National Water-Quality Assessment (NAWQA) Project
More Information about Methods
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Zelt, Ronald B., Brown, Jesslyn, F., and Kelly, Michael S., 1995, Validation of national land-cover characteristics data for regional water-quality assessment: Geocarto International, vol. 10, no. 4, p. 69-80.
Zelt, R.B., 1991, Applications of GIS to the management and analysis of hydrologic information: GIS World, vol. 4, no. 5, August 1991.
Zaugg, Steven D., Sandstrom, Mark W., Smith, Steven G., and Fehlberg, Kevin M., 1995, Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory; determination of pesticides in water by C-18 solid-phase extraction and capillary-column gas chromatography/mass spectrometry with selected-ion monitoring: U.S. Geological Survey Open-File Report 95-181, 49 p. Available Online
Zaugg, S.D.,Sandstrom, M.W. Smith, S.G., and Fehlberg, K.M., 1995, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory--Determination of Pesticides in Water by C-18 Solid-Phase Extraction and Capillary-Column Gas Chromatography/Mass Spectrometry with Selected-Ion Monitoring: U.S. Geological Survey Open-File Report 95-181, 49 p. Available Online
Yuan, Lester L., Pollard, Amina I., and Carlisle, Daren M., 2009, Using propensity scores to estimate the effects of insecticides on stream invertebrates from observational data: Environmental Toxicology and Chemistry, vol. 28, no. 7, p. 1518-1527. doi: 10.1897/08-551.1 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
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
Wolff, R.H., 2005, Feasibility using benthic invertebrates as indicators of stream quality in Hawaii: U.S. Geological Survey Scientific Investigations Report 2005-5079, 78 p. Available Online
Wilson, John T., Baker, Nancy T., Moran, Michael J., Crawford, Charles G., Nowell, Lisa H., Toccalino, Patricia L., and Wilber, William G., 2008, Methods and Sources of Data Used to Develop Selected Water-Quality Indicators for Streams and Ground Water for the 2007 Edition of The State of the Nation's Ecosystems Report with Comparisons to the 2002 Edition: U.S. Geological Survey Open-File Report 2008-1110, 61 p. Available Online
Whitman, Matthew Scott, 2002, A protocol for assessing the impacts of urbanization on Coho salmon with application to Chester Creek, Anchorage, Alaska: University of Alaska Fairbanks, Master of Science Thesis, 79 p.
Whitman, Matthew S., Moran, Edward H., and Ourso, Robert T., 2003, Photographic techniques for characterizing streambed particle sizes: Transactions of the American Fisheries Society, vol. 132, no. 3, p. 605-610. doi: 10.1577/1548-8659(2003)132<0605:PTFCSP>2.0.CO;2 Available Online
Wetherbee, G.A., and Martin, RoseAnn, 2017, Updated operational protocols for the U.S. Geological Survey Precipitation Chemistry Quality Assurance Project in support of the National Atmospheric Deposition Program: U.S. Geological Survey Open-File Report 2016-1213, 18 p. Available Online
Werner, S.L., Burkhardt, M.R., and DeRusseau, S.N., 1996, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory--Determination of Pesticides in Water by Carbopak-B Solid-Phase Extraction and High-Performance Liquid Chromatography: U.S. Geological Survey Open-File Report 96-216, 42 p. Available Online
Warner, K.L., and Arnold, T.L., 2005, Framework for regional synthesis of water-quality data for the glacial aquifer system in the United States: U.S. Geological Survey Scientific Investigations Report 2005-5223, 6 p. Available Online
Walsh, S.J., and Meador, M.R., 1998, Guidelines for quality assurance and quality control of fish taxonomic data collected as part of the National Water-Quality Assessment Program: U.S. Geological Survey Water-Resources Investigations Report 98-4239, 33 p. Available Online
Waite, Ian R., 2013, Development and application of an agricultural intensity index to invertebrate and algal metrics from streams at two scales: Journal of the American Water Resources Association, vol. 49, no. 2, p. 431-448. doi: 10.1111/jawr.12032 Available Online
Valder, Joshua F., Delzer, Gregory C., Price, Curtis V., and Sandstrom, Mark W., 2008, Study design and percent recoveries of anthropogenic organic compounds with and without the addition of ascorbic acid to preserve water samples containing free chlorine, 2004-06: U.S. Geological Survey Open-File Report 2008-1226, 86 p. Available Online
Toccalino, Patricia, Nowell, Lisa, Wilber, William, Zogorski, John, Donohue, Joyce, Eiden, Catherine, Krietzman, Sandra, and Post, Gloria, 2003, Development of health-based screening levels for use in state- or local- scale water-quality assessments: U.S. Geological Survey Water-Resources Investigations Report 03-4054, 22 p. Available Online
Toccalino, Patricia L., Norman, Julia E., Phillips, Robyn H., Kauffman, Leon J., Stackelberg, Paul E., Nowell, Lisa H., Krietzman, Sandra J., and Post, Gloria B., 2004, Application of health-based screening levels to ground-water quality data in a state-scale pilot effort: U.S. Geological Survey Scientific Investigations Report 2004-5174, 64 p. Available Online
Toccalino, P.L., Zogorski, J.S., and Norman, J.E., 2005, Health-based screening levels and their application to water-quality data: U.S. Geological Survey Fact Sheet 2005-3059, 2 p. Available Online
Toccalino, P.L., and Norman, J.E., 2006, Health-Based Screening Levels to Evaluate U.S. Geological Survey Ground-Water Quality Data: Risk Analysis, vol. 26, no. 5, p. 1339-1348. doi: 10.1111/j.1539-6924.2006.00805.x Available Online
Toccalino, P.L., 2007, Development and application of health-based screening levels for use in water-quality assessments: U.S. Geological Survey Scientific Investigations Report 2007-5106, 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
Thiros, S.A., Bender, D.A., Mueller, D.K., Rose, D.L., Olsen, L.D., Martin, J.D., Bernard, B., and Zogorski J.S., 2011, Design and evaluation of a field study on the contamination of selected volatile organic compounds and wastewater-indicator compounds in blanks and groundwater samples: U.S. Geological Survey Scientific Investigations Report 2011-5027, 85 p. Available Online
Thelin, G.P., and Stone, W.W., 2010, Method for estimating annual atrazine use for counties in the conterminous United States, 1992-2007: U.S. Geological Survey Scientific Investigations Report 2010-5034, 129 p. Available Online
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