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  • Articles  (4)
  • groundwater  (4)
  • Springer  (4)
  • American Meteorological Society
  • Elsevier
  • 1995-1999  (4)
  • 1990-1994
  • 1965-1969
  • 1955-1959
  • 1950-1954
  • 1999  (3)
  • 1995  (1)
  • 1990
  • 1967
  • 1955
  • 1953
  • 1951
  • 1950
  • Architecture, Civil Engineering, Surveying  (4)
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  • Articles  (4)
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Keywords
Publisher
  • Springer  (4)
  • American Meteorological Society
  • Elsevier
Years
  • 1995-1999  (4)
  • 1990-1994
  • 1965-1969
  • 1955-1959
  • 1950-1954
Year
Topic
  • 1
    Electronic Resource
    Electronic Resource
    Determination of hydraulic diffusivity of aquifers by spectral analysis (1999)
    Springer
    Stochastic environmental research and risk assessment 13 (1999), S. 85-99 
    Details
    ISSN: 1436-3259
    Keywords: Key words: Hydraulic diffusivity ; groundwater ; spectral analysis ; stochastic boundaries.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract: This study uses the cyclical frequency to develop the mathematical relationship between hydraulic diffusivity and spectral density functions calculated from groundwater level variation. Such relationship can be applied to (1) unsteady state, one-dimensional confined aquifer with time-dependent water level on both end boundaries, and (2) linearized unconfined aquifer with or without vertical recharge. The spectral density functions of groundwater fluctuations are largely affected by the spectral density functions obtained from time-dependent end boundaries and their cross-spectral density functions. Hydraulic diffusivity of an aquifer can be solved by type-curve matching technique at a specified frequency band under the conditions of (1) confined aquifer having equal time-dependent boundaries on both ends, (2) unconfined aquifer having equal time-dependent boundaries on both ends with surface recharge, and (3) unconfined aquifer subjected to surface recharge but neglecting the water table fluctuations on both end boundaries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004770050033
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Application of remote sensing technology for groundwater potential evaluation (1995)
    Springer
    Water resources management 9 (1995), S. 161-173 
    Details
    ISSN: 1573-1650
    Keywords: Toposheet ; lineaments ; georesistivity ; geomorphology ; drainage ; groundwater
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: Abstract With the help of the information drawn from a survey of India toposheet and by visual interpretation of satellite imagery of bands 2, 3 and 4, different thematic maps such as geomorphology and lineaments, drainage and land use, and land cover were prepared. These thematic maps have been superimposed and finally a groundwater potential zone map delineated on a survey of India toposheet. The whole block has been demarcated into 5 zones. Zones 1 and 2 are considered ideal groundwater potential areas, zone 3 is moderately ideal, and zones 4 and 5 are unfavourable for groundwater exploration. The validity of demarcation of the study area into different zones, as decided by remote sensing technology, has been justified by analysing the georesistivity sounding data of a number of places in this area. The net potential of the study area is estimated by GEC norm. It is observed that only 11.8% of annual utilisable groundwater is now used and there is vast scope of further exploitation of this resource.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00872127
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  • 3
    Electronic Resource
    Electronic Resource
    Field Investigations for Sustainable Groundwater Utilization in the Konan Basin (1999)
    Springer
    Water resources management 13 (1999), S. 443-470 
    Details
    ISSN: 1573-1650
    Keywords: freshwater crisis ; groundwater ; hydrogeology ; Japan ; konan basin ; pumping-tests ; safe pumpage ; sustainable water supply
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: Abstract The Konan groundwater basin of Kochi Prefecture, Japan, is experiencing freshwater shortages for the past few years, particularly during the winter season. The present study aimed at analyzing the problem and exploring increased groundwater withdrawals to meet burgeoning freshwater demands in various sectors. The trend analysis of waterconsumption indicates that the groundwater demandwould increase by 43 and 52% by the years 2010 and2025, respectively, compared to 32 100 m3 d-1 at present.The streamflow of the Monobe River reduces to a minimumin winter and it shows a decreasing trend in recentyears. The geologic investigation results indicatethat unconfined (phreatic) aquifers comprisingalluvial sand and gravel and/or diluvial silty sandand gravel are dominant, and that the northwestern andwestern portions of the basin have greater potentialfor groundwater. Groundwater flows essentially fromnorth to south into the ocean. Groundwater levelfluctuations over the basin vary appreciably in spaceand time, indicating a wide variation of naturalrecharge. Field observations confirm the hypothesisthat stream-aquifer interaction also significantlycontributes to groundwater recharge, besides therainfall infiltration. Further, the pumping testsresults demonstrate that though the aquifers arelow-yielding, enhanced groundwater withdrawals couldbe possible. The aquifer hydraulic conductivity ischaracterized as high and ranges from 65 to 804 m d-1(mean = 229 m d-1), thereby suggesting great aquiferheterogeneity. Finally, it is concluded that thelong-term sustainability of the scarce groundwaterresource of the Konan basin is doubtful, and that acomprehensive analysis of the groundwater system isessential prior to formulating plans for the futuregroundwater development and management.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008184010262
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  • 4
    Electronic Resource
    Electronic Resource
    An Aquifer Management Case Study – The Chalk of the English South Downs (1999)
    Springer
    Water resources management 13 (1999), S. 205-218 
    Details
    ISSN: 1573-1650
    Keywords: groundwater ; management ; monitoring ; pollution prevention ; saline intrusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: Abstract The Chalk aquifer of the English South Downs is very heavily utilised. The groundwater resources have enjoyed a formal programme of management which started in the 1950s, although a number of actions had been taken earlier in order to deal with saline intrusion and potential risk to groundwater quality from urbanisation. In the late 1950s the policy of ‘leakage/storage’ boreholes was first adopted, whereby the ‘leakage’ boreholes along the coast were pumped in winter to intercept fresh water discharge to the sea and to maximise the recharge potential inland, and inland ‘storage’ boreholes were used, as much as possible, in the summer months only. A comprehensive monitoring programme supported by aquifer modelling has enabled a gradual increase in overall abstraction to take place without increasing groundwater degradation due to saline intrusion. There have been various pollution prevention strategies over the years, and these have been effective in protecting the groundwater despite the high population density and widespread agricultural activity within the South Downs. The management of the aquifer has clearly been successful; there are many lessons from this experience that can be applied to other regions and other aquifers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008101727356
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