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Ground-water levels in selected well fields and in west-central Florida, September 1980
D. K. Yobbi, L. R. Mills, W. M. Woodham
1980, Open-File Report 81-77
The water table in the surficial aquifer and the potentiometric surface of the Floridan aquifer in a 1,200-square-mile area in west-central Florida are mapped semiannually by the U.S. Geological Survey. Maps are based on water levels measured in wells each May to coincide with seasonal low levels and each September...
Ground-water appraisal of sand plains in Benton, Sherburne, Stearns, and Wright counties, central Minnesota
Gerald F. Lindholm
1980, Open-File Report 80-1285
Surficial-sand aquifers in 960 square miles of central Minnesota have been studied to determine the occurrence, availability, and suitability of the surficial aquifer as a source of water. The aquifer is being increasingly developed for irrigation. During the drought of 1976, nearly 24,000 acre-feet of ground water was withdrawn for irrigation,...
Results and evaluation of a pilot primary monitoring network, San Francisco Bay, California, 1978
W.L. Bradford, R.T. Iwatsubo
1980, Water-Resources Investigations Report 80-73
A primary monitoring network of 12 stations, with measurements at 1-meter depth intervals every 2 weeks during periods of high inflow from the Sacramento-San Joaquin River delta, and every 4-6 weeks during seasonal low delta inflows, appears adequate to observe major changes in ambient water quality in San Francisco Bay....
Water-resources data collected in the Devils Hole area, Nye County, Nevada, 1977-1978
R.L. Carson
1980, Open-File Report 80-772
This report presents water data collected at Devils Hole and vicinity for July 1977 through June 1978 to observe the effects of irrigation pumping on the pool level in Devils Hole. The pool contains the endangered species of pupfish, Cyprinodon diabolis. The report presents data on fluctuations in water level...
A statistical analysis of the quality of surface water in Nebraska
R. A. Engberg
1980, Water-Resources Investigations Report 80-43
This report provides descriptive statistics for 29 chemical or biological constituents for 109 stream sites in Nebraska sampled by the U.S. Geological Survey beginning in 1946. Also provided for each site are regression equations relating specific conductance to each of 12 chemical constituents and a regression equation relating specific conductance...