical hydraulic conductivity in the area of ground-water discharge and a deep zone of enhanced horizontal hydraulic conductivity. The enhanced zones are consistent with the geology found in the basin.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 38 (2000), S. 0 
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: Hydrocarbon baildown tests involve the rapid removal of floating hydrocarbon from an observation or production well, followed by monitoring the rate of recovery of both the oil/air and oil/water interfaces. This test has been used erroneously for several years to calculate the “true thickness” of hydrocarbon in the adjacent formation. More recent analysis of hydrocarbon distribution by Farr et al. (1990), Lenhard and Parker (1990), Huntley et al. (1994), and others have shown that, under vertical equilibrium conditions, there is no thickness exaggeration of hydrocarbon in a monitoring well, though there is a significant volume exaggeration. This body of work can be used to demonstrate that the calculation of a “true hydrocarbon thickness” using a baildown test has no basis in theory. The same body of work, however, also demonstrates that hydrocarbon saturations are typically much less than one, and are often below 0.5. Because the relative permeability decreases as hydrocarbon saturation decreases, the effective conductivity and mobility of the hydrocarbon is much less than that of water, even ignoring the effects of increased viscosity and decreased density.It is important to evaluate this decreased mobility of hydrocarbon due to partial pore saturation, as it has substantial impacts on both risk and remediation. This paper presents two analytic approaches to the analysis of hydrocarbon baildown test results to determine hydrocarbon transmissivity. The first approach is based on a modification of the Bouwer and Rice (1976) analysis of slug withdrawal test data. The second approach is based on a modification of Jacob and Lohman's (1952) constant drawdown—variable discharge aquifer test approach. The first approach can be applied only when the effective water transmissivity across the screened interval to water is much greater than the effective hydrocarbon transmissivity. When this condition is met, the two approaches give effectively identical results.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 31 (1993), S. 0 
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: The design of vapor-extraction remedial systems and the analysis of their performance can be improved by using models that can simulate the chemical and physical processes affecting the occurrence and movement of multiple-compound vapor-phase chemical mixtures. Previous models fall into two categories: (1) multiple-compound phase distribution models which are either nondimensional (no transport) or one-dimensional (column experiments); and (2) multidimensional, single-compound transport models. In this paper, a model is presented that couples the steady-state vapor flow equation, the advection-diffusion transport equation, and a multiple-compound, multiphase chemical partitioning model. The numerical implementation allows spatially variable fields of permeability, confining layer permeability, and initial contaminant concentrations. Based on the concentrations of each chemical compound, the model calculates whether a nonaqueous phase liquid (NAPL) is present, and calculates the chemical phase distribution by the appropriate equilibrium partitioning formulation (Henry's Law or Raoult's Law).The user can specify the location and discharge rates of any number of extraction or injection wells, including zero wells, in which case the simulation will solve transport by diffusion only. The remediation, by vapor extraction, of hypothetical fuel hydrocarbon spills was simulated to investigate the error introduced by failing to account for natural (nonideal) conditions. The nonideal conditions include inhomogeneous soil permeability, leakage of atmospheric air into the subsurface (as from a bare ground surface), and irregular contaminant distribution. The model was also run in the pure diffusion mode to simulate the transport of benzene to the ground surface, and to show the limitations of single-compound vapor flux models when a multicompound NAPL (such as gasoline) represents the source of benzene.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 24 (1986), S. 0 
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: Increased demand for quantitative answers to ground-water problems, particularly associated with the use of numerical models, has increased the need to accurately determine the distribution of hydraulic parameters. Researchers have attempted to find correlations between electrical resistivity and the permeability of fresh-water aquifers since 1951. Several recent studies report either direct or inverse relations between apparent formation factor and aquifer permeability. The basis for these relations is a direct or inverse relation between porosity and permeability and, as matrix conduction effects are not taken into account, constant fluid conductivity is either implicitly or explicitly assumed.Laboratory experiments conducted on granular materials suggest that matrix conduction (surface conduction) effects are either as important as, or dominant over, porosity-permeability relations. Our experiments on granular materials show only weak relations between true formation factor and permeability. Relations between apparent formation factor and permeability are good only for constant fluid conductivity. Most importantly, the strongest relationship found was that between permeability and matrix conductivity.These data suggest either that (1) relations between permeability and apparent formation factor must be applied in very restricted geologic environments and only where fluid conductivity remains relatively constant, or (2) more fundamental relations between matrix conductivity and aquifer permeability should be applied.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 29 (1991), S. 0 
