Source: https://toxics.usgs.gov/hypoxia/usgs_publications.html
Timestamp: 2019-04-26 03:56:26+00:00

Document:
Pellerin, B.A., Bergamaschi, B.A., Gilliom, R.J., Crawford, C.G., Saraceno, J., Frederick, C.P., Downing, B.D., and Murphy, J.C., 2014, Mississippi River nitrate loads from high frequency sensor measurements and regression-based load estimation: Environmental Science and Technology, v. 48, no. 21, p. 12612-12619, doi:10.1021/es504029c.
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Mueller, D.K., and Spahr, N.E., 2005, Water-quality, streamflow, and ancillary data for nutrients in streams and rivers across the Nation, 1992-2001: U.S. Geological Survey Data Series 152.
Mueller, David K. and Titus, Cindy J., 2005, Quality of nutrient data from streams and ground water sampled during water years 1992-2001: U.S. Geological Survey Scientific Investigations Report 2005.5106, 27 p.
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Puckett, L.J., 2004, Hydrogeologic controls on the transport and fate of nitrate in ground water beneath riparian buffer zones—Results from thirteen studies across the United States: Water Science and Technology, v. 49, no. 3, p. 47-53.
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Swarzenski, P.W., and Campbell, P.L., 2004, Tracking contaminants down the Mississippi: Geotimes, v. 49, no. 5 (May 2004), p. 40-41.
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Sheibley, R.W., Duff, J.H., Jackman, A.P., and Triska, F.J., 2003, Inorganic nitrogen transformations in the bed of the Shingobee River, Minnesota—Integrating hydrologic and biological processes using sediment perfusion cores: Limnology and Oceanography, v. 48, no. 3, p. 1129-1140.
Sheibley, R.W., Jackman, A.P., Duff, J.H., and Triska, F.J., 2003, Numerical modeling of coupled nitrification-denitrification in sediment perfusion cores from the hyporheic zone of the Shingobee River, Minnesota: Advances in Water Resources, v. 26, no. 9, p. 977-987, doi: 10.1016/S0309-1708(03)00088-5.
Smith, R.A., Alexander, R.B., and Schwarz, G.E., 2003, Natural background concentrations of nutrients in streams and rivers of the conterminous United States: Environmental Science and Technology, v. 37, no. 14, p. 3039-3047.
U.S. Geological Survey, 2003, 100+ years of land change for southeast coastal Louisiana: U.S. Geological Survey NWRC 2003-02-0373 (map, one sheet).
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, v. 57, no. 58, p. 295- 339.
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Chang, C.C.Y., Kendall, C., Silva, S.R., Battaglin, W.A., and Campbell, D.H., 2002, Nitrate stable isotopes—Tools for determining nitrate sources among different land uses in the Mississippi River Basin: Canadian Journal of Fisheries and Aquatic Sciences, v. 59, no. 12, p. 1874-1885.
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Nolan, B.T., and Hitt, K.J., 2002, Nutrients in shallow ground waters of beneath relatively undeveloped areas in the conterminous United States: U.S. Geological Survey Water-Resources Investigations Report 02-4289, 17 p.
Nolan, B.T., Hitt, K.J., and Ruddy, B.C., 2002, Probability of nitrate contamination of recently recharged groundwaters in the conterminous United States: Environmental Science & Technology, v. 36, no. 10, p. 2138-2145.
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Litke, D.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.
Lucas, L.V., Koseff, J.R., Cloern, J.E., Monismith, S.G., and Thompson, J.K., 1999, Processes governing phytoplankton blooms in estuaries—Part I, The local production-loss balance: Marine Ecology Progress Series, v. 187, p. 1-16.
Lucas, L.V., Koseff, J.R., Monismith, S.G., Cloern, J.E., and Thompson, J.K., 1999, Processes governing phytoplankton blooms in estuaries—Part II, The role of horizontal transport: Marine Ecology Progress Series, v. 187, p. 17-30.
Nolan, B.T., 1999, Nitrate behavior in ground waters of the southeastern United States: Journal of Environmental Quality, v. 28, no. 5, Sep.-Oct. 1999, p. 1518-1527.
Puckett, L.J., Cowdery, T.K., Lorenz, D.L., and Stoner, J.D., 1999, Estimation of nitrate contamination of an agro-ecosystem outwash aquifer using a nitrogen mass-balance budget: Journal of Environmental Quality, volume 28, no. 6, Nov.-Dec. 1999, p. 2015-2025.
Rizzo, W. M. and Boustany, R. G., 1999, Sediment-water material fluxes in benthic microalgal-dominated sediments from beds of submersed vegetation, in Rozas, L.P., Nyman, J.A., Proffitt, C.E., Rabalais, N.N., Reed, D.J., and Turner, R.E., eds., Impacts of light reduction and nutrient enrichment, 2-3-1998, 101-110.
