National Water-Quality Assessment (NAWQA) Program
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Showing results 376 to 401 of 606.
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Hirsch, Robert M., Hamilton, Pixie A., and Miller, Timothy L., 2006, U.S. Geological Survey perspective on water-quality monitoring and assessment: Journal of Environmental Monitoring, vol. 8, p. 512-518. doi: 10.1039/b603613a Available Online
Hirsch, Robert M., Hamilton, Pixie A., and Miller, Timothy L., 2006, The increasing need for science to inform policy - more than 30 years after passage of the Clean Water Act: Water Environment Research, vol. 78, no. 9, October 2006, p. 899-900. Available Online
Hirsch, R.M., Alley, W.M., and Wilber, W.G., 1988, Concepts for a National Water-Quality Assessment Program: U.S. Geological Survey Circular 1021, 42 p. Available Online
Hirsch, R.M., Alley, W.M., and Wilber, W.G., 1988, A summary of the U.S. Geological Survey National Water-Quality Assessment Program: U.S. Geological Survey Open-File Report 88-95, 7 p. Available Online
Hinkle, S.R., Shapiro, S.D., Plummer, L.N., Busenberg, Eurybiades, Widman, P.K., Casile, G.C., and Wayland, J.E., 2010, Estimates of tracer-based piston-flow ages of groundwater from selected sites--National Water-Quality Assessment Program, 1992-2005: U.S. Geological Survey Scientific Investigations Report 2010-5229, 90 p. Available Online
Hinkle, S.R., Kauffman, L.J., Thomas, M.A., Brown, C.J., McCarthy, K.A., 2009, Combining particle-tracking and geochemical data to assess public supply well vulnerability to arsenic and uranium: Journal of Hydrology, vol. 376, p. 132-142. Available Online
Hill, R.A., Hawkins, C.P., Carlisle, D.M., 2013, Predicting thermal reference conditions for USA streams and rivers: Freshwater Science, vol. 32, p. 39-55. doi: 10.1899/12-009.1 Available Online
Harned, D., Cuffney, T., Schueler, T., and McMahon, L., 2010, Stormwater, Impervious Surface, and Stream Health: U.S. Geological Survey Multimedia Gallery Home Video 298, 9:40 minutes. Available Online
Hancock, T.C., Sandstrom, M.W., Vogel, J.R., Webb, R.M.T., Bayless, E.R., and Barbash, J.E., 2008, Pesticide fate and transport throughout unsaturated zones in five agricultural settings, USA: Journal of Environmental Quality, vol. 37, p. 1086-1100. doi: 10.2134/jeq2007.0024 Available Online
Hamilton, Pixie. A., Miller, Timothy L., and Myers, Donna N., 2004, Water quality in the Nation's streams and aquifers - Overview of selected findings, 1991-2001: U.S. Geological Survey Circular 1265, 20 p. Available Online
Hamilton, Pixie, and Miller, Timothy L., 2002, Managing the water above & below: Geotimes, May 2002, p. 21-24. Available Online
Hamilton, Pixie, 2000, Water quality: Why geology matters: Geotimes, June 2000, p. 20-23.
Hamilton, Pixie, 2000, Fertile research: The U.S. Geological Survey's National Water-Quality Assessment Program provides food for thought on the variability of water quality across the nation: Water Environment and Technology, vol. 12, no. 2, p. 26-32.
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, P.A., Welch, A.H., Christenson, S.C., and Alley W.M., 1993, Uses and limitations of existing ground-water-quality data in Alley, W.M., ed.: Regional Ground-Water Quality: New York, Van Nostrand Reinhold, p. 613-622.
Hamilton, P.A., 1992, National Water-Quality Assessment: Public outreach and involvement: U.S. Geological Survey Yearbook, Fiscal Year 1992, p.42-45.
Gurdak, Jason J., Walvoord, Michelle A., and McMahon, Peter B., 2008, Susceptibility to enhanced chemical migration from depression-focused preferential flow, High Plains aquifer: Vadose Zone Journal, vol. 7, no. 4, p. 1172-1184. doi: 10.2136/vzj2007.0145 Available Online
Gurdak, J.J., McCray, J.E., Thyne, G.D., and Qi, S.L., 2007, Latin hypercube approach to estimate uncertainty in ground water vulnerability: Ground Water, vol. 45, p. 348-361. doi: 10.1111/j.1745-6584.2006.00298.x Available Online
Gross, E.L., Lindsey, B.D., and Rupert, M.G., 2012, Quality of major ion and total dissolved solids data from groundwater sampled by the National Water-Quality Assessent Program, 1992-2010: U.S. Geological Survey Scientific Investigations Report 2011-5153, 26 p. Available Online
Green, C.T., Puckett, L.J., Bohlke, J.K., Bekins, B.A., Phillips, S.P., Kauffman, L.J., Denver, J.M., and Johnson, H.M., 2008, Limited occurrence of denitrification in four shallow aquifers in agricultural areas of the United States: Journal of Environmental Quality, vol. 37, p. 994-1009. doi: 10.2134/jeq2006.0419 Available Online
Green, C.T., Fisher, L.H., and Bekins, B.A., 2008, Nitrogen fluxes through unsaturated zones in five agricultural settings across the United States: Journal of Environmental Quality, vol. 37, p. 1073-1085. doi: 10.2134/jeq2007.0010 Available Online
Green, C.T., Bohlke, J.K., Bekins, B.A., and Phillips, S.P., 2010, Mixing effects on apparent reaction rates and isotope fractionation during denitrification in a heterogeneous aquifer: Water Resources Research, vol. 46, W08525, 19 p. doi: 10.1029/2009WR008903 Available Online
Green, C.T., and Bekins, B.A., 2010, Sustainability of natural attenuation of nitrate in agricultural aquifers: U.S. Geological Survey Fact Sheet 2010-3077, 4 p. Available Online
Grandon, Ron (EESI), 2001, Sprawl leaves its footprint in water: Environmental and Energy Study Institute (EESI), May 2001, 2 p.
Graffy, Elisabeth A., Helsel, Dennis R., and Mueller, David K., 1996, Nutrients in the Nation's waters: Identifying problems and progress: U.S. Geological Survey Fact Sheet 218-96, 6 p. Available Online
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