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Page 4535, results 113351 - 113375

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Effects of three highway-runoff detention methods on water quality of the surficial aquifer system in central Florida
D. M. Schiffer
1989, Water-Resources Investigations Report 88-4170
Water quality of the surficial aquifer system in central Florida was evaluated at one exfiltration pipe, two ponds (detention and retention), and two swales in central Florida, representing three runoff-detention methods, to detect any effect from infiltrating highway runoff. Concentrations of major ions, metals, and nutrients in groundwater and bottom...
Cost effectiveness of the stream-gaging program in North Dakota
Gerald L. Ryan
1989, Water-Resources Investigations Report 89-4068
This report documents results of a cost-effectiveness study of the stream-gaging program In North Dakota. It is part of a nationwide evaluation of the stream-gaging program of the U.S. Geological Survey.One phase of evaluating cost effectiveness is to identify less costly alternative methods of simulating streamflow records. Statistical or hydro...
Subsurface storage of liquids in the Floridan aquifer system in south Florida
Frederick W. Meyer
1989, Open-File Report 88-477
The Floridan aquifer system in south Florida is composed chiefly of carbonate rocks that range in age from early Miocene to Paleocene. The top of the Floridian aquifer system generally occurs at depths ranging from 500 to 1,000 ft, and the average thickness is about 3,000 ft. It is divided...
Direct-current vertical electrical-resistivity soundings in the Lower Peninsula of Michigan
D.B. Westjohn, P.J. Carter
1989, Open-File Report 89-244
Ninety-three direct-current vertical electrical-resistivity soundings were conducted in the Lower Peninsula of Michigan from June through October 1987. These soundings were made to assist in mapping the depth to brine in areas where borehole resistivity logs and water-quality data are sparse or lacking. The Schlumberger array for placement of current...