National Water-Quality Assessment (NAWQA) Program
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Showing results 76 to 101 of 606.
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Tate, C.M., Cuffney, T.F., McMahon, Gerald, Giddings, E.M.P., Coles, J.R., and Zappia, Humbert, 2005, Use of an urban intensity index to assess urban effects on streams in three contrasting environmental settings: in Brown, L.R., Gray, R.H., Hughes, R.M., and Meador, M.R., eds., Effects of Urbanization on Stream Ecosystems: AFS Symposium 47, American Fisheries Society, p. 291-315. Available Online
Szabo, Zoltan, Fischer, J.M., and Hancock, T.C., 2012, Principal aquifers can contribute radium to sources of drinking water under certain geochemical conditions: U.S. Geological Survey Fact Sheet 2010-3113, 6 p. Available Online
Szabo, Zoltan, dePaul, Vincent T., Fischer, Jeffrey M., Kraemer, Thomas F., and Jacolsen, Eric, 2012, Occurrence and geochemistry of radium in water from principal drinking-water aquifer systems of the United States: Applied Geochemistry, vol. 27, Issue 3, March 2012, p. 729-752. doi: 10.1016/j.apgeochem.2011.11.002 Available Online
Stoner, J.D., Cowdery, T.K., and Puckett, L.J., 1997, Ground-water age dating and other tools used to assess land-use effects on water quality: U.S. Geological Survey Water-Resources Investigations Report 97-4150, 6 p. Available Online
Stone, W.W., Gilliom, R.J., and Crawford, C.G., 2008, Watershed Regressions for Pesticides (WARP) for predicting annual maximum and maximum moving-average concentrations of atrazine in streams: U.S. Geological Survey Open-File Report 2008-1186, 19 p. Available Online
Stone, W.W., and Wilson, J.T., 2006, Preferential flow estimates to an agricultural tile drain with implications for glyphosate transport: Journal of Environmental Quality, vol. 35, no. 5, p. 1825-1835. doi:10.2134/jeq2006.0068 Available Online
Stone, W.W., and Gilliom, R.J., 2009, Update of watershed regressions for pesticides (WARP) for predicting atrazine concentration in streams: U.S. Geological Survey Open-File Report 2009-1122, 22 p. Available Online
Stone, W.W., 2013, Estimated annual agricultural pesticide use for counties of the conterminous United States, 1992-2009: U.S. Geological Survey Data Series 752, 1 p. Available Online
Stolp, B.J. , 2007, Hydrogeologic Setting and Ground-Water Flow Simulations of the Salt Lake Valley Regional Study Area, Utah, Section 2 in Paschke, S.S., ed., Hydrogeologic settings and ground-water flow simulations for regional studies of the transport of anthropogenic and natural contaminants to public-supply wells--studies begun in 2001: U.S. Geological Survey Professional Paper 1737-A, p. 2-1 to 2-22. Available Online
Stewart, Jana S., 1994, Assessment of alternative methods for stratifying landsat TM data to improve land cover classification accuracy across areas with physiographic variation: University of Wisconsin-Madison, Master of Science thesis, 159 p.
