National Water-Quality Assessment (NAWQA) Program
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Nutrients National Synthesis
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Effects of Nutrient Enrichment on Stream Ecosystems |
Sources, Transport, and Fate of Agricultural Chemicals
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Showing results 251 to 276 of 648.
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Miller, Lynn K., Moquino, Robert L., and Hill, Bruce A., 1997, Water-quality assessment of the Rio Grande Valley, Colorado, New Mexico, and Texas--Water-quality data for water-column, suspended-sediment, and bed-material samples collected at selected surface-water sites in the upper Rio Grande Basin, June and September 1994: U.S. Geological Survey Open-File Report 97-644, 18 p. Available Online
Miller, K.A., Clark, M.L., and Wright, P.R., 2005, Water-quality assessments of the Yellowstone River Basin, Montana and Wyoming - Water quality of fixed sites, 1999-2001: U.S. Geological Survey Scientific Investigations Report 2004-5113, 82 p. Available Online
Miller, Cherie V., Denis, Janet M., Ator, Scott W., and Brakebill, John W., 1997, Nutrients in streams during baseflow in selected environmental settings of the Potomac River Basin: Journal of the American Water Resources Association, vol. 33, no. 6, p. 1155-1171. doi: 10.1111/j.1752-1688.1997.tb03543.x Available Online
McPherson, Benjamin F., Miller, Ronald L., Haag, Kim H., and Bradner, Anne, 2000, Water quality in southern Florida, 1996-98: U.S. Geological Survey Circular 1207, 32 p. Available Online
McPherson, Ann K., Moreland, Richard S., and Atkins, J. Brian, 2003, Occurrence and distribution of nutrients, suspended sediment, and pesticides in the Mobile River Basin, Alabama, Georgia, Mississippi, and Tennessee, 1999-2001: U.S. Geological Survey Water-Resources Investigations Report 03-4203, 101 p. Available Online
McMahon, Peter B., Lull, Kenneth J., Dennehy, Kevin F., and Collins, Jim A., 1995, Quantity and quality of ground-water discharge to the South Platte River, Denver to Fort Lupton, Colorado, August 1992 through July 1993: U.S. Geological Survey Water-Resources Investigations Report 95-4110, 71 p. Available Online
McMahon, P.B., Litke, D.W., Paschal, J.E., and Dennehy, K.F., 1994, Ground water as a source of nutrients and atrazine to streams in the South Platte River Basin: American Water Resources Association Water Resources Bulletin, vol. 30, no. 3, p. 521-530. doi: 10.1111/j.1752-1688.1994.tb03310.x Available Online
McMahon, P.B., Dennehy, K.F., Michel, R.L, Sophocleous, M.A., Ellett, K.M., and Hurlbut, D.B., 2003, Water movement through thick unsaturated zones overlying the central High Plains aquifer, southwestern Kansas, 2000-2001: U.S. Geological Survey Water-Resources Investigations Report 03-4171, 32 p. 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
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, vol. 42, W03413, 18 p. doi: 10.1029/2005WR004417 Available Online
McMahon, P.B., Burow K.R., Kauffman, L.J.,Eberts, S.M., Bohlke, J.K., and Gurdak, J.J., 2008, Simulated response of water quality in public supply wells to land use change: Water Resources Research, vol. 44, W00A06, 16 p. doi: 10.1029/2007WR006731 Available Online
McMahon, P.B., Bruce, B.W., Becker, M.F., Pope, L.M., and Dennehy, K.F., 2000, Occurrence of nitrous oxide in the Central High Plains Aquifer,1999: Environmental Science and Technology, vol. 34, no. 23, p. 4873-4877. doi: 10.1021/es001233t Available Online
McMahon, P.B., Bohlke, J.K., Kauffman, L.J., Kipp, K.L., Landon, M.K., Crandall, C.A., Burow, K.R., and Brown, C.J., 2008, Source and transport controls on the movement of nitrate to public supply wells in selected principal aquifers of the United States: Water Resources Research, vol. 44, W04401, 17 p. doi: 10.1029/2007WR006252 Available Online
McMahon, P.B., Bohlke, 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., Bohlke, J.K., and Christenson, S.C., 2004, Geochemistry, radiocarbon ages, and paleorecharge conditions along a transect in the central High Plains aquifer, southwestern Kansas, USA: Applied Geochemistry, vol. 19, p. 1655-1686. doi: 10.1016/j.apgeochem.2004.05.003 Available Online
McMahon, P.B., Bohlke, 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
McMahon, P.B., Bohlke, J.K., and Bruce, B.W., 1999, Denitrification in marine shales in northeastern Colorado: Water Resources Research, vol. 35, no. 5, May 1999, p. 1629-1642. doi:10.1029/1999WR900004 Available Online
McMahon, P.B., and Dennehy, K.F., 1999, N2O emissions from a nitrogen-enriched river: Environmental Science & Technology, vol. 33, no. 1, p. 21-25. doi: 10.1021/es980645n Available Online
McMahon, P.B., and Chapelle, F.H., 2008, Redox processes and water quality of selected principal aquifer systems: Ground Water, vol. 46, no. 2, 13 p. doi: 10.1111/j.1745-6584.2007.00385.x Available Online
McMahon, P.B., and Bruce, B.W., 1997, Distribution of terminal electron- accepting processes in an aquifer having multiple contaminant sources: Applied Geochemistry, vol. 12, p. 507-516. doi: 10.1016/S0883-2927(97)00029-2 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, vol. 40, p. 2965-2970. doi: 10.1021/es052229q Available Online
McMahon, P.B., and Bohlke, J.K., 1996, Denitrification and mixing in a stream-aquifer system: Effects on nitrate loading to surface water: Journal of Hydrology, vol. 186, no. 1-4, p. 105-128. doi: 10.1016/S0022-1694(96)03037-5 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., 2000, A reconnaissance study of the effect of irrigated agriculture on water quality in the Ogallala Formation, central High Plains: U.S. Geological Survey Fact Sheet FS-009-00, 6 p. Available Online
McMahon, P.B., 2012, Use of classes based on redox and groundwater age to characterize the susceptibility of principal aquifers to changes in nitrate concentrations, 1991 to 2010: U.S. Geological Survey Scientific Investigations Report 2012-5220, 41 p. Available Online
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