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Showing results 676 to 701 of 929.
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Rose, Donna L., and Sandstrom, Mark W., 2003, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory: determination of gasoline oxygenates, selected degradates, and BTEX in water by heated purge and trap/gas chromatography/mass spectrometry: U.S. Geological Survey Water-Resources Investigations Report 2003-4079, 31 p.  Available Online

Schwarz, Gregory, Smith, Richard, Alexander, Richard, Gray, John, 2003, Recent progress in the development of a SPARROW model of sediment for the conterminous US: conference paper, 6 p.  doi:gov/publication/70120643 Available Online

Schwarz, Gregory, Smith, Richard, Alexander, Richard, Gray, John, 2003, Recent progress in the development of a SPARROW model of sediment for the conterminous US: conference paper, 6 p.  doi:gov/publication/70120643 Available Online

Smith, R A, Alexander, R B, Schwarz, G E, 2003, Natural background concentrations of nutrients in streams and rivers of the conterminous United States: climatic conditions/basin sizes, 9 p.  10.1021/es020663b Available Online

Smith, RA, Alexander, RB, Schwarz, GE, 2003, Natural background concentrations of nutrients in streams and rivers of the conterminous United States: nutrients in streams and rivers, 9 p.  10.1021/es020663b Available Online

Toccalino, Patricia, Nowell, Lisa, Wilber, William, Zogorski, John, Donohue, Joyce, Eiden, Catherine, Krietzman, Sandra, and Post, Gloria, 2003, Development of health-based screening levels for use in state- or local- scale water-quality assessments: U.S. Geological Survey Water-Resources Investigations Report 03-4054, 22 p.  Available Online

Welch, Alan H., and Stollenwerk, Kenneth G., eds., 2003, Arsenic in ground water-- geochemistry and occurrence: Boston, Kluwer Academic Publishers, 475 p.  Available Online

Wolock, David, 2003, Flow characteristics at U.S. Geological Survey streamgages in the conterminous United States: streamgages, 0 p.  doi:gov/publication/ofr03146 Available Online

Wolock, David M, 2003, Base-Flow Index Grid for the Conterminous United States: Open-File Report 2003-263, 0 p.  doi:gov/publication/ofr03263 Available Online

Wolock, David M, 2003, Estimated Mean Annual Natural Ground-Water Recharge in the Conterminous United States: digital dataset on streamflow, 0 p.  doi:gov/publication/ofr03311 Available Online

Wolock, David M, 2003, Hydrologic landscape regions of the United States: dataset, 0 p.  doi:gov/publication/ofr03145 Available Online

Wolock, David M, 2003, Infiltration-Excess Overland Flow Estimated by TOPMODEL for the Conterminous United States: dataset, 0 p.  doi:gov/publication/ofr03310 Available Online

Wolock, David M, 2003, Saturation overland flow estimated from TOPMODEL for the conterminous United States: digital dataset, 0 p.  doi:gov/publication/ofr03264 Available Online

Alexander, RB, Johnes, PJ, Boyer, EW, Smith, RA, 2002, A comparison of models for estimating the riverine export of nitrogen from large watersheds: Biogeochemistry, 44 p.  10.1023/A:1015752801818 Available Online

Alexander, Richard B., Johnes, Penny J., Boyer, Elizabeth W., and Smith, Richard A., 2002, A comparison of models for estimating the riverine export of nitrogen from large watersheds: Biogeochemistry, vol. 57, no. 58, p. 295-339.  doi: 10.1023/A:1015752801818 Available Online

Couch, Carol and Hamilton, Pixie, 2002, Effects of urbanization on stream ecosystems: U.S. Geological Survey Fact Sheet FS-042-02, 2 p.  Available Online

Dennehy, K.F., Litke, D.W., and McMahon, P.B., 2002, The High Plains aquifer, USA: Groundwater development and sustainability: In Hiscock, K.M., Rivett, M.O., and Davison, R.M. (eds.), Sustainable Groundwater Development, Geological Society, London, Special Publications, 193, p. 99-119. 

Erwin, Martha L., and Hamilton, Pixie A., 2002, Monitoring our rivers and streams: U.S. Geological Survey Fact Sheet 077-02, 4 p.  Available Online

Gilliom, Robert J., Mueller, David K., Zogorski, John S., and Ryker, Sarah J., 2002, A national look at water quality: Water Resources Impact, vol. 4, no. 4, July 2002, p. 12-16.  Available Online

Hamilton, Pixie, 2002, Water-quality patterns in some of the Nation's major river basins and aquifers: Water Resources Impact, vol. 4, no. 4, July 2002, p. 5-11.  Available Online

Hamilton, Pixie, and Miller, Timothy L., 2002, Managing the water above & below: Geotimes, May 2002, p. 21-24.  Available Online

Juracek, K E, Wolock, D M, 2002, Spatial and statistical differences between 1:250,000 - and 1:24,000 - scale digital soil databases: soil attributes, 6 p.  doi:gov/publication/70025113 Available Online

Kolpin, D.W., Barbash, J.E. and Gilliom, R.J., 2002, Atrazine and metolachlor occurrence in shallow groundwater of the United States, 1993-95: Journal of the American Water Resources Association, vol. 38, no.1, p. 301-311.  doi: 10.1111/j.1752-1688.2002.tb01553.x Available Online

Krabbenhoft, David P, Olson, Mark L, DeWild, John F, Clow, David W, Striegl, Robert G, Dornblaser, Mark M, Van Metre, Peter C, 2002, Mercury loading and methylmercury production and cycling in high-altitude lakes from the Western United States: water, air and soil pollution, 17 p.  10.1023/A:1020162811104 Available Online

Madsen, James F., Sandstrom, Mark W., and Zaugg, Steven D., 2002, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory; a method supplement for the determination of Fipronil and degradates in water by gas chromatography/mass spectrometry: U.S. Geological Survey Open-File Report 2002-462, 11 p.  Available Online

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