National Water-Quality Assessment (NAWQA) Program
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Showing results 1251 to 1276 of 2000.
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Gurtz, Martin E., and Muir, Thomas A., 1994, Report on the interagency biological methods workshop: U.S. Geological Survey Open-File Report 94-490, 85 p. Available Online
Gurtz, M.E., 1993, Design of biological components of the National Water-Quality Assessment (NAWQA) Program, chapter 15: in Loeb, S.L., and Spacie, A., eds., Biological monitoring of aquatic systems: Boca Raton, Fla., Lewis Publishers, p. 323-354.
Gurdak, Jason, J., Spahr, Norman E., and Szmajter, Richard J., 2002, Traveltime characteristics of Gore Creek and Black Gore Creek, Upper Colorado River Basin, Colorado: U.S. Geological Survey Water-Resources Investigations Report 02-4037, 14 p. Available Online
Gurdak, Jason, J., Greve, Adrienne I., and Spahr, Norman E., 2002, Water-quality data analysis of the Upper Gunnison River Watershed, Colorado, 1989-99: U.S. Geological Survey Water-Resources Investigations Report 02-4001, 61 p. Available Online
Gurdak, Jason J., Walvoord, Michelle A., and McMahon, Peter B., 2008, Susceptibility to enhanced chemical migration from depression-focused preferential flow, High Plains aquifer: Vadose Zone Journal, vol. 7, no. 4, p. 1172-1184. doi: 10.2136/vzj2007.0145 Available Online
Gurdak, J.J., McMahon, P.B., Dennehy, K.F., and Qi, S.L., 2009, Water quality in the High Plains aquifer, Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming, 1999-2004: U.S. Geological Survey Circular 1337, 63 p. Available Online
Gurdak, J.J., McCray, J.E., Thyne, G.D., and Qi, S.L., 2007, Latin hypercube approach to estimate uncertainty in ground water vulnerability: Ground Water, vol. 45, p. 348-361. doi: 10.1111/j.1745-6584.2006.00298.x Available Online
Gurdak, J.J., Hanson, R.T., McMahon, P.B., Bruce, B.W., McCray, J.E.,Thyne, G.D., and Reedy, R.C., 2007, Climate variability controls on unsaturated-zone water and chemical movement, High Plains aquifer: Vadose Zone Journal, vol. 6, no. 3, p. 533-547. doi: 10.2136/vzj2006.0087 Available Online
Gurdak, J.J., and Qi, S.L., 2006, Vulnerability of Recently Recharged Ground Water in the High Plains Aquifer to Nitrate Contamination: USGS Scientific Investigations Report 2006-5050, 39 p. Available Online
Gruber, S.J., and Munn, M.D., 1998, Organophosphate and carbamate insecticides in agricultural waters and cholinesterase (ChE) inhibition in Common Carp (Cyprinus carpio): Archives of Environmental Contamination and Toxicology, vol. 35, p. 391-396. doi: 10.1007/s002449900393 Available Online
Gruber, S.J., and Munn, M.D., 1996, Organochlorine pesticides and PCBs in aquatic ecosystems of the Central Columbia Plateau: U.S. Geological Survey Fact Sheet 170-96, 4 p. Available Online
Gross, E.L., Lindsey, B.D., and Rupert, M.G., 2012, Quality of major ion and total dissolved solids data from groundwater sampled by the National Water-Quality Assessent Program, 1992-2010: U.S. Geological Survey Scientific Investigations Report 2011-5153, 26 p. Available Online
Groschen, George E., Harris, Mitchell A., King, Robin B., Terrio, Paul J., and Warner, Kelly L., 2001, Water quality in the Lower Illinois River Basin, Illinois, 1995-98: U.S. Geological Survey Circular 1209, 36 p. Available Online
