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Page 4195, results 104851 - 104875

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Occurrence and distribution of nitrate and herbicides in the Iowa River alluvial aquifer, Iowa: May 1984 to November 1985
M.G. Detroy, R.L. Kuzniar
1988, Water-Resources Investigations Report 88-4117
From May 1984 to November 1985, the U.S. Geological Survey, in cooperation with the University of Iowa Hygienic Laboratory and the Iowa Department of Natural Resources, Geological Survey Bureau, investigated nitrate and herbicides in the Iowa River alluvial aquifer. The occurrence and distribution of nitrate and selected herbicides were determined...
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...
Reconnaissance investigation of water quality, bottom sediment, and biota associated with irrigation drainage in the lower-Colorado River valley, Arizona, California, and Nevada, 1986-87
D. B. Radtke, W. G. Kepner, R. J. Effertz
1988, Water-Resources Investigations Report 88-4002
The Lower Colorado River Valley Irrigation Drainage Project area included the Colorado River and its environs from Davis Dam to just above Imperial Dam. Water, bottom sediment, and biota were sampled at selected locations within the study area and analyzed for selected inorganic and synthetic organic constituents that are likely...
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...
Major ground-water flow systems in the Great Basin region of Nevada, Utah, and adjacent states
James R. Harrill, Joseph Spencer Gates, James M. Thomas
1988, Hydrologic Atlas 694-C
This atlas is one of several reports that are products of an analysis of regional aquifer systems in the Great Basin of Nevada, Utah, and adjacent States.  The Geological Survey program of regional aquifer-system analyses is a nationwide study of ground-water systems on a regional scale.  The program is intended...
Water resources data, Pennsylvania, water year 1986. Volume 1: Delaware River Basin
J.R. Kolva, T.E. White, L.D. Cecil, R.L. Druther
1988, Water Data Report PA-86-1
Water resources data for the 1986 water year for Pennsylvania consist of records of discharge and water quality of streams; contents and elevations of lakes and reservoirs; and water levels and water quality of ground-water wells. This report, Volume 1, includes records from the Delaware River basins. Specifically, it contains:...
Hydrogeology and preliminary assessment of regional flow in the upper Cretaceous and adjacent aquifers in the northern Mississippi embayment
J. V. Brahana, T. O. Mesko
1988, Water-Resources Investigations Report 87-4000
On a regional scale, the groundwater system of the northern Mississippi embayment is composed of a series of nonindurated clastic sediments that overlie a thick sequence of Paleozoic carbonate, sandstones, and shales. The units that comprise the geohydrologic framework of this study are the alluvium-lower Wilcox Aquifer the Midway confining...