Steuer, J.J., Bales, J.D., and Giddings, E.M.P., 2009, Relationship of stream ecological conditions to simulated hydraulic metrics across a gradient of basin urbanization: Journal North American Benthological Society, vol. 28, no. 4, p. 955-976. doi: 10.1899/08-157.1 Available Online
Steuer, J.J. Stensvold, K.A., and Gregory, M.B., 2010, Determination of biologically significant hydrologic condition metrics in urbanizing watersheds: an empirical analysis over a range of environmental settings: Hydrobiologia, vol. 654, no. 1, 34 p., online only. doi: 10.1007/s10750-010-0362-0 Available Online
Steuer, J.J., 2010, A generalized watershed disturbance-invertebrate relation applicable in a range of environmental settings across the continental United States: Urban Ecosystems, 10 p. doi: 10.1007/s11252-010-0131-x Available Online
Stets, E.G., Kelly, V.J., Broussad, W.P., III, Smith, T.E., and Crawford, C.G., 2012, Century-scale perspective on water quality in selected river basins of the conterminous United States: U.S. Geological Survey Scientific Investigations Report 2012-5225, 108 p. Available Online
Steele, G.V., Johnson, H.M., Sandstrom, M.W., Capel, P.D., and Barbash, J.E., 2008, Occurrence and fate of pesticides in four contrasting agricultural settings in the United States: Journal of Environmental Quality, vol. 37, p. 1116-1132. doi: 10.2134/jeq2007.0166 Available Online
Starn, Jeffrey, Bagtzoglou, Amvrossios C., 2011, Programs for calibration-based Monte Carlo simulation of recharge areas: Ground Water, online in advance of print, October 2011, 5 p. 10.1111/j.1745-6584.2011.00868.x Available Online
Starn, Jeffrey J., Bagtzoglou, Amvrossios C., and Robbins, Gary A., 2012, Methods for simulating solute breakthrough curves in pumping groundwater wells: Computers & Geoscience, online in advance of print, January 2012, 12 p. 10.1016/j.cageo.2012.01.011 Available Online
Starn, J.J., Bagtzoglou, A.C., and Robbins, G.A., 2010, Using atmospheric tracers to reduce uncertainty in groundwater recharge areas: Ground Water, vol. 48, no. 6, p. 858-868. doi: 10.1111/j.1745-6584.2010.00674.x Available Online
Stackelberg, Paul E., Barbash, Jack E., Gilliom, Robert J., Stone, Wesley W., and Wolock David M., 2012, Regression models for estimating concentrations of atrazine plus deethylatrazine in shallow groundwater in agricultural areas of the United States: Journal of Environmental Quality, vol. 41, no. 2, 16 p. doi:10.2134/jeq2011.0200 Available Online
Stackelberg, P.E., Gilliom, R.J., Wolock, D.M., and Hitt, K.J., 2006, Development and application of a regression equation for estimating the occurrence of atrazine in shallow ground water beneath agricultural areas of the United States: U.S. Geological Survey, Scientific Investigations Report 2005-5287, 12 p. Available Online
Squillace, Paul J., Zogorski, John S., Wilber, William G., and Price, Curtis V., 1995, A preliminary assessment of the occurrence and possible sources of MTBE in ground water of the United States, 1993-94: U.S. Geological Survey Open-File Report 95-456, 15 p. Available Online
Squillace, Paul J., Zogorski, John S., Wilber, William G., and Price, Curtis V., 1996, A preliminary assessment of the occurrence and possible sources of MTBE in ground water of the United States, 1993-94: Environmental Science and Technology, vol. 30, no. 5, (also published as USGS Open-File Report 95-456), p. 1721-1730. doi: 10.1021/es9507170 Available Online
Squillace, Paul J., Scott, Jonathon, Moran, Michael J., Nolan, B.T., and Kolpin, Dana W., 2002, VOCs, pesticides, nitrate, and their mixtures in groundwater used for drinking water in the United States: Environmental Science & Technology, vol. 36, no. 9, p. 1923-1930. doi: 10.1021/es015591n Available Online
Squillace, Paul J., Pope, Daryll A., and Price, Curtis A., 1995, Occurrence of the gasoline additive MTBE in shallow ground water in urban and agricultural areas: U.S. Geological Survey Fact Sheet 114-95, 4 p. Available Online
Squillace, Paul J., Pankow, James F., Korte, Nic E., and Zogorski, John S., 1997, Review of the environmental behavior and fate of methyl tert-butyl ether: Environmental Toxicology and Chemistry, vol. 16, no. 9, September 1997, p. 1836-1844. doi: 10.1897/1551-5028(1997)016<1836:ROTEBA>2.3.CO;2 Available Online
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