National Water-Quality Assessment (NAWQA) Program
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Showing results 376 to 401 of 2000.
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Sprague, L.A., Zuellig, R.E., and Dupree, J.A., 2006, Effects of urbanization on stream ecosystems in the South Platte River Basin, Colorado and Wyoming: U.S. Geological Survey Scientific Investigations Report 2006-5101-A, 139 p. Available Online
Sprague, L.A., Mueller, D.K., Schwarz, G.E., and Lorenz, D.L., 2009, Nutrient trends in streams and rivers of the United States, 1993-2003: U.S. Geological Survey Scientific Investigations Report 2008-5202, 196 p. Available Online
Sprague, L.A., Harned, D.A., Hall, D.W., Nowell, L.H., Bauch, N.J., and Richards, K.D., 2007, Response of stream chemistry during base flow to gradients of urbanization in selected locations across the conterminous United States: U.S. Geological Survey Scientific Investigations Report 2007-5083, 132 p. Available Online
Sprague, L.A., and Nowell, L.H., 2008, Comparison of pesticide concentrations in streams at low flow in six metropolitan areas of the United States: Environmental Toxicology and Chemistry, vol. 27, no. 2, p. 288-298. doi: 10.1897/07-276 Available Online
Sprague, L.A., and Lorenz, D.L., 2009, Regional nutrient trends in streams and rivers of the United States, 1993-2003: Environmental Science and Technology, vol. 43, no. 10, p. 3430-3435. doi: 10.1021/es803664x Available Online
Spahr. Norman E., Driver, Nancy E., and Stephens, Verlin C., 1996, The Upper Colorado River National Water-Quality Assessment Program surface-water-monitoring network: U.S. Geological Survey Fact Sheet 191-96, 4 p. Available Online
Spahr, Norman E., Boulger, Robert W., and Szmajter, Richard J., 2000, Water quality at basic fixed sites in the Upper Colorado River Basin National Water-Quality Assessment Study Unit, October 1995-September 1998: U.S. Geological Survey Water-Resources Investigations Report 99-4223, 63 p. Available Online
Spahr, Norman E., Apodaca, Lori E., Deacon, Jeffrey R., Bails, Jeffrey B., Bauch, Nancy J., Smith, Michelle, and Driver, Nancy E., 2001, Water quality in the Upper Colorado River Basin, Colorado, 1996-98: U.S. Geological Survey Circular 1214, 33 p. Available Online
Spahr, Norman E., and Deacon, Jeffrey R., 1998, Water-quality characteristics of the Slate and East Rivers, Colorado, during the winter recreational season, December 1996: U.S. Geological Survey Open-File Report 98-279, 9 p. Available Online
Spahr, Norman E., and Boulger, Robert W., 1997, Interim results of quality- control sampling of surface water for the Upper Colorado River National Water-Quality study unit, water years 1995-96: U.S. Geological Survey Water-Resources Investigations Report 97-4227, 34 p. Available Online
Spahr, N.E., Mueller, D.K., and Wolock, D.W., Hitt, K.J., and Gronberg, J.M., 2010, Development and application of regression models for estimating nutrient concentrations in streams of the conterminous United States, 1992-2001: U.S. Geological Survey Scientific Investigations Report 2009-5199, 22 p. Available Online
Spahr, N.E., and Wynn, K.H., 1997, Nitrogen and phosphorus in surface waters of the Upper Colorado River Basin: Journal of the American Water Resources Association, vol. 33, no. 3, p. 547-560. doi: 10.1111/j.1752-1688.1997.tb03531.x Available Online
Sorenson, Stephen K., ed., 1994, Proceedings abstracts American Water Resources Association's symposium on the National Water-Quality Assessment (NAWQA) Program--November 7-9,1994 Chicago, Illinois: U.S. Geological Survey Open-File Report 94-397, 21 p. Available Online
Soltero, S., Garcia, A.M., Cuffney, T., and McMahon, G., 2010, Effects of urbanization on stream ecosystems (Spanish EUSE Radio WALO 1): U.S. Geological Survey Multimedia Gallery Home Audio 368, 13 minutes. Available Online
Soltero, S., Diaz, P., Douglas, R. and Ortiz, M., 2010, Effects of urbanization on stream ecosystems (Spanish EUSE Radio WALO 2): U.S. Geological Survey Multimedia Gallery Home Audio 384, 33 minutes. Available Online
Smoot, J.L., Liebermann, T.D., Evaldi, R.D., and White, K.D., 1995, Water-quality assessment of the Kentucky River Basin, Kentucky - analysis of available surface-water-quality data through 1986: U.S. Geological Survey Water Supply Paper 2351-B, 194 p. Available Online
Smoot, J.L., Liebermann, T.D., Evaldi, R.D., and White, K.D., 1991, Surface- water-quality assessment of the Kentucky River Basin in Kentucky: Analysis of available information through 1986: U.S. Geological Survey Open-File Report 90-360, 209 p. Available Online
Smith, Stephen B., Donahue, Anne P., Lipkin, Robin J., Blazer, Vicki S., Schmitt, Christopher J., and Goede, Ronald W., 2002, Illustrated field guide for assessing external and internal anomalies in fish: U.S. Geological Survey Information and Technology Report USGS/BRD/ITR-2002-0007, 46 p.
Smith, Stephen B., 2000, Altered endocrine biomarkers in selected fish species in the Hudson River, New York: U.S. Geological Survey Fact Sheet FS-113-00, 2 p.
Smith, Stephen B., 1998, Investigations of endocrine disruption in aquatic systems associated with the National Water-Quality Assessment (NAWQA) Program: U.S. Geological Survey Fact Sheet FS-081-98, 4 p. Available Online
Smith, Richard A., Schwarz, Gregory E., and Alexander, Richard B., 1997, Regional interpretation of water-quality monitoring data: Water Resources Research, December 1997, vol. 33, no. 12, p. 2781-2798. Available Online
Smith, Richard A., Alexander, Richard B., Tasker, Gary D., Price, Curtis V., Robinson, Keith W., and White, Dale A., 1993, Statistical modeling of water-quality in regional watersheds: Watershed '93, p. 751-754.
Smith, Kelly E., and Ruhl, Peter M., 1996, Water-quality assessment of the Albemarle-Pamlico Drainage Basin, North Carolina and Virginia--Organochlorine compounds in Asiatic clam (Corbicula fluminea) soft tissues and whole redbreast sunfish (Lepomis auritus), 1992-93: U.S. Geological Survey Open-File Report 96-201, 6 p. Available Online
Slattery, R.N., and Fahlquist, Lynne, 1997, Water-quality summary of the San Marcos springs Riverine system, San Marcos, Texas, July-August 1994: U.S. Geological Survey Fact Sheet FS-059-97, 4 p. Available Online
Skrobialowski, Stanley C., Mize, Scott V., and Demcheck, Dennis K., 2004, Environmental setting, water quality, and ecological indicators of surface-water quality in the Mermentau River Basin, southwestern Louisiana, 1998-2001: U.S. Geological Survey Water-Resources Investigations Report 03-4185, 73 p. Available Online
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