ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1973.tb02975.x

出版商:Blackwell Publishing Ltd    

年代:1973

数据来源: WILEY

摘要:

ABSTRACTThe sheetlike solution cavities that supply water to most wells in central Tennessee are 100 to 2,500 feet wide and less than 0.2 inch high. These dimensions have a scale similar to those in Hele‐Shaw models. Both logical and mathematical evidence indicate laminar ground‐water flow, except close to pumping wells. The Theis nonequilibrium formula may be used to analyze aquifer‐test data and to calculate significant values for transmissivity and storage. The Navier‐Stokes equation and the Darcy equation for steady‐state conditions may be used to estimate cavity d

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1973.tb02976.x

出版商:Blackwell Publishing Ltd    

年代:1973

数据来源: WILEY

摘要:

ABSTRACTApplication of deicing salts to streets and highways is a common phenomena to those living in the northern and border States. This paper points out one problem that can occur from runoff from large quantities of deicing salts. Tests of water samples from shallow wells in 1967, 1968, and 1973 document the loss of a water supply in an Indianapolis, Indiana, suburban housing development and the subsequent natural purging of high chlorinity waters.

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1973.tb02977.x

出版商:Blackwell Publishing Ltd    

年代:1973

数据来源: WILEY

摘要:

ABSTRACTThe Arcachon Bay Plio‐Quaternary aquifer, located in a flat poorly‐drained region which receives one m annual precipitation, has a shallow water table which impedes agricultural development. It is composed of a 50‐100 m thick body of well‐sorted clean sand and gravel which has excellent hydrodynamic properties and much fresh ground water in storage. This affluent aquifer is underlain by, and interconnected with, a relatively poor calcareous aquifer of Miocene age.Leakage to the Miocene aquifer, inferred from geologic and hydrogeologic observations, was calculated by water budgeting and Darcy's law to be on the order of 1.5 m3/s. This rate, about 15 percent of the annual precipitation, is nearly half the recharge rate to the Plio‐Quaternary aquifer.Schoeller's chloride method was used to estimate recharge to the Plio‐Quaternary aquifer, and indicated that this recharge amounts to more than 35 percent of the annual precipitation. The calculation of the water budget supported this finding. The evapotranspiration rate, based on Thornthwaite's method, is more than 55 percent of the annual precipitation. High recharge and evapotranspiration rates, a direct consequence of the relief, permeability of soils, and occurrence of hot summers, are coupled with a low surface runoff.Exploitation of the Plio‐Quaternary aquifer can be planned confidently for irrigation and water‐supply purposes. Drainage improvement, needed for extensive farming of the lands, will also result from such exploitation. These development measures are suggested to be tailored and staged in the framework of the master plan aimed to develop and conserve the Arcachon Bay area and the region it is part of.Descriptors: subhumid environment, shallow water table, multiple‐aquifer systems, leaky aquifers, Darcy's law, aquifer recharge, Schoeller's chloride method, water budget, ground‐water quality, environmental hydrogeology, development and conservation.Identifiers: shallow leaky aquifers in s

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1973.tb02978.x

出版商:Blackwell Publishing Ltd    

年代:1973

数据来源: WILEY

摘要:

ABSTRACTA solution is obtained for drawdown around pumping wells in aquifers near streams in the presence of delayed yield from storage using the image theory. Two methods (the second one with two variants) are presented for determining the aquifer constants. The first method is based on the type curves for the initial moments of pumping and for later ones. The Carson‐Laplace transforms of drawdown field data are required for applying the other method. A field example Ts used for illustratio

ISSN:0017-467X    

DOI:10.1111/j.1745-6584.1973.tb02979.x

出版商:Blackwell Publishing Ltd    

年代:1973

数据来源: WILEY