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Page 503, results 12551 - 12575

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Quality of ground water in Idaho
Johnson J. Yee, William R. Souza
1987, Water Supply Paper 2272
The major aquifers in Idaho are categorized under two rock types, sedimentary and volcanic, and are grouped into six hydrologic basins. Areas with adequate, minimally adequate, or deficient data available for groundwater-quality evaluations are described. Wide variations in chemical concentrations in the water occur within individual aquifers, as well as...
Water Resources Data for Georgia, Water Year 1986
W.R. Stokes, T.W. Hale, G. R. Buell
1987, Water Data Report GA-86-1
This volume of the annual hydrologic data report of Georgia is one of a series of annual reports that document hydrologic data gathered from the U.S. Geological Survey's surface- and ground-water data-collection networks in each State, Puerto Rico, and the Trust Territories. These records of streamflow, ground-water levels, and quality...
Average Annual Runoff in the United States, 1951-80
W.A. Gebert, David J. Graczyk, William R. Krug
1987, Hydrologic Atlas 710
Runoff is the water in a river or stream that results from precipitation falling on the drainage basin. It is the net discharge into the stream from surface-water and ground-water sources with losses occurring from evapotranspiration and other consumptive uses. Runoff can be expressed by a variety of numerical values,...
Approximate potentiometric surfaces for the aquifers of the Texas coastal uplands system, 1980
Sergio Garza, B.D. Jones, E.T. Baker
1987, Hydrologic Atlas 704
The National Water Commission recommended that the U.S. Geological Survey conduct intensive studies of the important regional aquifer systems in the United States, particularly those with declining water levels and deteriorating water quality.  The result has been a series of Regional Aquifer-System Analysis (RASA) studies, one of which is the...
Magnitude and frequency of floods in rural and urban basins of North Carolina
H.C. Gunter, R.R. Mason, T. C. Stamey
1987, Water-Resources Investigations Report 87-4096
The applicability of the nationwide urban flood relations in the Piedmont and Coastal Plain provinces is evaluated. Data for 254 gaging stations on rural streams with 10 or more years of record were used in multiple linear regression analyses with basin and climatic variables, to derive regional relations for estimating...
Hydrologic and geochemical monitoring in Long Valley Caldera, Mono County, California, 1985
C. D. Farrar, M.L. Sorey, S.A. Rojstaczer, C. J. Janik, T. L. Winnett, M. D. Clark
1987, Water-Resources Investigations Report 87-4090
Hydrologic and geochemical monitoring, to detect changes caused by magmatic and tectonic processes in the Long Valley caldera has continued through 1985. The monitoring included the collection of the following types of data: chemical and isotopic composition of water and gases from springs, wells, and steam vents; temperatures in wells,...
Ground-water and soil contamination near two pesticide-burial sites in Minnesota
J. R. Stark, J.D. Strudell, P.A. Bloomgren, P. Eger
1987, Water-Resources Investigations Report 87-4115
Preliminary investigations of the geology, groundwater hydrology , and soil and groundwater chemistry at sites in Pine and St. Louis Counties, Minnesota, have shown that contamination associated with pesticides buried at the sites is not widespread or highly concentrated. None of the pesticides sampled for in soil and in groundwater...
Ground-water resources of Flagler County, Florida
A. S. Navoy, L. A. Bradner
1987, Water-Resources Investigations Report 87-4021
Groundwater is the only significant source of potable water in Flagler County. Usable water occurs in the Upper Floridan aquifer, the intermediate population is expected to place stresses on the water resources of the county. Although rainfall averages almost 50 in/yr, most of the water leaves as evapotranspiration and streamflow....
Hydrogeology and water quality of areas with persistent ground-water contamination near Blackfoot, Bingham County, Idaho
D. J. Parliman
1987, Water-Resources Investigations Report 87-4150
The Groveland-Collins area near Blackfoot, Idaho, has a history of either periodic or persistent localized groundwater contamination. Water users in the area report offensive smell, metallic taste, rust deposits, and bacteria in water supplies. During 1984 and 1985, data were collected to define regional and local geologic, hydrologic, and groundwater...
Water resources and potential effects of surface coal mining in the area of the Woodson Preference Right Lease Application, Montana
M. R. Cannon
1987, Water-Resources Investigations Report 87-4027
Federal coal lands of the Woodson Preference Right Lease Application are located in Dawson and Richland Counties, northeastern Montana. A probable mine area, comprised of the lease area and adjacent coal lands, contains about 220 million tons of recoverable lignite coal in the 12-37 ft thick Pust coal bed. A...
Hydrologic data for urban studies in the Houston metropolitan area, Texas, 1984
Fred Liscum, J.P. Bruchmiller, D. W. Brown, E.M. Paul
1987, Open-File Report 86-608
Hydrologic investigations of urban watersheds in Texas were begun by the U.S. Geological Survey in 1954. Studies are now in progress in the Austin and Houston areas, and have been completed in the Dallas-Fort Worth and San Antonio areas. The U.S. Geological Survey, in cooperation with the city of Houston, began...
Hydrologic analysis of two headwater lake basins of differing lake pH in the west-central Adirondack Mountains of New York
Peter S. Murdoch, N.E. Peters, R. M. Newton
1987, Water-Resources Investigations Report 84-4313
Hydrologic analysis of two headwater lake basins in the Adirondack Mountains, New York, during 1980-81 indicates that the degree of neutralization of acid precipitation is controlled by the groundwater contribution to the lake. According to flow-duration analyses, daily mean outflow/unit area from the neutral lake (Panther Lake, pH 5-7) was...
Ground-water hydrology of the Toppenish Creek basin, Yakima Indian Reservation, Washington
J.A. Skrivan
1987, Water-Resources Investigations Report 82-4010
A groundwater flow model was constructed for the Toppenish Creek basin aquifer system in eastern Washington. Flow was simulated in three aquifer units: (1) the confined old valley fill and shallow basalt (unit 2); (2) the underlying primary basalt (unit 3); and (3) the deep basalt (unit 4). Water levels...
Effect of grid size on digital simulation of ground-water flow in the southern High Plains of Texas and New Mexico
R. R. Luckey, D.M. Stephens
1987, Water-Resources Investigations Report 87-4085
Three models of the aquifer in the southern High Plains were compared to determine the effect of grid size on simulated water levels. The first model, calibrated prior to this study, had 10-mi grid spacing. The mean difference between the simulated and measured pre-development water levels in this model was...
Relations of specific conductance to streamflow and selected water-quality characteristics of the Arkansas River basin, Colorado
Doug Cain
1987, Water-Resources Investigations Report 87-4041
Areal, seasonal, and long-term variations in the specific conductance of surface and groundwater in the Arkansas River basin of Colorado were evaluated and relations of specific conductance to stream-flow and to concentrations of dissolved solids and major ions were determined as part of an effort to develop a comprehensive hydrologic...
Hydrology and chemistry of selected prairie wetlands in the Cottonwood Lake area, Stutsman County, North Dakota, 1979-82
J. W. LaBaugh, T. C. Winter, V. A. Adomaitis, G.A. Swanson
1987, Professional Paper 1431
The relation of hydrologic setting and temporal variability in hydrology to nutrient content and geochemical characteristics of a group of prairie wetlands and adjacent ground water was studied during the period 1979-82. Although data were collected from many wetlands and wells at the study site, emphasis in this report primarily...