National Water-Quality Assessment (NAWQA) Program
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Groschen, George E., Arnold, Terri L., Morrow, William S., and Warner, Kelly L., 2009, Occurrence and distribution of iron, manganese, and selected trace elements in ground water in the glacial aquifer system of the Northern United States: U.S. Geological Survey Scientific Investigations Report 2009-5006, 89 p. Available Online
Gurdak, J.J., McMahon, P.B., Dennehy, K.F., and Qi, S.L., 2009, Water quality in the High Plains aquifer, Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming, 1999-2004: U.S. Geological Survey Circular 1337, 63 p. Available Online
Lorenz, D.L., Robertson, D.M., Hall, D.W., and Saad, D.A., 2009, Trends in streamflow and nutrient and suspended-sediment concentrations and loads in the Upper Mississippi, Ohio, Red, and Great Lakes River Basins, 1975-2004: U.S. Geological Survey Scientific Investigations Report 2008-5213, 81 p. Available Online
Mullaney, J.R., Lorenz, D.L., Arntson, A.D., 2009, Chloride in groundwater and surface water in areas underlain by the glacial aquifer system, northern United States: U.S. Geological Survey Scientific Investigations Report 2009-5086, 41 p. Available Online
Robertson, Dale M., Schwarz, Gregory E., Saad, David A., and Alexander, Richard B., 2009, Incorporating Uncertainty into the Ranking of SPARROW Model Nutrient Yields from the Mississippi/Atchafalaya River Basin Watersheds: Journal of the American Water Resources Association, Vol. 45, No. 2, April 2009, p. 534-549. doi: 10.1111/j.1752-1688.2009.00310.x Available Online
Sullivan, D.J., Vecchia, A.V., Lorenz, D.L., Gilliom, R.J., and Martin, J.D., 2009, Trends in pesticide concentrations in corn-belt streams, 1996-2006: U.S. Geological Survey Scientific Investigations Report 2009-5132, 75 p. Available Online
Vecchia, Aldo V., Gilliom, Robert J., Sullivan, Daniel J., Lorenz, David L., and Martin, Jeffrey D., 2009, Trends in concentrations and use of agricultural herbicides for Corn Belt rivers, 1996-2006: Environmental Science & Technology, accepted Oct. 20, 2009, 7 p. doi: 10.1021/es902122j Available Online
Alexander, R.B., Smith, R.A., Schwarz, G.S., Boyer, E.W., Nolan, J.V., and Brakebill, J.W., 2008, Differences in phosphorus and nitrogen delivery to the Gulf of Mexico from the Mississippi River Basin: Environmental Science and Technology, v. 42, no. 3, p. 822-830. doi: 10.1021/es0716103 Available Online
Arnold, T.L., Warner, K.L., Groschen, G.E., Caldwell, J.P., and Kalkhoff, S.J., 2008, Hydrochemical regions of the glacial aquifer system, northern United States, and their environmental and water-quality characteristics: U.S. Geological Survey Scientific Investigations Report 2008-5015, 84 p. Available Online
U.S. Geological Survey, 2008, Relations of Water Quality to Agricultural Chemical Use and Environmental Setting at Various Scales - Results from Selected Studies of the National Water-Quality Assessment Program: U.S. Geological Survey Fact Sheet FS 2007-3088, 6 p. Available Online
Ayotte, J.D., Flanagan, S.M., and Morrow, W.S., 2007, Occurrence of uranium and 222radon in glacial and bedrock aquifers in the northern United States, 1993-2003: U.S. Geological Survey Scientific Investigations Report 2007-5037, 84 p. Available Online
Gurdak, J.J., Hanson, R.T., McMahon, P.B., Bruce, B.W., McCray, J.E.,Thyne, G.D., and Reedy, R.C., 2007, Climate variability controls on unsaturated-zone water and chemical movement, High Plains aquifer: Vadose Zone Journal, 6, p. 533-547. doi: 10.2136/vzj2006.0087 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, 45, p. 348-361. doi: 10.1111/j.1745-6584.2006.00298.x Available Online
McMahon, P.B., Dennehy, K.F., Bruce, B.W., Gurdak, J.J., and Qi, S.L., 2007, Water-quality assessment of the High Plains aquifer, 1999-2004: U.S. Geological Survery Professional Paper 1749, 136 p. Available Online
Thomas, Mary Ann, 2007, The association of arsenic with redox conditions, depth, and ground-water age in the glacial aquifer system of the northern United States: U.S. Geological Survey Scientific Investigations Report 2007-5036, 26 p. Available Online
Weeks, E.P., and McMahon, P.B., 2007, Nitrous oxide fluxes from cultivated areas and rangeland: U.S. High Plains: Vadose Zone Journal, 6, p. 496-510. doi: 10.2136/vzj2006.0164 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
McMahon, P.B., and Bohlke, J.K., 2006, Regional patterns in the isotopic composition of natural and anthropogenic nitrate in ground water, High Plains, USA: Environmental Science & Technology, 40, p. 2965-2970. doi: 10.1021/es052229q Available Online
McMahon, P.B., Dennehy, K.F., Bruce, B.W., Bohlke, J.K., Michel, R.L., Gurdak, J.J., and Hurlbut, D.B., 2006, Storage and transit time of chemicals in thick unsaturated zones under rangeland and irrigated cropland, High Plains, United States: Water Resources Research, v. 42, W03413, 18 p. doi: 10.1029/2005WR004417 Available Online
Qi, S.L., and Gurdak, J.J., 2006, Percentage of probability of nonpoint-source nitrate contamination of recently recharged ground water in the High Plains aquifer: U.S. Geological Survey Digital Data Series, DDS-192, on-line only. Available Online
Sprague, Lori A., Clark, Melanie L., Rus, David L., Zelt, Ronald B, Flynn, Jennifer L., and Davis, Jerri V., 2006, Nutrient and Suspended-Sediment Trends in the Missouri River Basin, 1993-2003: U.S. Geological Survey Scientific Investigations Report 2006-5231, 80 p. Available Online
Stanton, J.S., and Qi, S.L., 2006, Ground-water quality of the northern High Plains aquifer, 1997, 2002-04: U.S. Geological Survey Scientific Investigations Report 2006-5138, 59 p. Available Online
Meador, Michael R., 2005, Single-pass versus two-pass boat electrofishing for characterizing river fish assemblages--Species richness estimates and sampling distance: Transactions of the American Fisheries Society, v. 134, p. 59-67. doi: 10.1577/FT03-094.1 Available Online
Warner, K.L., and Arnold, T.L., 2005, Framework for regional synthesis of water-quality data for the glacial aquifer system in the United States: U.S. Geological Survey Scientific Investigations Report 2005-5223, 6 p. Available Online
Coupe, Richard and Blomquist, Joel D., 2004, Water-soluble pesticides in finished water of community water supplies: Journal of the American Water Works Association, v. 96, no. 10, p. 56-68. Available Online
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