National Water-Quality Assessment (NAWQA) Program
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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
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
Robinson, Jr., Gilpin R., Ayotte, Joseph D., Montgomery, Denise L., and DeSimone, Leslie A., 2002, Lithogeochemical character of near-surface bedrock in the New England Coastal Basins: U.S. Geological Survey Open-File Report 02-007, no pagination. Available Online
Ging, Patricia B., and Otero, Cassi L., 2003, Comparison of temperature, specific conductance, pH, and dissolved oxygen at selected basic fixed sites in South-Central Texas, 1996-98: U.S. Geological Survey Open-File Report 03-087, 18 p. Available Online
Klasner, Frederick L., and Mikami, Clinton D., 2003, Land use on the island of Oahu, Hawaii, 1998: U.S. Geological Survey Water-Resources Investigations Report 02-4301, 20 p. Available Online
Ourso, R.T., and Frenzel, S.A., 2003, Identification of linear and threshold responses in streams along a gradient of urbanization in Anchorage, Alaska: Hydrobiologia, vol. 501, p. 117-131. doi: 10.1023/A:1026211808745 Available Online
Price, C.V., Nakagaki, N., Hitt, K.J., and Clawges, R.M., 2003, Mining GIRAS: Improving on a national treasure of land-use data: Proceedings: ESRI 2003 International User Conference, San Diego, CA, July 7-11, 2003, on-line conference proceedings. Available Online
Robinson, Jr., G.R., and Kapo, K.E., 2003, Generalized lithology and lithogeochemical character of near-surface bedrock in the New England region: U.S. Geological Survey Open-File Report 03-225, on-line only. Available Online
Thiros, Susan A., 2003, Hydrogeology of Shallow Basin-Fill Deposits in Areas of Salt Lake Valley, Salt Lake County, Utah: U.S. Geological Survey Water-Resources Investigations Report 03-4029, 24 p. Available Online
Coupe, R.H., and Capel, P.D., 2005, Bogue Phalia watershed in Mississippi selected for a national water-quality study: U.S. Geological Survey Fact Sheet 2005-3050, 2 p. Available Online
Green, C.T., Stonestrom, D.A., Bekins, B.A., Akstin, K.C., and Schulz, M.S., 2005, Percolation and transport in a sandy soil under a natural hydraulic gradient: Water Resources Research, vol. 41, W10414, 17 p. doi: 10.1029/2005WR004061 Available Online
Kalkhoff, Steven, and Capel, P.D., 2005, South Fork Iowa River watershed selected for a national water-quality study: U.S. Geological Survey Fact Sheet 2005-3064, 2 p. Available Online
Manning, A.H., Solomon, D.K., and Thiros, S. A., 2005, 3 H/3 He age data in assessing the susceptibility of wells to contamination: Ground Water, vol. 43, no. 3, p. 353-367. doi: 10.1111/j.1745-6584.2005.0028.x Available Online
Scanlon, B.R., Reedy, R.C., Stonestrom, D.A., Prudic, D.E., and Dennehy, K.F., 2005, Impact of land use and land cover change on groundwater recharge and quality in the southwestern US: Global Change Biology, vol. 11, p. 1577-1593. doi: 10.1111/j.1365-2486.2005.01026.x Available Online
Fredrick, B.S., Linard, J.I., and Carpenter, J.L., 2006, Environmental setting of Maple Creek Watershed, Nebraska: U.S. Geological Survey Scientific Investigations Report SIR 2006-5037, 22 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
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
Payne, K.L., Johnson, H.M., and Black, R.W., 2007, Environmental setting of the Granger Drain and DR2 basins, Washington, 2003-04: U.S. Geological Survey Scientific Investigations Report 2007-5102, 26 p. Available Online
Zamora, Celia, 2008, Estimating Water Fluxes Across the Sediment-Water Interface in the Lower Merced River,California: U.S. Geological Survey Scientific Investigations Report 2007-5216, 47 p. Available Online
Hinkle, S.R., Shapiro, S.D., Plummer, L.N., Busenberg, Eurybiades, Widman, P.K., Casile, G.C., and Wayland, J.E., 2010, Estimates of tracer-based piston-flow ages of groundwater from selected sites--National Water-Quality Assessment Program, 1992-2005: U.S. Geological Survey Scientific Investigations Report 2010-5229, 90 p. Available Online
Lindsey, B.D., Katz, B.G., Berndt, M.P., Ardis, A.F., and Skach, K.A., 2010, Relations between sinkhole density and anthropogenic contaminants in selected carbonate aquifers in the eastern United States: Environmental Earth Sciences, vol. 60, no. 5, p. 1073-1090. doi: 10.1007/s12665-009-0252-9 Available Online
Price, C.V., Nakagaki, Naomi, and Hitt, K.J., 2010, National Water-Quality Assessment (NAWQA) Area-Characterization Toolbox, Release 1.0: U.S. Geological Survey Open-File Report 2010-1268, 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
McMahon, P.B., Plummer, L.N., Bohlke, J.K., Shapiro, S.D., Hinkle, S.R., 2011, A comparison of recharge rates in aquifers of the United States based on groundwater-age data: Hydrogeology Journal, 22 p., online in advance of print. doi: 10.1007/s10040-011-0722-5 Available Online
Starn, Jeffrey, Bagtzoglou, Amvrossios C., 2011, Programs for calibration-based Monte Carlo simulation of recharge areas: Ground Water, online in advance of print, October 2011, 5 p. 10.1111/j.1745-6584.2011.00868.x Available Online