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Robertson, D.M., and Saad, D.A., 2001, Nutrient inputs to the Laurentian Great Lakes by source and watershed estimated using SPARROW watershed models: Journal of the American Water Resources Association, online 22Aug2011 in advance of print, 23 p.  doi: 10.1111/j.1752-1688.2011.00574.x Available Online

Robertson, D.M., and Saad, D.A., 2013, SPARROW Models Used to Understand Nutrient Sources in the Mississippi/Atchafalaya River Basin: Journal of Environmental Quality, vol. 42, no. 5, p. 1422-1440.  doi: 10.2134/jeq2013.02.0066 Available Online

Robertson, D.M., and Saad, D.A., 2013, Reply to Discussion - "Nutrient Inputs to the Laurentian Great Lakes by Source and Watershed Estimated Using SPARROW Watershed Models" by R. Peter Richards, Ibrahim Alameddine, J. David Allan, David B. Baker, Nathan S. Bosch, Remegio Confesor, Joseph V. DePinto, David M. Dolan, Jeffrey M. Reutter, and Donald Scavia: Journal of the American Water Resources Association (JAWRA), v. 49, no. 3, p. 725-734.  DOI: 10.1111/jawr.12060 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

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. 

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

Roth, J.L, and Capel, P.D., 2012, Changes in water budgets and sediment yields from a hypothetical agricultural field as a function of landscape and management characteristics-A unit field modeling approach: U.S. Geological Survey Scientific Investigations Report 2012-5203, 42 p.  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

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

Ryberg, K.R., and Vecchia, A.V., 2013, seawaveQ-An R package providing a model and utilities for analyzing trends in chemical concentrations in streams with a seasonal wave (seawave) and adjustment for streamflow (Q) and other ancillary variables: U.S. Geological Survey Open-File Report 2013-1255, 13 p.  Available Online

Saad, D.A., Schwarz, G.E., Robertson, D.M., and Booth, N.L., 2011, A multi-agency nutrient dataset used to estimate loads, improve monitoring design, and calibrate regional nutrient SPARROW models: Journal of the American Water Resources Association, online 22Aug2011 in advance of print, 17 p.  doi: 10.1111/j.1752-1688.2011.00575.x 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

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

Saleh, D.K., Lorenz, D.L. and Domagalski, J.L., 2011, Comparison of Two Parametric Methods to Estimate Pesticide Mass Loads in California's Central Valley: JAWRA Journal of the American Water Resources Association, 47, p. 254-264.  doi: 10.1111/j.1752-1688.2010.00506.x Available Online

Sauer, T.J., Alexander, R.B., Brahana, J.V., and Smith, R.A., 2001, The importance and role of watersheds in the transport of nitrogen: in Follett, R.F. and Hatfield, J.L., eds., Chapter 7 Nitrogen in the Environment: Elsevier, p. 147-181.  Available Online

Schaefer, D.H., Green,J.M., and Rosen, M.R., 2007, Hydrogeologic Settings and Ground-Water Flow Simulations of the Eagle Valley and Spanish Springs Valley Regional Study Areas, Nevada, Section 3 in Paschke, Suzanne S., ed., 2007, Hydrogeologic settings and ground-water flow simulations for regional studies of the transport of anthropogenic and natural contaminants to public-supply wells--studies begun in 2001: U.S. Geological Survey Professional Paper 1737-A, p. 3-1 to 3-31.  Available Online

Schelker, J., Burns, D.A., Weiler, M., and Laudon, H., 2011, Hydrological mobilization of mercury and dissolved organic carbon in a snow-dominated, forested watershed: Conceptualization and modeling : Journal of Geophysical Research, vol. 116, G01002, 17 p.  doi:10.1029/2010JG001330 Available Online

Schwarz, G.E., Alexander, R.B., Smith, R.A., and Preston, S.D., 2011, The regionalization of national-scale SPARROW models for stream nutrients: Journal of the American Water Resources Association, online 22Aug2011 in advance of print, 22 p.  doi: 10.1111/j.1752-1688.2011.00581.x Available Online

Scott, J.C., 1990, A statistical processor for analyzing simulations made using the modular finite-difference ground-water flow model: U.S. Geological Survey Water-Resources Investigations Report 89-4159, 218 p.  Available Online

Scott, J.C., Skach, K.A., and Toccalino, P.L., 2013, Software for analysis of chemical mixtures-composition, occurrence, distribution, and possible toxicity: U.S. Geological Survey Scientific Investigations Report 2013-5030, 27 p.  Available Online

Shanley, J.B., Moore, R., Smith, R.A., Miller, E.K., Simcox, A., Kamman, N., Nacci, D., Robinson, K., Johnston, J.M., Hughes, M.M., Johnston, C., Evers, D., Williams, K., Graham, J., King, S., 2012, MERGANSER: an empirical model to predict fish and loon mercury in New England lakes: Environmental Science and Technology, vol. 46(8), p. 4641-4648.  DOI: 10.1021/es300581p Available Online

Sheets, R.A., 2007, Hydrogeologic Setting and Ground-Water Flow Simulations of the Great Miami River Basin Regional Study Area, Ohio, Section 7 in Paschke, Suzanne S., ed., 2007, Hydrogeologic settings and ground-water flow simulations for regional studies of the transport of anthropogenic and natural contaminants to public-supply wells--studies begun in 2001: U.S. Geological Survey Professional Paper 1737-A, p. 7-1 to 7-21.  Available Online

Sheibley, R.W., Duff, J.H., and Tesoriero, A.J., 2014, Low Transient Storage and Uptake Efficiencies in Seven Agricultural Streams - Implications for Nutrient Demand: Journal of Environmental Quality,   doi:10.2134/jeq2014.01.0034 Available Online

Shih, Jhih-Shyang, Alexander, R.B., Smith, R.A., Boyer, E.W., Schwarz, G.E., and Chung, Susie, 2010, An initial SPARROW model of land use and in-stream controls on total organic carbon in streams of the conterminous United States: U.S. Geological Survey Open-File Report 2010-1276, 22 p.  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

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