Sorenson, S.K., Porter, S.D., Akers, K.K.B, Harris, M.A., Kalkhoff, S.J., Lee, K.E., Roberts, L.R., and Terrio, P.J., 1999, Water quality and habitat conditions in Upper Midwest streams relative to riparian vegetation and soil characteristics, August 1997—Study design, methods and data: U.S. Geological Survey Open-File Report 99-202, 53 p.
Wilkison, D.H., and Blevins, D.W., 1999, Observations on preferential flow and horizontal transport of nitrogen fertilizer in the unsaturated zone: Journal of Environmental Quality, v. 28, no. 5, p. 1568-1580.
Battaglin, W.A., and Goolsby, D.A., 1998, Regression models of herbicide concentrations in outflow from reservoirs in the midwestern USA, 1992-1993: Journal of the American Water Resources Association, v. 34, no. 6, p. 1369-90, AWRA Paper Number 97055.
Goolsby, D.A., Hooper, R.P., and Battaglin, W.A., 1998, Sources and transport of nitrogen in the Mississippi River Basin, in Proceedings "From the Corn Belt to the Gulf...Agriculture and Hypoxia in the Mississippi River Watershed," American Farm Bureau Federation Workshop, St Louis, Missouri, July 14-15, 1997: American Farm Bureau Federation, p. 59-64 (document has no page numbers).
Lucas, L.V., Cloern, J.E., Koseff, J.R., Monismith, S.G., and Thompson, J.K., 1998, Does the Sverdrup critical depth model explain bloom dynamics in estuaries?: Journal of Marine Research, v. 56, no. 2, p. 375-415.
McClain, M.E., Bilby, R.E., and Triska, F.J., 1998, Chapter 14 - Biogeochemical cycles of nitrogen, phosphorus, and sulfur—Natural distributions and response to disturbance, in Naiman, R.J., ed., The Ecology and Management of Rivers and Streams in the Pacific Northwest Ecoregion: New York, Springer-Verlag, p. 347-372.
Mueller, D.K., 1998, Quality of nutrient data from streams and ground water sampled during 1993-95—National Water-Quality Assessment Program: U.S. Geological Survey Open-File Report 98-276, 25 p.
Mueller, D.K., and Stoner, J.D., 1998, Identifying the potential for nitrate contamination of streams in agricultural areas of the United States in Proceedings of the National Water-Quality Monitoring Conference, July 7-9, 1998, Reno, Nev., p. III-163 to III-173.
Nolan, B.T., 1998, Modeling approaches for assessing risk of non-point contamination of ground water: U.S. Geological Survey Open-File Report 98-531, 22 p.
Nolan, B.T., Ruddy, B.C., Hitt, K.J., and Helsel, D.R., 1998, A national look at nitrate contamination of groundwaters: Water Conditioning and Purification, v. 39, no. 12, p. 76-79.
Nolan, B.T., Ruddy, B.C., Hitt, K.J., and Helsel, D.R., 1998, Nitrate in ground waters of the United States, in Proceedings of the National Water-Quality Monitoring Conference, July 7-9, 1998, Reno, Nev.
Scribner, E.A., Goolsby, D.A., Thurman, E.M., and Battaglin, W.A., 1998, A reconnaissance for selected herbicides and nutrients in streams of nine Midwestern States, 1994-95: U.S. Geological Survey Open-File Report 98-181, 44 p.
Soballe, D. M., 1998, Successful water quality monitoring—The right combination of intent, measurements, interpretation, and a cooperating ecosystem: Lake and Reservoir Management, v. 14, no. 1, p. 10–20.
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, v. 34, no. 9, p. 2401-2405.
Antweiler, R.C., and Taylor, H.E., 1997, Spatial distribution of nutrients in the Mississippi River system (1991-1992)—Proceedings, in Gulf of Mexico Hypoxia Conference, Kenner, Louisiana: U.S. Environmental Protection Agency, p. 133-143.
Battaglin, W.A., Kendall, C., Goolsby, D.A., and Boyer, L.L., 1997, Plan of study to determine if the isotopic ratios d15N and d18O can reveal the sources of nitrate discharged by the Mississippi River into the Gulf of Mexico: U.S. Geological Survey Open-File Report 97-230, 18 p.
Goolsby, D.A., Battaglin, W.A., and Hooper, R.P., 1997, Sources and transport of nitrogen in the Mississippi River Basin, in From the Corn Belt to the Gulf—Agriculture and Hypoxia in the Mississippi River Watershed, Proceedings, St. Louis, Mo., July 14-15, 1997: American Farm Bureau Federation, p. 6.
Hooper, R.P., Goolsby, D.A., Rickert, D.A., and McKenzie, S.W., 1997, NASQAN, A program to monitor the water quality of the nation's large rivers: U.S. Geological Survey Fact Sheet FS-055-97, 6 p.
