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Page 4403, results 110051 - 110075

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Invertebrate communities of small streams in northeastern Wyoming
D. A. Peterson
1990, Water-Resources Investigations Report 85-4287
Invertebrate communities of small streams in an energy-mineral- development area in the Powder River structural basin of northeastern Wyoming were studied during 1980-81. The largest average density of benthic invertebrates among 11 sites was 983 invertebrates/sq ft at a site on a perennial stream, the Little Powder River at State...
Ground-water flow in the Gulf Coast aquifer systems, south central United States — A preliminary analysis
A. K. Williamson, H. F. Grubb, J. S. Weiss
1990, Water-Resources Investigations Report 89-4071
A major objective of the Gulf Coast Regional Aquifer-System Analysis is to use digital models of regional groundwater flow systems to develop better understanding and to improve management of the resource. Modeling is used to synthesize information about the aquifer systems and to test hypotheses about the relative importance of...
Relation between urbanization and water quality of streams in the Austin area, Texas
J.E. Veenhuis, R.M. Slade
1990, Water-Resources Investigations Report 90-4107
Selected water-quality properties and constituents of stormflow and base flow were compared to determine the relation between the degree of urbanization and the water quality in a drainage basin. Samples were collected during three flow categories (rising stage and falling stage of stormflow and base flow) at 18 sites on...
Water resources data, Massachusetts and Rhode Island, water year 1988
R. A. Gadoury, R.S. Socolow, R.W. Bell, T.J. Calderini
1990, Water Data Report MA-RI-88-1
Water-resources data for the 1988 water year for Massachusetts and Rhode Island consists of stage, discharge and water quality of streams; contents of lakes and reservoirs; and ground-water levels. This report contains discharge records for 94 gaging stations, month end contents for 20 lakes and reservoirs, water quality for 9...
A Mass-balance nitrate model for predicting the effects of land use on ground-water quality in municipal wellhead-protection areas
M. H. Frimpter, J.J. Donohue, M.V. Rapacz, H.G. Beye
1990, Open-File Report 88-493
A mass-balance accounting model can be used to guide the management of septic systems and fertilizers to control the degradation of groundwater quality in zones of an aquifer that contributes water to public supply wells. The nitrate nitrogen concentration of the mixture in the well can be predicted for steady-state...
Statistical summaries of selected Iowa streamflow data through September 30, 1988
E.E. Fischer, N.B. Melcher, S.P. Kluesner
1990, Open-File Report 90-170
Statistical summaries of streamflow data collected at 144 active and discontinued stream-gaging stations in Iowa through water year 1988 are presented in the report. The summaries for each streamgaging station include: 1) station description, 2) the most recent stage-discharge rating table, 3) statistics of monthly and annual mean discharges, 4)...