National Water-Quality Assessment (NAWQA) Program
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Bright, P.R., Buxton, H.T., Balistrieri, L.S., Barber, L.B., Chapelle, F.H., Cross, P.C., Krabbenhoft, D.P., Plumlee, G.S., Sleeman, J.M., Tillitt, D.E., Toccalino, P.L., and Winton, J.R., 2012, USGS Environmental health science strategy--Providing environmental health science for a changing world--Public review release: U.S. Geological Survey Open-File Report 2012-1069, 37 p. Available Online
Alexander, R.B., Bohlke, J.K., Boyer, E.W., David, M.B., Harvey, J.W., Mulholland, P.J., Seitzinger, S.P., Tobias, C.R., Tonitto, C., Wollheim, W.M., 2009, Dynamic modeling of nitrogen losses in river networks unravels the coupled effects of hydrological and biogeochemical processes : Biogeochemistry (2009) 93:91-116, p. 91-116. doi: 10.1007/s10533-008-9274-8 Available Online
Alexander, R.B., Smith, R.A., Focazio, M.J., and Horn, M.A., 1999, Source-Area Characteristics of Large Public Surface-Water Supplies in the Conterminous United States: An Information Resource for Source-Water Assessment: U.S. Geological Survey Fact Sheet FS-160-99, no pagination. Available Online
Alexander, R.B., Smith, R.A., Schwarz, G.S., Boyer, E.W., Nolan, J.V., and Brakebill, J.W., 2008, Differences in phosphorus and nitrogen delivery to the Gulf of Mexico from the Mississippi River Basin: Environmental Science and Technology, vol. 42, no. 3, p. 822-830. doi: 10.1021/es0716103 Available Online
Alexander, Richard B., Boyer, E.W., Smith, R.A., Schwarz, G.E., and Moore, R.B., 2007, The role of headwater streams in downstream water quality: Journal of the American Water Resources Association, vol. 43, no. 1, p. 41-59. doi: 10.1111/j.1752-1688.2007.00005.x Available Online
Alexander, Richard B., Johnes, Penny J., Boyer, Elizabeth W., and Smith, Richard A., 2002, A comparison of models for estimating the riverine export of nitrogen from large watersheds: Biogeochemistry, vol. 57, no. 58, p. 295-339. doi: 10.1023/A:1015752801818 Available Online
Alexander, Richard B., Slack, James R., Fitzgerald, A.S., and Schertz, T.L., 1997, Data from selected U.S. Geological Survey national stream water quality monitoring networks: Water Resources Research, vol. 34, no. 9, p. 2401-2405. 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., Focazio, Michael J., and Horn, Marillee A., 1999, Source-area characteristics of large public surface- water supplies in the conterminous United States: An information resource for source-water assessment: U.S. Geological Survey Open-File Report 99-248, CD-ROM. 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.
Alley, W.M., and Cohen, Philip, 1991, A scientifically based nationwide assessment of groundwater quality in the United States: Environmental Geology and Water Science, vol. 17, no. 1, p. 17-22. doi: 10.1007/BF01716071 Available Online
Alley, W.M., Wilber, W.G., and Leahy, P.P., 1990, Hydrologic basin approach to national water-quality assessment in the United States: in Hooghart, J.C., Posthumus, C.W.S., and Warmerdam. P.M.M., eds., Hydrologic Research Basins and the Environments: Proceedings and Information No.44, The Hague, p. 285-294.
Anning, David W., 2011, Modeled sources, transport, and accumulation of dissolved solids in water resources of the Southwestern United States: Journal of the American Water Resources Association, online 22Aug2011 in advance of print, 23 p. doi: 10.1111/j.1752-1688.2011.00579.x Available Online
Asher, W., Bender, D.A., Zogorski, J.S., and Bartholomay, R.C., 2006, StreamVOC-A deterministic source-apportionment model to estimate volatile organic compound concentrations in rivers and streams: U.S. Geological Survey Scientific Investigations Report 2006-5110, 167 p. Available Online
Asher, W.E., Luo, Wentai, Campo, K.W., Bender, D.A., Robinson, K.W, Zogorski, J.S., and Pankow, J.F., 2007, Application of a source apportionment model in consideration of volatile organic compounds in an urban stream: Environmental Toxicology and Chemistry, vol. 26, no. 8, p. 1606-1613. doi: 10.1897/06-557 Available Online
Ator, Scott W., and Denver, Judith M., 2012, Estimating contributions of nitrate and herbicides from groundwater to headwater streams, Northern Atlantic Coastal Plain, United States: Journal of the American Water Resources Association, online 20Sept2012 in advance of print, 16 p. doi: 10.1111 /j.1752-1688.2012.00672.x Available Online
Aumen, Nicholas G., Gurtz, Martin E., Barbour, Michael T., and Moerke, Ashley, 2010, Bridges: Evolution of basic and applied linkages in benthic science: The North American Benthological Society, vol. 29, no. 1, p. 359-371. doi: 10.1899/08-031.1 Available Online
Ayotte, J.D., Flanagan, S.M., and Morrow, W.S., 2007, Occurrence of uranium and 222radon in glacial and bedrock aquifers in the northern United States, 1993-2003: U.S. Geological Survey Scientific Investigations Report 2007-5037, 84 p. Available Online
Ayotte, J.D., Gronberg, J.M., and Apodaca, L.E., 2011, Trace elements and radon in groundwater across the United States, 1992-2003: U.S. Geological Survey Scientific Investigations Report 2011-5059, 115 p. Available Online
Ayotte, Joseph, D., Szabo, Zoltan, Focazio, Michael J., and Eberts, Sandra M., 2011, Effects of human-induced alteration of groundwater flow on concentrations of naturally-occurring trace elements at water-supply wells: Applied Geochemistry, 16 p., in press. doi:10.1016/j.apgeochem.2011.01.033 Available Online
Baehr, Arthur L., Charles, Emmanuel G., and Baker, Ronald J., 2000, Field evidence for degradation of methyl tert-butyl either (MTBE) at low concentrations in the unsaturated zone: EPA/API Workshop on MTBE Biodegradation, Cincinnati, Ohio, February 1-3, 2000.
Baker, N.T., 2011, Tillage practices in the conterminous United States, 1989-2004 - -Datasets Aggregated by Watershed: U.S. Geological Survey Data Series 573, 13 p., online only. Available Online
Baker, N.T., and Capel, P.D., 2011, Environmental factors that influence the location of crop agriculture in the conterminous United States: U.S. Geological Survey Scientific Investigations Report 2011-5108, 72 p. Available Online
Baker, N.T., Wilson, J.T., and Moran, M.J., 2008, Methods and sources of data used to develop selected water-quality indicators for streams and ground water for EPA's 2007 Report on the Environment: U.S. Geological Survey Open-File Report 2008-1096, 23 p. Available Online
Barbash, J.E. , 2007, The geochemistry of pesticides. In: Environmental Geochemistry (ed. B. S. Lollar), Volume 9 of Treatise on Geochemistry (eds. H.D.Holland and K.K. Turekian): Elsevier--Pergamon, Oxford, UK, on-line edition, 43 p. Available Online
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