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Clark, Gregory M., Mueller, David K., and Mast M. Alisa, 2000, Nutrient concentrations and yields in undeveloped stream basins of the United States: Journal of the American Water Resources Association, vol. 36, no. 4, August 2000, p. 849-860.  doi: 10.1111/j.1752-1688.2000.tb04311.x Available Online

Cuffney, Thomas F., Meador, Michael R., Porter, Stephen D., and Gurtz, Martin E., 2000, Responses of physical, chemical, and biological indicators of water quality to a gradient of agricultural land use in the Yakima River Basin, Washington: Environmental Monitoring and Assessment, vol. 64, p. 259-270.  doi: 10.1023/A:1006473106407 Available Online

Hoos, Anne B., Robinson, John A., Aycock, Robert A., Knight, Rodney, R., and Woodside, Michael D., 2000, Sources, instream transport, and trends of nitrogen, phosphorus, and sediment in the Lower Tennessee River Basin, 1980-96: U.S. Geological Survey Water-Resources Investigations Report 99-4139, 96 p.  Available Online

Nolan, Bernard T., and Stoner, Jeffrey D., 2000, Nutrients in groundwaters of the conterminous United States, 1992-1995: Environmental Science and Technology, vol. 34, no. 7, p. 1156-1165.  doi: 10.1021/es9907663 Available Online

Robertson, Dale M., and Richards, Kevin D., 2000, Influence of different temporal sampling strategies on estimating loads and maximum concentrations in small streams: Conference Proceedings NWQMC National Monitoring Conference 2000, Monitoring for the Millennium, p. 209-223. 

Squillace, Paul J., and Moran, Michael J., 2000, Estimating the likelihood of MTBE occurrence in drinking water supplied by ground-water sources in the Northeast and Mid-atlantic regions of the United States: U.S. Geological Survey Open-File Report 00-343, 10 p.  Available Online

Sullivan, Daniel J., 2000, Fish communities and their relation to environmental factors in the Eastern Iowa Basins in Iowa and Minnesota, 1996: U.S. Geological Survey Water-Resources Investigations Report 00-4194, 20 p.  Available Online

Trench, Elaine C. Todd, 2000, Nutrient sources and loads in the Connecticut, Housatonic, and Thames River Basins: U.S. Geological Survey Water-Resources Investigations Report 99-4236, 66 p.  Available Online

Waite, Ian R., and Carpenter, Kurt D., 2000, Associations among fish assemblage structure and environmental variables in Willamette Basin stream, Oregon: Transactions of the American Fisheries Society, vol. 129, no. 3, p. 754-770.  doi: 10.1577/1548-8659(2000)129<0754:AAFASA>2.3.CO;2 Available Online

Alexander, R.B., Brakebill, J.W., Brew, R.E., and Smith, R.A., 1999, ERF1-Enhanced River Reach File 1.2: U.S. Geological Survey Open-File Report 99-457, map.  Available Online

Burkart, M.R., Kolpin, D.W., and James, D.E., 1999, Assessing groundwater vulnerability to agrichemical contamination in the Midwest US: Water Science & Technology, vol. 39, no. 3, p. 103-112.  Available Online

Burow, Karen R., Panshin, Sandra Y., Dubrovsky, Neil.M., Vanbrocklin, David, and Fogg, Graham E., 1999, Evaluation of processes affecting 1,2-dibromo-3- chloropropane (DBCP) concentrations in ground water in the eastern San Joaquin Valley, California: Analysis of chemical data and ground-water flow and transport simulations: U.S. Geological Survey Water-Resources Investigations Report 99-4059, 57 p.  Available Online

Frick, E.A., and Buell, Gary R., 1999, Relation of land use to nutrient and suspended-sediment concentrations, loads, and yields in the upper Chattahoochee River Basin, Georgia, 1993-98: in Hatcher, K.J., ed., U.S. Geological Survey reprints from proceedings of the 1999 Georgia Water Resources Conference, March 30-31,1999 The University of Georgia, Athens, Georgia, p. 170-179. 

Kennen, Jonathan G., 1999, Relation of macroinvertebrate community impairment to catchment characteristics in New Jersey streams: Journal of the American Water Resources Association, vol. 35, no. 4, p. 939-955  doi: 10.1111/j.1752-1688.1999.tb04186.x Available Online

Puckett, Larry J., Cowdery, T.K., Lorenz, D.L., and Stoner, J.D., 1999, Estimation of nitrate contamination of an Agro-Ecosystem Outwash Aquifer using a nitrogen mass-balance budget: Journal of Environmental Quality, vol. 28, no. 6, Nov.-Dec. 1999, p. 2015-2025.  Available Online

Rupert, Michael G., 1999, Improvements to the DRASTIC ground-water vulnerability mapping method: U.S. Geological Survey Fact Sheet 066-99, 6 p.  Available Online

Coupe, R.H., 1998, Concentrations and loads of nitrogen and phosphorus in the Yazoo River, northwestern Mississippi, 1996-97: U.S. Geological Survey Water-Resources Investigations Report 98-4219, 17 p.  Available Online

Hanson, Paul E., 1998, Pesticides and nitrates in surficial sand and gravel aquifers as related to modeled contamination susceptibility in part of the Upper Mississippi River Basin: U.S. Geological Survey Fact Sheet FS 107-98, 4 p.  Available Online

Nolan, Bernard T., 1998, Modeling approaches for assessing the risk of nonpoint- source contamination of ground water: U.S. Geological Survey Open-File Report 98-531, 15 p.  Available Online

Nolan, Bernard T., Ruddy, Barbara C., Hitt, Kerie J., and Helsel, Dennis R., 1998, A National look at nitrate contamination of ground water: Water Conditioning & Purification, vol. 39, no. 12, January 1998, p. 76-79.  Available Online

Saad, David A., and Thorstenson Donald C., 1998, Flow and geochemistry along shallow ground-water flowpaths in an agricultural area in southeastern Wisconsin: U.S. Geological Survey Water-Resources Investigations Report 98-4179, 62 p.  Available Online

Tesoriero, Anthony J., Inkpen, Emily L., and Voss, Frank D., 1998, Assessing groundwater vulnerability using logistic regression: Source Water Assessment and Protection 98, A Technical Conference April 28-20,1998, p. 157-165.  Available Online

Ashbury, Clyde E., and Oaksford, Edward T., 1997, A comparison of drainage basin nutrient inputs with instream nutrient loads for Seven Rivers in Georgia and Florida, 1986-90: U.S. Geological Survey Water-Resources Investigations Report 97-4006, 8 p.  Available Online

Burow, K.R., Weissmann, G.S., Miller, R.D., and Placzek, G., 1997, Hydrogeologic facies characterization of an alluvial fan near Fresno, California, using geophysical techniques: U.S. Geological Survey Open-File Report 97-46, 15 p.  Available Online

Erwin, M.L., and Tesoriero, A.J., 1997, Predicting ground-water vulnerability to nitrate in the Puget Sound Basin: U.S. Geological Survey Fact Sheet 061-97, 4 p.  Available Online

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