National Water-Quality Assessment (NAWQA) Project
More Information about Modeling
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Pankow, J.F., Asher, W.E., and Zogorski, J.S., 2006, Source apportionment modeling of volatile organic compounds in streams: Environmental Toxicology and Chemistry, vol. 25, no. 4, p. 921-932. Available Online
Squillace, P.J., and Moran, M.J., 2006, Factors associated with sources, transport, and fate of volatile organic compounds in aquifers of the United States and implications for ground-water management and assessments: U.S. Geological Survey Scientific Investigations Report 2005-5269, 40 p. Available Online
Stackelberg, P.E., Gilliom, R.J., Wolock, D.M., and Hitt, K.J., 2006, Development and application of a regression equation for estimating the occurrence of atrazine in shallow ground water beneath agricultural areas of the United States: U.S. Geological Survey, Scientific Investigations Report 2005-5287, 12 p. Available Online
Thoms, R.B., Johnson, R.L., and Healy, R.W., 2006, User's guide to the variably saturated flow (VSF) process for MODFLOW: U.S. Geological Survey Techniques and Methods, 6-A18, 58 p. Available Online
Vecchia, A.V., and Crawford, C.G., 2006, Simulation of daily pesticide concentrations from watershed characteristics and monthly climatic data: U.S. Geological Survey Scientific Investigations Report 2006-5181, 60 p. Available Online
Brown, L.R., Gray, R., Hughes, R, and Meador, M.R., editors, 2005, The effects of urbanization on aquatic ecosystems: American Fisheries Society, Symposium 47, Bethesda, Maryland, 423 p.
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
Green, C.T., Stonestrom, D.A., Bekins, B.A., Akstin, K.C., and Schulz, M.S., 2005, Percolation and transport in a sandy soil under a natural hydraulic gradient: Water Resources Research, vol. 41, W10414, 17 p. doi: 10.1029/2005WR004061 Available Online
Hitt, K.J., and Nolan, B.T., 2005, Nitrate in ground water--using a model to simulate the probability of nitrate contamination of shallow ground water in the conterminous United States: U.S. Geological Survey Scientific Investigations Map 2881, 2 sheets. Available Online
Meador, M.R., Coles, J.F., and Zappia, Humbert, 2005, Fish assemblage responses to urban intensity gradients in contrasting metropolitan areas: Birmingham, Alabama and Boston, Massachusetts: 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. 409-423. 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
Potapova, Marina, Coles, J. F., Giddings, E.M., and Zappia, Humbert, 2005, A comparison of the influences of urbanization on stream benthic algal assemblages in contrasting environmental settings: in Brown, L.R., Gray, R.H., Hughes, R.M., and Meador, M.R., eds., Effects of urbanization on stream ecosystems: American Fisheries Society, Symposium 47, Bethesda, Maryland, p. 333-359. Available Online
Puckett, L.J., and Hughes, W.B., 2005, Transport and Fate of Nitrate and Pesticides: Hydrogeology and Riparian Zone Processes: Journal of Environmental Quality, vol. 34, no. 6, p 2278-2292. doi: 10.2134/jeq2005.0109 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
Tate, C.M., Cuffney, T.F., McMahon, Gerald, Giddings, E.M.P., Coles, J.R., and Zappia, Humbert, 2005, Use of an urban intensity index to assess urban effects on streams in three contrasting environmental settings: 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. 291-315. Available Online
Coles, J.F., Cuffney, T.F., McMahon, G., and Beaulieu, K.M., 2004, The effects of urbanization on the biological, physical, and chemical characteristics of coastal New England streams: U.S. Geological Survey Professional Paper 1695, 47 p. Available Online
Larson, Steven J., Crawford, Charles G., and Gilliom, Robert J., 2004, Development and application of watershed regressions for pesticides (WARP) for estimating atrazine concentration distributions in streams: U.S. Geological Survey Water-Resources Investigations Report 03-4047, 68 p. Available Online
McMahon, P.B., Böhlke, 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
New England Interstate Water Pollution Control Commission (NEIWPCC), 2004, New England SPARROW water quality model: IWR (Interstate Water Report newsletter), vol. 1, no. 3, Summer 2004, p. 6-7.
Wolock, D.M., Winter, T.C., and McMahon, G., 2004, Delineation and evaluation of hydrologic-landscape regions in the United States using geographic information system tools and multivariate statistical analyses: Environmental Management, vol. 34 (Supplement 1), p. S71-S88. doi: 10.1007/s00267-003-5077-9 Available Online
Woods, Paul F., 2004, Role of limnological processes in fate and transport of nitrogen and phosphorus loads delivered into Coeur d'Alene Lake and Lake Pend Oreille, Idaho, and Flathead Lake, Montana: U.S. Geological Survey Professional Paper 1682, 44 p. Available Online
Bender, David A., Asher, William E., and Zogorski, John S., 2003, LakeVOC--A Deterministic Model to Estimate Volatile Organic Compound Concentrations in Reservoirs and Lakes: U.S. Geological Survey Open-File Report 03-212, 283 p. Available Online
Bender, David A., Asher, William E., and Zogorski, John S., 2003, LakeVOC--A computer model to estimate the concentration of volatile organic compounds in lakes and reservoirs: U.S. Geological Survey Fact Sheet 104-03, 6 p. 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.
McMahon, Gerald, Alexander, R.B., and Qian, S., 2003, Support of Total Maximum Daily Load programs using spatially referenced regression models: ASCE Journal of Water Resources Planning and Management, vol. 129, no. 4, p. 315-329. doi: 10.1061/(ASCE)0733-9496(2003)129:4(315) Available Online
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