Results 311 to 320 of about 2,571,636 (343)
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Reviews of Geophysics, 1983
There is growing documentation that a significant portion of the Nation's fresh ground water in the densely populated areas of the country is contaminated. Because of the slow rates of ground‐water movement, ground water once contaminated will remain so for decades, often longer. Cleanup of contaminated ground water is almost always expensive and often
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There is growing documentation that a significant portion of the Nation's fresh ground water in the densely populated areas of the country is contaminated. Because of the slow rates of ground‐water movement, ground water once contaminated will remain so for decades, often longer. Cleanup of contaminated ground water is almost always expensive and often
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Journal AWWA, 1968
This article presents a hydraulic model analogous to very general subsurface geologic conditions, containing 30 observation wells. It was constructed to study and demonstrate the changes in the configuration of the water table produced by pumping wells.
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This article presents a hydraulic model analogous to very general subsurface geologic conditions, containing 30 observation wells. It was constructed to study and demonstrate the changes in the configuration of the water table produced by pumping wells.
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Journal of the Hydraulics Division, 1963 Ground water forms an appreciable part of Texas’ water resources. Programs of the Texas Water Commission are directed toward overcoming a deficiency of ground-water information for statewide water planning. Quantitative methods used for reconnaissance studies being made of the entire State provide generalized evaluations of ground water available for ...
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2007
Waterborne disease outbreaks are often associated with non-porous media aquifers, such as fractured bedrock (metamorphic rock) or karst (lime- stone) aquifers e.g. South Bass Island Ohio USA (Fong et al., 2007). In these aquifers, ground water flow is fast and direct with little opportunity for inacti- vation or attachment to the aquifer matrix.
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Waterborne disease outbreaks are often associated with non-porous media aquifers, such as fractured bedrock (metamorphic rock) or karst (lime- stone) aquifers e.g. South Bass Island Ohio USA (Fong et al., 2007). In these aquifers, ground water flow is fast and direct with little opportunity for inacti- vation or attachment to the aquifer matrix.
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Ground Water Development [PDF]
, 2004 The surface water resources of the Brahmaputra basin are not adequate, under present condition to meet water demands during the rabi season. There is, however, ample ground water potential in the basin but it has not yet been fully exploited. Therefore groundwater needs to be developed without further delay.
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1996
Constructing works below ground level is a major part of the work of a Civil Engineer and the ingress of ground water can cause serious problems. Water-logged conditions can slow work considerably and cause safety problems, such as erosion or collapse of the sides of an excavation, or even flooding, and so ground water must be controlled to carry out ...
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Constructing works below ground level is a major part of the work of a Civil Engineer and the ingress of ground water can cause serious problems. Water-logged conditions can slow work considerably and cause safety problems, such as erosion or collapse of the sides of an excavation, or even flooding, and so ground water must be controlled to carry out ...
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1989
Abstract Ground water is a natural resource which provides the benefits inherent to its use as a final commodity or as an input to a productive process. Considering the problem of cost assessment, and disregarding the possible effects on water quality, three types of external effects can be distinguished which are not considered by individuals: a) a
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Abstract Ground water is a natural resource which provides the benefits inherent to its use as a final commodity or as an input to a productive process. Considering the problem of cost assessment, and disregarding the possible effects on water quality, three types of external effects can be distinguished which are not considered by individuals: a) a
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GROUND‐WATER ENERGY AND THE GROUND‐WATER SOURCE HEAT PUMP
Groundwater, 1977Jay H. Lehr, Tyler E. Gass
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1989
ABSTRACT In nonirrigated areas, downward flow or deep percolation rates (Darcy flux) in the vadose zone typically range from approximately 1mm/yr or less for semiarid or arid areas to approximately 500 mm/yr or more for humid areas. Irrigated areas in dry climates can have deep percolation rates as a few cm/yr to a few dm/yr for relative efficient ...
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ABSTRACT In nonirrigated areas, downward flow or deep percolation rates (Darcy flux) in the vadose zone typically range from approximately 1mm/yr or less for semiarid or arid areas to approximately 500 mm/yr or more for humid areas. Irrigated areas in dry climates can have deep percolation rates as a few cm/yr to a few dm/yr for relative efficient ...
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