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Page 4712, results 117776 - 117800

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Pesticide data for selected Wyoming streams, 1976-78
David L. Butler
1987, Water-Resources Investigations Report 83-4127
In 1976, the U.S. Geological Survey, in cooperation with the Wyoming Department of Agriculture, started a monitoring program to determine pesticide concentrations in Wyoming streams. This program was incorporated into the water-quality data-collection system already in operation. Samples were collected at 20 sites for analysis of various insecticides, herbicides, polychlorinated...
AQMAN; linear and quadratic programming matrix generator using two-dimensional ground-water flow simulation for aquifer management modeling
L.J. Lefkoff, S.M. Gorelick
1987, Water-Resources Investigations Report 87-4061
A FORTRAN-77 computer program code that helps solve a variety of aquifer management problems involving the control of groundwater hydraulics. It is intended for use with any standard mathematical programming package that uses Mathematical Programming System input format. The computer program creates the input files to be used by the...
An assessment of the variability in performance of wet atmospheric deposition samplers
R.C. Graham, J.K. Robertson, John Obal
1987, Water-Resources Investigations Report 87-4125
The variability in performance of two brands of wet/dry atmospheric deposition samplers were compared for 1 year at a sincle site. A total of nine samplers were used. Samples were collected weekly and analyzed for pH, specific conductance, common chemical constituents, and sample volume. Additionally, data on the duration of...
Discharge ratings for control gates at Mississippi River lock and dam 20, Canton, Missouri
A.J. Heinitz
1987, Water-Resources Investigations Report 87-4149
The water levels of the navigation pools on the Mississippi River are maintained by the operation of tainter and roller gates at the locks and dams. Discharge ratings for the gates on Lock and Dam 20, at Canton, Missouri, were developed from current meter discharge measurements made in the forebays...
Effects of proposed highway embankment modifications on water-surface elevations in the lower Pearl River flood plain near Slidell, Louisiana
J. J. Gilbert, R. E. Schuck-Kolben
1987, Water-Resources Investigations Report 86-4129
Major flooding in the lower Pearl River basin in recent years has caused extensive damage to homes and highways in the area. In 1980 and 1983, Interstate Highway 10 and U.S. Highway 190 were overtopped. In 1983, the Interstate Highway 10 crossing was seriously damaged by the flood. The U.S....
Discharge ratings for control gates at Mississippi River lock and dam 21, Quincy, Illinois
A.J. Heinitz
1987, Water-Resources Investigations Report 87-4155
The water levels of the navigation pools on the Mississippi River are maintained by the operation of tainter and roller gates at the locks and dams. Discharge ratings for the gates on Lock and Dam 21, at Quincy, Illinois, were developed from current meter discharge measurements made in the forebays...