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Preston, S.D., Alexander, R.B., Schwarz, G.E., and Crawford, C.G., 2011, Factors affecting stream nutrient loads: A synthesis of regional SPARROW model results for the continental United States: Journal of the American Water Resources Association, online 22Aug2011 in advance of print, 25 p.  doi: 10.1111/j.1752-1688.2011.00577.x Available Online

Musgrove, MaryLynn, Katz, B.G., Fahlquist, L.S., Crandall, C.A., Lindgren, R.J., 2014, Factors affecting public-supply well vulnerability in two karst aquifers: Groundwater, vol. 52, p. 63-75.  doi: 10.1111/gwat.12201 Available Online

Nolan, B.T., Bayless, E.R., Green, C.T., Garg, S., Voss, F.D., Lampe, D.C., Barbash, J.E., Capel, P.D. and Bekins, B.A., 2005, Evaluation of unsaturated-zone solute-transport models for studies of agricultural chemicals: U.S. Geological Survey Open-File Report 2005-1196, 16 p.  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

Johnson, H.M., Black, R.W., and Wise, D.R., 2013, Estimation of total nitrogen and total phosphorus in streams of the Middle Columbia River Basin (Oregon, Washington, and Idaho) using SPARROW models, with emphasis on the Yakima River Basin, Washington: U.S. Geological Survey Scientific Investigations Report 2013-5199, 38 p.  Available Online

Capel, Paul D., and Zhang, Hua, 2000, Estimation of potential loss of two pesticides in runoff in Fillmore County, Minnesota using a field-scale process-based model and a geographic information system: in Steinheimer, Thomas, R., Ross, Lisa J., and Spittler, Terry D., eds., ACS Symposium Series 175-- Agrochemical fate and movement, Chapter 12, p. 172-184. 

Mullaney, John R., Schwarz, Gregory E., and Trench, Elaine C. Todd, 2002, Estimation of nitrogen yields and loads from basins draining to Long Island Sound, 1988-98: U.S. Geological Survey Water-Resources Investigations Report 02-4044, 84 p.  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

Carlisle, D.M., Meador, M.R., Moulton II, S.R., and Ruhl, P.M., 2007, Estimation and application of indicator values for common macroinvertebrate genera and families of the United States: Ecological Indicators, vol. 7, p. 22-33.  doi: 10.1016/j.ecolind.2005.09.005 Available Online

Lizarraga, Joy S., 1997, Estimation and analysis of nutrient and suspended- sediment loads at selected sites in the Potomac River Basin, 1993-95: U.S. Geological Survey Water-Resources Investigations Report 97-4154, 23 p.  Available Online

Wolock, David M., and Kauffman, Leon K., 2002, Estimating water-quality conditions in unmonitored water resources: Water Resources Impact, vol. 4, no. 4, July 2002, p. 26-31.  Available Online

Alexander, Richard B., Elliott, Alexander H., Shankar, Ude, and McBride, Graham B., 2002, Estimating the sources and transport of nutrients in the Waikato River Basin, New Zealand: Water Resources Research 2002, 23 p.  doi: 10.1029/2001WR000878 Available Online

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

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

Cuffney, T.F., Zappia, Humbert, Giddings, E.M.P., and Coles, J.R., 2005, Effects of urbanization on benthic macroinvertebrated assemblages in contrasting environmental settings: 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. 361-407.  Available Online

Calhoun, Daniel L., Frick, Elizabeth A., and Buell, Gary R., 2003, Effects of urban development on nutrient loads and streamflow, upper Chattahoochee River Basin, Georgia, 1976-2001: in Hatcher, K.J., ed., Proceedings of the 2003 Georgia Water Resources Conference, April 23-24, University of Georgia, Athens, Georgia, 5 p. 

Bexfield, L.M., Thiros, S.A., Anning, D.W., Huntington, J.M., and McKinney, T.S., 2011, Effects of natural and human factors on groundwater quality of basin-fill aquifers in the southwestern United States-conceptual models for selected contaminants: U.S. Geological Survey Scientific Investigations Report 2011-5020, 90 p. 

Kauffman, Leon J., Baehr, Arthur L., Ayers, Mark A., and Stackelberg, Paul E., 2001, Effects of land use and travel time on the distribution of nitrate in the Kirkwood-Cohansey aquifer system in southern New Jersey: U.S. Geological Survey Water-Resources Investigations Report 01-4117, 49 p.  Available Online

Zinn, B.A., and Konikow, L.F., 2007, Effects of intraborehole flow on groundwater age distribution: Hydrogeology Journal, vol. 15, no. 4, June, p. 633-643.  doi: 10.1007/s10040-006-0139-8 Available Online

Alexander, Richard B., Smith, Richard A., and Schwarz, Gregory E., 2000, Effect of stream channel size on the delivery of nitrogen to the Gulf of Mexico: Nature, vol. 403, February 17, 2000, p. 758-761.  Available Online

Tiedeman, C.R., and Green, C.T., 2013, Effect of correlated observation error on parameters, predictions, and uncertainty: Water Resources Research, vol. 49.  doi:10.1002/wrcr.20499 Available Online

Alexander, R.B., Böhlke, J.K., Boyer, E.W., David, M.B., Harvey, J.W., Mulholland, P.J., Seitzinger, S.P., Tobias, C.R., Tonitto, C., Wollheim, W.M., 2009, Dynamic modeling of nitrogen losses in river networks unravels the coupled effects of hydrological and biogeochemical processes : Biogeochemistry (2009) 93:91-116, p. 91-116.  doi: 10.1007/s10533-008-9274-8 Available Online

Van Metre, P.C., and Fuller, C.C., 2009, Dual-core mass-balance approach for evaluating mercury and 210Pb atmospheric fallout and focusing to lakes: Environmental Science and Technology, 43(1), p. 26-32.   doi: 10.1021/es801490c Available Online

Anning, D.W, and Flynn, M.E., 2014, Dissolved-solids sources, loads, yields, and concentrations in streams of the conterminous United States: U. S. Geological Survey Scientific Investigations Report 2014-5012, 101 p.  http://dx.doi.org/10.3133/sir20145012 Available Online

Anning, David W., 2008, Dissolved solids in basin-fill aquifers and streams in the southwestern United States--Executive Summary: U.S. Geological Survey Fact Sheet 2008-3076, 4 p.  Available Online

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