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Maps showing trace-element geochemistry of the Sangre de Cristo Wilderness Study Area, south-central Colorado
David R. Zimbelman
1989, Miscellaneous Field Studies Map 1635-C
A trace-element geochemical study of the Sangre de Cristo Wilderness Study Area included the collection of 710 heavy-mineral-concentrate samples, 767 minus-80 mesh stream-sediment samples, and 145 rock samples.  All samples were analyzed for 31 elements by semiquantitative emission-spectrographic methods, and some stream-sediment and rock samples were also analyzed for selected...
Quality of water from public-supply wells in principal aquifers of Illinois, 1984-87
David C. Voelker
1989, Water-Resources Investigations Report 88-4111
The quality of water from public-supply wells that tap the principal aquifers in Illinois are summarized. Water quality data collected during the study included inorganic and volatile organic constituents in 2,756 samples and soluble organic constituents in 330 samples from 2,080 public supply wells. Water quality differs among the aquifers...
Statistical summary of streamflow data for Indiana
Donald V. Arvin
1989, Open-File Report 89-62
Statistical analyses of daily mean discharge values collected at 229 Indiana streamflow-gaging stations are presented. For each station, data collected from the beginning of period of record through the 1985 water year were analyzed. Summaries include flow-duration, high-flow, and low-flow tables, and monthly and annual mean discharge. (USGS)...
Sediment transport and accretion and the hydrologic environment of Grove Creek near Kenansville, North Carolina
T. C. Stamey
1989, Water-Resources Investigations Report 89-4086
The Grove Creek basin includes an area of about 42 square miles in Duplin County, southeastern North Carolina. This report evaluates sediment transport and sediment-accretion rates in the lowermost 9-mile reach of Grove Creek by using hydrologic, dendrologic, and radioisotopic data collected at seven sites along the study reach. Hydrologic data...
Effect of urban runoff on the quality of lakes in Eagan, Minnesota
L. H. Tornes
1989, Water-Resources Investigations Report 86-4331
Sixteen lakes in the city of Eagan, Minnesota, were sampled during 1982-83 to detect water-quality changes that might have occurred because of urbanization since a previous study conducted during 1972-78. Each of the lakes was sampled five times to determine pH, specific conductance, dissolved oxygen, water temperature, transparency, and concentration...
A Computerized Data-Base System for Land-Use and Land-Cover Data Collected at Ground-Water Sampling Sites in the Pilot National Water Quality Assessment Program
Jonathon C. Scott
1989, Water-Resources Investigations Report 89-4172
Data-base software has been developed for the management of land-use and land-cover data collected by the U.S. Geological Survey as part of a pilot program to test and refine concepts for a National Water-Quality Assessment Program. This report describes the purpose, use, and design of the land-use and land-cover data-base...