National Water-Quality Assessment (NAWQA) Program
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MacCoy, Dorene, 2011, BioData: A National aquatic bioassessment database: U.S. Geological Survey Fact Sheet 2011-3112, 4 p. Available Online
Lyford, F.P., Carlson, Carl S., Brown, Craig J., and Starn, J. Jeffrey, 2007, Hydrogeologic setting and ground-water flow simulations of the Pomperaug River Basin Regional Study Area, Connecticut, Section 6 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. 6-1 to 6-24. Available Online
Lopes, Thomas J., and Furlong, Edward T., 2001, Occurrence and potential adverse effects of semivolatile organic compounds in stream bed sediments, United States, 1992-95: Environment Toxicology and Chemistry, vol. 20 no. 4, p. 727-737. Available Online
Lopes, Thomas J., and Dionne, Shannon G., 1998, A review of semivolatile and volatile organic compound in highway runoff and urban stormwater: U.S. Geological Survey Open-File Report 98-409, 67 p. Available Online
Lopes, Thomas J., and Bender, David A., 1998, Nonpoint sources of volatile organic compounds in urban areas--Relative importance of land surfaces and air: Environmental Pollution, vol. 101 (1998), p. 221-230. doi: 10.1016/S0269-7491(98)00048-7Â Available Online
Lopes, Thomas J. Furlong, Edward T., and Pritt, Jeffrey W., 1997, Occurrence and distribution of semivolatile organic compounds in stream bed sediments, United States, 1992-95: in Little, E.E., DeLonay, A.J., and Greenberg, B.M., eds., Environment Toxicology and Risk Assessment: Seventh Volume, ASTM STP 1333, 1998.
Liu, Shiping, Yen, Steven T., and Kolpin, Dana W., 1996, Pesticides in ground water: Do atrazine metabolites matter?: Journal of the American Water Resources Association, vol. 32, no. 4, August 1996, p. 845-853. doi: 10.1111/j.1752-1688.1996.tb03481.x Available Online
Litke, David W., 1999, Review of phosphorus control measures in the United States and their effects on water quality: U.S. Geological Survey Water-Resources Investigations Report 99-4007, 38 p. Available Online
Lindsey, B.D., and Rupert, M.G., 2012, Methods for evaluating temporal groundwater quality data and results of decadal-scale changes in chloride, dissolved solids, and nitrate concentrations in groundwater in the United States, 1988-2010: U.S. Geological Survey Scientific Investigations Report 2012-5049, 46 p. Available Online
Lindgren, Richard J., Houston, Natalie A., Musgrove, MaryLynn, Fahlquist, Laura S., and Kauffman, Leon J., 2011, Hydrogeologic setting and groundwater-flow simulations of the South-Central Texas regional study area, Texas, Section 3 in Eberts, Sandra M., ed., Hydrogeologic settings and groundwater-flow simulations for regional investigations of the transport of anthropogenic and natural contaminants to public-supply wells--Investigations begun in 2004: U.S. Geological Survey Professional Paper 1737-B, Section 3, p. 3-1 to 3-51. Available Online
Lindgren, R.J., Houston, N.A., Musgrove, M., Fahlquist, L.S., and Kauffman, L.J., 2011, Simulations of groundwater flow and particle-tracking analysis in the zone of contribution to a public-supply well in San Antonio, Texas: U.S. Geological Survey Scientific Investigations Report 2011-5149, 93 p. Available Online
Linard, J.I., Wolock, D.M., Webb, R.M.T., and Wieczorek, M.E., 2009, Identifying hydrologic processes in agricultural watersheds using precipitation-runoff models: U.S. Geological Survey Scientific Investigations Report 2009-5126, 22 p. Available Online
Lee, K.E., Lorenz, D.L., Petersen, J.C., and Greene, J.B., 2012, Seasonal patterns in nutrients, carbon, and algal responses in wadeable streams within three geographically distinct areas of the United States, 2007-08: U.S. Geological Survey Scientific Investigations Report 2012-5086, 55 p. Available Online
Leahy, P.P., Ryan, B.J., and Johnson, A. Ivan, 1993, An introduction to the U.S. Geological Survey's National Water-Quality Assessment Program: American Water Resources Association Water Resources Bulletin July/August 1993 vol. 29, no. 4, p. 529-532.
Leahy, P.P., and Wilber, W.G., 1991, The National Water-Quality Assessment (NAWQA) Program--A basis for water-resource policy development: Irrigation and drainage Proceedings 1991, Honolulu, HI, p. 711-717.
Leahy, P.P., and Wilber, W.G., 1991, National Water-Quality Assessment Program: U.S. Geological Survey Open-File Report 91-54, 2 p. Available Online
Leahy, P.P., 1992, Consistent data on water quality--It's long overdue: Geotimes December 1992, p 5.
Leahy, P.P., 1990, Implementation plan for the National Water-Quality Assessment Program: U.S. Geological Survey Open-File Report 90-174, 10 p. Available Online
Larson, Steven J., Gilliom, Robert J., and Capel, Paul D., 1999, Pesticides in streams of the United States--Initial results from the National water-quality Assessment Program: U.S. Geological Survey Water-Resources Investigations Report 98-4222, 92 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
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
Larson, S.J., Capel, P.D., and Majewski, M.S., 1997, Pesticides in surface waters--Current understanding of distribution and major influences: U.S. Geological Survey Fact Sheet FS-039-97, 4 p. Available Online
Larson, S.J., Capel, P.D., and Majewski, M.S, 1997, Pesticides in surface waters: Distribution, trends, and governing factors: Volume 3 of the series: Pesticides in the Hydrologic System: Ann Arbor Press, Chelsea, Michigan, 390 p. Available Online
Lapham, Wayne W., Neitzert, Kathleen M., Moran, Michael J., and Zogorski, John S., 1997, USGS complies data set for national assessment of VOCs in ground water: Ground Water Monitoring and Remediation, Fall 1997, p. 147-157.
Lapham, Wayne W., Moran, Michael J., and Zogorski, John S., 2000, Enhancements of nonpoint source monitoring of volatile organic compounds in ground water: Journal of the American Water Resources Association, vol. 36, no. 6, December 2000, p. 1321-1334. doi: 10.1111/j.1752-1688.2000.tb05729.x Available Online
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