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Page 4196, results 104876 - 104900

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Geohydrology and digital simulation of the ground-water flow system in the Umatilla Plateau and Horse Heaven Hills area, Oregon and Washington
A. Davies-Smith, E.L. Bolke, C. A. Collins
1988, Water-Resources Investigations Report 87-4268
The Columbia Plateau is underlain by massive basalt flows, with a composite thickness of about 10,000 ft. Structural features within the study area include a series of anticline-syncline pairs. The main avenues of groundwater movement in the basalt are the interflow zone between basalt flows. Individual interflow zones may be...
Statistical summary of the chemical quality of surface water in the Powder River coal basin, the Hanna coal field, and the Green River coal region, Wyoming
D. A. Peterson
1988, Water-Resources Investigations Report 84-4092
A summary of the chemical quality of surface water in the three principal coal-producing areas of Wyoming was intensified by the U.S. Geologic Survey during 1975-81, in response to interest spurred by a dramatic increase in surface mining of the areas. This statistical summary consists of descriptive statistics and regression...
Statistical summary of selected water-quality data (water years 1975 through 1985) for Arkansas rivers and streams
J. C. Petersen
1988, Water-Resources Investigations Report 88-4112
Descriptive statistics were calculated for selected water quality data for 116 water quality stations on Arkansas rivers and streams. Water quality properties summarized included pH, specific conductance, dissolved oxygen, total alkalinity, total hardness, common dissolved constituents, phosphorus, nitrogen, biochemical oxygen demand, bacteria, turbidity, suspended sediment, and several trace metals. Regression...
Simulated water-level declines caused by ground-water withdrawals near Holloman Air Force Base, Otero County, New Mexico
A.W. Burns, D.L. Hart Jr.
1988, Water-Resources Investigations Report 86-4324
The U.S. Geological Survey, in cooperation with the U.S. Air Force, Holloman Air Force Base, studied the potential change in water levels that could occur as a result of increased groundwater withdrawals from the middle-Tertiary to Holocene age basin-fill and alluvial deposits in the vicinity of the Air Force base...
Relation of trihalomethane-formation potential to water-quality and physical characteristics of small water-supply lakes, eastern Kansas
L. M. Pope, J. A. Arruda, C. H. Fromm
1988, Water-Resources Investigations Report 88-4161
The formation of carcinogenic trihalomethanes during the treatment of public surface water supplies has become a potentially serious problem. The U. S. Geological Survey, in cooperation with the Kansas Department of Health and Environment , investigated the potential for trihalomethane formation in water from 15 small, public water supply lakes...
Reassessment of the Georgetown limestone as a hydrogeologic unit of the Edwards Aquifer, Georgetown area, Texas
L. F. Land, M.E. Dorsey
1988, Water-Resources Investigations Report 88-4190
The Edwards aquifer consists of geologic units known as the Comanche Peak (oldest) and Edwards Limestones, Kiamichi Formation, and Georgetown Limestone. The Edwards Limestone is the main water-bearing zone. The shallow geologic units dip to the east-southeast at a slope of 50 to 100 feet per mile in the Georgetown...