Groschen, George E., Arnold, Terri L., Morrow, William S., and Warner, Kelly L., 2009, Occurrence and distribution of iron, manganese, and selected trace elements in ground water in the glacial aquifer system of the Northern United States: U.S. Geological Survey Scientific Investigations Report 2009-5006, 89 p. Available Online
Groschen, G.E., Arnold, T.L., Harris, M.A., Dupre, D.H., Fitzpatrick, F.A., Scudder, B.C., Morrow, Jr., W.S., Terrio, P.J., Watner, K.L., and Murphy, E.A., 2004, Water quality in the Upper Illinois River Basin, Illinois, Indiana, and Wisconsin, 1999-2001: U.S. Geological Survey Circular 1230, 32 p. Available Online
Gronberg, Jo Ann M., Kratzer, Charles R., Burow, Karen R., Domagalski, Joseph L., and Phillips, Steven P., 2004, Water-quality assessment of the San Joaquin-Tulare Basins--Entering a new decade: U.S. Geological Survey Fact Sheet 2004-3012, 6 p. Available Online
Gronberg, Jo Ann M., Dubrovsky, Neil.M., Kratzer, Charles R., Domagalski, Joseph L., Brown, Larry R., and Burow, Karen R., 1998, Environmental setting of the San Joaquin-Tulare Basins, California: U.S. Geological Survey Water-Resources Investigations Report 97-4205, 45 p. Available Online
Gronberg, J.M., and Kratzer, C.R., 2006, Environmental setting of the lower Merced River basin, California: U.S. Geological Survey Scientific Investigations Report 2006-5152, 37 p. Available Online
Greve, Adrienne I., Spahr, Norman E., Van Metre, Peter C., and Wilson, Jennifer T., 2001, Identification of water-quality trends using sediment cores from Dillon Reservoir, Summit County, Colorado: U.S. Geological Survey Water-Resources Investigations Report 01-4022, 33 p. Available Online
Gregory, M.B., and Frick, E.A., 2001, Indicator-bacteria concentrations in streams of the Chattahoochee River National Recreation Area, March 1999- April 2000: in Hatcher, K.J., ed., Proceedings of the 2001 Georgia Water Resources Conference, Athens, Ga., Carl Vinson Institute of Government, The University of Georgia, p. 510-513.
Gregory, M.B., and Frick, E.A., 2001, Summary of fecal-coliform bacteria concentrations in streams of the Chattahoochee River National Recreation Area, Metropolitan Atlanta, Georgia, May-October 1994 and 1995: in Hatcher, K.J., ed., Proceedings of the 2001 Georgia Water Resources Conference, Athens, Ga., Carl Vinson Institute of Government, The University of Georgia, p. 718-721.
Gregory, M.B., and Calhoun, D.L., 2007, Physical, Chemical, and Biological Responses of Streams to Increasing Watershed Urbanization in the Piedmont Ecoregion of Georgia and Alabama, 2003: U.S. Geological Survey Scientific Investigations Report 2006-5101-B, 104 p. Available Online
Gregory, M.B., 2005, Microhabitat preference by aquatic invertebrates influence bioassessment metrics in Piedmont streams of Georgia and Alabama: in Hatcher, K.J., editor, Proceedings of the 2005 Georgia Water Resources Conference, Athens, Georgia, 6 p. Available Online
Gregory, M. Brian, and Frick, Elizabeth A., 2000, Fecal-coliform bacteria concentrations in streams of the Chattahoochee River National Recreation Area, Metropolitan Atlanta, Georgia, May-October 1994 and 1995: U.S. Geological Survey Water-Resources Investigations Report 00-4139, 8 p. Available Online
Gregory, M. Brian and Bryant, Wade L., 2003, Effects of urbanization on stream ecosystems in the piedmont ecoregion of Georgia and Alabama--a study design: in Hatcher, K.J., ed., Proceedings of the 2003 Georgia Water Resources Conference, April 23-24, University of Georgia, Athens, Georgia, 5 p.
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