National Water-Quality Assessment (NAWQA) Program
More Information about Modeling
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Caskey, B.J., Justus, B.G., and Zappia, Humbert, 2002, Occurrence of invertebrates at 38 stream sites in the Mississippi Embayment study unit, 1996-99: U.S. Geological Survey Open-File Report 02-190, CD-ROM. Available Online
McMahon, Gerald and Roessler, Chris, 2002, A regression-based approach to understand baseline total nitrogen loading for TMDL planning: Proceedings of Water Environment Federation National TMDL Science and Policy 2002 Specialty Conference, Phoenix, Arizona, November 13-16,2002, 27 p.
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
Nolan, Bernard T., Hitt, Kerie J., and Ruddy, Barbara C., 2002, Probability of nitrate contamination of recently recharged groundwaters in the conterminous United States: Environmental Science & Technology, vol. 36, no. 10, p. 2138-2145. doi: 10.1021/es0113854 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
Baehr, Arthur L., Charles, Emmanuel G., and Baker, Ronald J., 2001, Methyl tert- butyl either degradation in the unsaturated zone and the relation between MTBE in the atmosphere and shallow ground water: Water Resources Research, vol. 37, no. 2, p. 223-233. Available Online
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
Larson, Steven J., and Gilliom, Robert J., 2001, Regression models for estimating herbicide concentrations in U.S. streams from watershed characteristics: Journal of the American Water Resources Association, vol. 37, no. 5, p. 1349-1367. doi: 10.1111/j.1752-1688.2001.tb03644.x 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
Nolan, Bernard T., 2001, Relating nitrogen sources and aquifer susceptibility to nitrate in shallow ground waters of the United States: Ground Water, vol. 39, no. 2, p. 290-299. Available Online
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
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
Wong, Charles S., Capel, Paul D., and Nowell, Lisa H., 2001, National-scale, field-based evaluation of the biota--Sediment accumulation factor model: Environmental Science & Technology, vol. 35, no. 9, p. 1709-1715. doi: 10.1021/es0016452 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
Alexander, Richard B., Smith, Richard A., Schwarz, Gregory E., Preston, Stephen D., Brakebill, John W., Srinivasan, Raghavan, and Pacheco, Percy A., 2000, Atmospheric nitrogen flux from the watersheds of major estuaries of the United States: An application of the SPARROW watershed model: American Geophysical Union, p. 119-170.
Alpers, Charles N., Antweiler, Ronald C., Taylor, Howard E., Dileanis, Peter D., and Domagalski, Joseph L., eds., 2000, Metal transport in the Sacramento River, California, 1996-97: Volume 2: Interpretations of metal loads: U.S. Geological Survey Water-Resources Investigations Report 00-4002, 106 p. Available Online
Ator, Scott W., Denver, Judith M. and Pitchford, Ann M., 2000, Developing Landscape-Indicator Models for Pesticides and Nutrients in Streams of the Mid-Atlantic Coastal Plain : U.S. Geological Survey Fact Sheet FS-157-00, 4 p. Available Online
Black, Robert W., Haggland, Alan L., Voss, and Frank V., 2000, Predicting the probability of detecting organochlorines pesticides and polychlorinated biphenyls in stream systems on the basis of land use in the Pacific northwest, USA: Environmental Toxicology and Chemistry, vol. 19, no. 4, p. 1044-1054. doi: 10.1897/1551-5028(2000)019<1044:PTPODO>2.3.CO;2 Available Online
Brown, Larry R., and May, Jason T., 2000, Benthic macroinvertebrate assemblages and their relations with environmental variables in the Sacramento and San Joaquin River Drainages, California, 1993-1997: U.S. Geological Survey Water-Resources Investigations Report 00-4125, 25 p. Available Online
Brown, Larry R., and May, Jason T., 2000, Macroinvertebrate assemblages on woody debris and their relations with environmental variables in the lower Sacramento and San Joaquin River Drainages: Environmental Monitoring and Assessment, vol. 64, p. 311-329. doi: 10.1023/A:1006482800472 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.
Carpenter, Kurt D., and Waite, Ian R., 2000, Relations of habitat-specific algal assemblages to land use and water chemistry in the Willamette Basin, Oregon: Environmental Monitoring and Assessment, vol. 64, no. 1, p. 247-257. doi: 10.1023/A:1006460802772 Available Online
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
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