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Page 3960, results 98976 - 99000

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Sediment-quality assessment of Franklin D. Roosevelt Lake and the upstream reach of the Columbia River, Washington, 1992
Gilbert Carl Bortleson, S.E. Cox, M.D. Munn, R.J. Schumaker, E. K. Block, L.R. Bucy, R.J. Cornelius
1994, Open-File Report 94-315
The occurrence and distribution of trace elements and of wood-pulp-related compounds in the sediments of Lake Roosevelt and the upstream reach sampler of the Columbia River were studied in 1992. In addition, an analysis of benthic invertebrate community structure and tests of sediment toxicity were conducted. Concentrations of trace elements...
Water-quality, lithologic, and water-level data for wells in Tulare Basin, Kings, Kern, and Tulare Counties, California, August 1990 to February 1993
Sherrill Beard, Roger Fujii, W. Gary Shanks
1994, Open-File Report 94-334
Much of the Tulare Basin is characterized by saline shallow ground water containing elevated concen- trations of arsenic, selenium, and other trace elements. A comprehensive investigation of ground-water geochemist, and, to a limited extent, hydrology was initiated in response to concerns related to (1) adverse effects on migratory waterfowl of...
Summary of water-resources activities of the U.S. Geological Survey in Colorado - Fiscal years 1992-93
Water Resources Division, U.S. Geological Survey
1994, Open-File Report 94-383
Water-resources activities of the U.S. Geological Survey in Colorado consist of collecting water-resources data and doing interpretive hydrologic investigations. The water-resources data and the results of the investigations are published or released by either the U.S. Geological Survey or by cooperating agencies. Water-resources investigations in Colorado for the 1992-93 fiscal...
Yields of selected constituents in base flow and stormflow in urban watersheds of Jefferson County, Kentucky, 1988-92
R. D. Evaldi, B.L. Moore
1994, Water-Resources Investigations Report 94-4065
Mean annual base-flow and stormflow yields of selected water-quality constituents from urban watersheds of Jefferson County, Kentucky, were estimated for 1988-92 to help describe the pro portions of constituent transport from point and nonpoint sources. Yield estimates were based on streamflow and water-quality data collected from a network of 25...
Comparison of vertical discretization techniques in finite-difference models of ground-water flow; example from a hypothetical New England setting
Philip T. Harte
1994, Open-File Report 94-343
Proper discretization of a ground-water-flow field is necessary for the accurate simulation of ground-water flow by models. Although discretiza- tion guidelines are available to ensure numerical stability, current guidelines arc flexible enough (particularly in vertical discretization) to allow for some ambiguity of model results. Testing of two common types of...
Methods of analysis and quality-assurance practices of the U.S. Geological Survey organic laboratory, Sacramento, California: Determination of pesticides in water by solid-phase extraction and capillary-column gas chromatography/mass spectrometry
Kathryn L. Crepeau, Joseph L. Domagalski, Kathryn Kuivila
1994, Open-File Report 94-362
Analytical method and quality-assurance practices were developed for a study of the fate and transport of pesticides in the Sacramento-San Joaquin Delta and the Sacramento and San Joaquin River. Water samples were filtered to remove suspended parti- culate matter and pumped through C-8 solid-phase extraction cartridges to extract the pesticides....
Physical characteristics and quality of water from selected springs and wells in the Lincoln Point-Bird Island area, Utah Lake, Utah
R. L. Baskin, L.E. Spangler, W. F. Holmes
1994, Water-Resources Investigations Report 93-4219
From February 1991 to October 1992, the U.S. Geological Survey, in cooperation with the Central Utah Water Conservancy District, investigated the hydrology of the Lincoln Point - Bird Island area in the southeast part of Utah Lake, Utah. The investigation included measurements of the discharge of selected springs and measurements...
National Water-Quality Assessment Program: the Northern New England Basins study unit
Sarah M. Flanagan, Keith W. Robinson
1994, Fact Sheet 027-94
In 1991, the U.S. Geological Survey (USGS), U.S. Department of the Interior, began a full-scale National Water-Quality Assessment (NAWQA) program. The objectives of the NAWQA program are to describe the present and future water quality of large, representative parts of the United States's surface- and ground-water resources and to identify...
Water resources of the Menominee Indian Reservation of Wisconsin
J. T. Krohelski, P.A. Kammerer, Terrence D. Conlon
1994, Water-Resources Investigations Report 93-4053
Water resources of the Menominee Indian Reservation, Wisconsin, were investigated during the period October 1981 through September 1987. The report presents baseline data and some interpretation of ground- and surface-water hydrology and quality of the Reservation. The area stratigraphy consists of basal Precambrian crystalline bedrock and overlying till and sand and...