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Stone, W.W., Crawford, C.G., and Gilliom, R.J, 2013, Watershed Regressions for Pesticides (WARP) models for predicting stream concentrations of multiple pesticides: Journal of Environmental Quality, vol. 42 no. 6, p. 1838-1851.   doi:10.2134/jeq2013.05.0179 Available Online

Stone, W.W., and Gilliom, R.J., 2012, Watershed Regressions for Pesticides (WARP) models for predicting atrazine concentrations in corn belt streams: Journal of the American Water Resources Association, vol. 48, no. 5, p. 970-986.  doi: 10.1111/j.1752-1688.2012.00661.x Available Online

Stone, Wesley W., and Gilliom, Robert J., 2011, Watershed regressions for pesticides (WARP) for predicting atrazine concentration in Corn Belt streams: U.S. Geological Survey Open-File Report 2011-1141, 18 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

Nolan, Bernard T., and Hitt, Kerie J., 2006, Vulnerability of shallow groundwater and drinking-water wells to nitrate in the United States: Environmental Science and Technology, vol. 40, no. 24, p. 7834-7840.  doi: 10.1021/es060911u Available Online

Gurdak, J.J., and Qi, S.L., 2006, Vulnerability of Recently Recharged Ground Water in the High Plains Aquifer to Nitrate Contamination: USGS Scientific Investigations Report 2006-5050, 39 p.  Available Online

Volwimkel, E.F., Clawges, R.M., Buxton, D.E., Stedfast, D.A., and Louis, J.B., 1996, Vulnerability of public drinking water supplies in New Jersey to pesticides: U.S. Geological Survey Fact Sheet FS-165-96, 4 p.  Available Online

McMahon, P.B., 2001, Vertical gradients in water chemistry in the Central High Plains Aquifer, southwestern Kansas and Oklahoma Panhandle, 1999: U.S. Geological Survey Water-Resources Investigations Report 01-4028, 47 p.  Available Online

McMahon, P.B., Böhlke, J.K., and Lehman, T.M., 2004, Vertical gradients in water chemistry and age in the southern High Plains aquifer, Texas, 2002: U.S. Geological Survey Scientific Investigations Report 2004-5053, 53 p.  Available Online

McMahon, P.B., Böhlke, J.K., and Carney, C.P., 2007, Vertical gradients in water chemistry and age in the northern High Plains aquifer, Nebraska, 2003: U.S. Geological Survey Scientific Investigations Report 2006-5294, 58 p.  Available Online

Nolan, B.T., Malone, RW., Gronberg, J.A., Thorp, K.R., and Ma, L., 2011, Verifiable metamodels for nitrate losses to drains and groundwater in the Corn Belt, USA: Environmental Science and Technology, online in advance of print, 8 p.  doi: 10.1021/es202875e Available Online

Saleh, D.K., Kratzer, C.R., Green, C.H., and Evans, D.G., 2009, Using the Soil and Water Assessment Tool (SWAT) to simulate runoff in Mustang Creek Basin, California: U.S. Geological Survey Scientific Investigations Report 2009-5031, 28 p.  Available Online

Essaid, H.I., Zamora, C.M., McCarthy, K.A., Vogel, J.R., and Wilson, J.T. , 2008, Using heat to characterize streambed water flux variability in four stream reaches: Journal of Environmental Quality 2008 (37), p. 1010-1023.  doi: 10.2134/jeq2006.0448 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

Thoms, R.B., Johnson, R.L., and Healy, R.W., 2006, User's guide to the variably saturated flow (VSF) process for MODFLOW: U.S. Geological Survey Techniques and Methods, 6-A18, 58 p.  Available Online

Barlow, Jeannie R.B., and Coupe, Richard H., 2009, Use of heat to estimate streambed fluxes during extreme hydrologic events: Water Resources Research, vol. 45, W01403, 10 p.  doi: 10.1029/2007WR006121 Available Online

Barlow, J.R.B., and Coupe, R.H., 2008, Use of heat to estimate streambed fluxes during extreme events: Water Resources Research, vol. 45, WO1403, 10 p.  doi: 10.1029/2007WR006121 Available Online

Robertson, Dale M., 1996, Use of frequency-volume analyses to estimate regionalized yields and loads of sediment, phosphorus, and polychlorinated biphenyls to Lakes Michigan and Superior: U.S. Geological Survey Water-Resources Investigations Report 96-4092, 47 p.  Available Online

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

Coupe, Richard H., 2007, Use of a watershed model to characterize the fate and transport of fluometuron, a soil-applied cotton herbicide, in surface water: International Journal of Environmental Analytical Chemistry, vol. 87, no. 13, p. 883-896.  doi: 10.1080/03067310701627819 Available Online

Short, T.M., Giddings, E.M.P., Zappia, Humbert, and Coles, J.F., 2005, Urbanization effects on stream habitat characteristics in: Boston, Massachusetts; Birmingham, Alabama, and Salt Lake City, Utah: 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. 317-332.  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

Rebich, R.A., and Demcheck, D.K., 2007, Trends In Nutrient and Sediment Concentrations and Loads In Major River Basins of the South-Central United States, 1993-2004: USGS Scientific Investigations Report 2007-5090, 112 p.  Available Online

Puckett, L.J., and Hughes, W.B., 2005, Transport and Fate of Nitrate and Pesticides: Hydrogeology and Riparian Zone Processes: Journal of Environmental Quality, vol. 34, no. 6, p 2278-2292.  doi: 10.2134/jeq2005.0109 Available Online

Rowe, G.L., Jr., Gilliom, R.J., and Woodside, M.D., 2013, Tracking and forecasting the Nation's water quality--Priorities and strategies for 2013-2023: U.S. Geological Survey Fact Sheet 2013-3008, 6 p.  Available Online

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