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: Transmissivity is often estimated from specific capacity data because of the expense of conducting standard aquifer tests to obtain transmissivity and the relative availability of specific capacity data. Most often, analytic expressions relating specific capacity to transmissivity derived by Thomasson and others (1960), Theis (1963), or Brown (1963) are used in this analysis. This paper focuses on a test of these relations using a large (215 pairs) data set from a heterogeneous aquifer.The analytic solutions predicting transmissivity from specific capacity do not agree well with the measured transmissivities, apparently due to turbulent well loss within the production wells, which is not taken into account by any of the analytic solutions. Empirical relations are better than the theoretical relations. Log-log functions have greater correlation coefficients than linear functions. The best relation found for the data set chosen for this study has a correlation coefficient of 0.63, but the prediction interval was about 1.2 log cycles, indicating that the range of probable transmissivities corresponding to a single specific capacity was more than one order of magnitude. Tests with smaller subsets of data suggest that correlations based on data sets of 10 points or less are of limited value.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 30 (1992), S. 0 
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: Transmissivity is often estimated from specific capacity data because of the expense of conducting standard aquifer tests to obtain transmissivity and the relative availability of specific capacity data. Most often, analytic expressions relating specific capacity to transmissivity derived by Thomasson and others (1960), Theis (1963), or Brown (1963) are used in this analysis. Razack and Huntley (1991) demonstrate that turbulent well loss produces poor correlation between measured transmissivities and those estimated from specific capacity from the above relations. This study focuses on a comparison between transmissivity and specific capacity of wells completed as open boreholes in fractured-rock aquifers, where turbulent well loss may be less important.The analytic solutions typically used to predict transmissivity from specific capacity in alluvial aquifers do not agree well with the measured transmissivities in fractured-rock aquifers. Measured transmissivities are less than those estimated from the theoretical solutions based on specific capacity. Some of the variation may be due to shorter testing periods for this data set, the difference between storage coefficients in fractured-rock and alluvial aquifers, or aquifer anisotropy. Correction for these factors alone, however, does not markedly improve the correlation between theoretical and observed specific capacity/trans-missivity relations. Transmissivities derived using the vertical fracture model of Gringarten and Witherspoon (1972), however, correlate very well with the observed specific capacities. Empirical relations between the log of transmissivity and the log of specific capacity for the fractured-rock data set suggest they are linearly related (correlation coefficient of 0.89), but the width of 90% prediction interval is about 1.1 log cycles, indicating that the range of probable transmissivities corresponding to a single specific capacity was more than one order of magnitude.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 34 (1996), S. 0 
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: Use of the specific capacity of a pumping well to predict aquifer transmissivity is desirable due to the cost of pumping tests and the availability of specific capacity measurements. The geostatistical technique of cokriging is a method of incorporating the spatial variability of a correlated variable (e.g., specific capacity) in estimating a related undersampled variable (e.g., transmissivity). This study examines the reliability of cokriging transmissivity estimates using a data set of 215 pairs of transmissivity and specific capacity. Subsets of pairs of transmissivity and specific capacity were selected and cokriged to estimate transmissivity at the remaining well locations. The estimates of transmissivity were then compared to actual measurements of transmissivity. The same subsets of pairs were used to estimate transmissivity with loglinear regression of transmissivity on specific capacity and ordinary kriging of transmissivity alone. Comparison of these three methods indicates the number of wells with both transmissivity and specific capacity data necessary to obtain improvement in transmissivity estimates with cokriging over the simpler regression and kriging methods. The results show that significant improvement in the transmissivity estimate is obtained by cokriging with 50 or more pairs of transmissivity and specific capacity, and that loglinear regression is superior when less than 30 pairs are available. With between 30 and 50 pairs of available data measurements, cokriging does not reliably improve the estimate over loglinear regression.
    Type of Medium: Electronic Resource
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