Kolpin, D.W., Hallberg, G., Sneck-Fahrer, D.A., and Libra, R., 1997, Agricultural chemicals in Iowa's ground water, 1982-95—What are the trends: U.S. Geological Survey Fact Sheet FS-116-97, 4 p.
Mueller, D.K., Ruddy, B.C., and Battaglin, W.A., 1997, Logistic model of nitrate in streams of the upper-midwestern United States: Journal of Environmental Quality, v. 26, no. 5, p. 1223-1230.
Nolan, B.T., Ruddy, B.C., Hitt, K.J., and Helsel, D.R., 1997, Risk of nitrate in ground waters of the United States—A national perspective: Environmental Science and Technology, v. 31, n. 8, p. 2229-2236.
Rostad, C.E., Leenheer, J.A., and Daniel, S.R., 1997, Organic carbon and nitrogen content associated with colloids and suspended particulates from the Mississippi River and some of its tributaries: Environmental Science and Technology, v. 31, no. 11, p. 3218-3225, doi: 10.1021/es970196b.
Smith, R.A., Schwarz, G.E., and Alexander, R.B., 1997, Regional interpretation of water quality monitoring data: Water Resources Research, v. 33, no. 12, p. 2781-2798, 97WR02171.
Triska, F.J., and Duff, J.H., 1997, Sediment associated nitrification and denitrification potentials at the interface between a bankside ground water seep and the channel of the Shingobee River, in Winter, T.C., ed., Interdisciplinary research initiative—Hydrological and biogeochemical research in the Shingobee River headwaters area, north-central Minnesota: U.S. Geological Survey Water-Resources Investigations Report 96-4215, p. 155-160.
Alexander, R.B., Ludtke, A.S., Fitzgeral, K.K., and Schertz, T.L., 1996, Data from selected U.S. Geological Survey National Stream Water-Quality Monitoring Networks (WQN) on CD-ROM: Open-File Report 96-337, 85 p.
Antweiler, R.C., Goolsby, D.A., and Taylor, H.E., 1996, Nutrients in the Mississippi River, 1987-92, in Meade, R.H., ed., Contaminants in the Mississippi River: U.S. Geological Survey Circular 1133, p. 73-85.
Blevins, D.W., Wilkison, D.H., Kelly, B.P., and Silva, S.R., 1996, Movement of nitrate fertilizer to glacial till and runoff from a claypan soil: Journal of Environmental Quality, v. 25, no. 3, p. 582-593.
Blevins, D.W., Wilkison, D.H., Silva, S.R., and Kelly, B.P., 1996, Use of 15N to trace movement of nitrogen fertilizer at a field plot, in Morganwalp, D.W., and Aronson, D.A., eds., U.S. Geological Survey Toxic Substances Hydrology Program—Proceedings of the technical meeting, Colorado Springs, Colorado, September 20-24, 1993: U.S. Geological Survey Water-Resources Investigations Report 94-4015, v. 1, p. 401-409.
Brinton, T.I., Antweiler, R.C., and Taylor, H.E., 1996, Method for the determination of dissolved chloride, nitrate and sulfate in natural water using ion chromatography: U.S. Geological Survey Open-File Report 95-426-A, 16 p.
Campbell, D.H., Cravotta, C.A., Ging, P., Lind, C.J., Lawrence, G.B., Murdoch, P.S., Silva, S., and Wilkison, D., 1996, Atmospheric deposition and nitrogen cycling in soils—Use of isotopes for determining sources (Working Groups 3 and 4 summary report), in Puckett, L.J., and Triska, F.J., eds., U.S. Geological Survey Nitrogen Cycling Workshop, Denver, Colorado, October 30 - November 2, 1995: U.S. Geological Survey Open-File Report 96-477, p. 72-77.
Druliner, A.D., Goolsby, D.A., and Meyer, M., 1996, Temporal distributions of herbicide and nitrite-nitrate concentrations and loads in the West Fork of the Big Blue River, Nebraska, 1990 and 1991-92, in Morganwalp, D.W., and Aronson, D.A., eds., U.S. Geological Survey Toxic Substances Hydrology Program—Proceedings of the technical meeting, Colorado Springs, Colorado, September 20-24, 1993: U.S. Geological Survey Water-Resources Investigations Report 94-4015, v. 1, p. 479-485.
Druliner, A.D., and McGrath, T.S., 1996, Predicting nitrate-nitrogen and atrazine contamination in the High Plains aquifer in Nebraska, in Morganwalp, D.W., and Aronson, D.A., eds., U.S. Geological Survey Toxic Substances Hydrology Program—Proceedings of the technical meeting, Colorado Springs, Colorado, September 20-24, 1993: U.S. Geological Survey Water-Resources Investigations Report 94-4015, v. 1, p. 515-524.
Graffy, E.A., Helsel, D.R., and Mueller, D.K., 1996, Nutrients in the Nation's waters—Identifying problems and progress—A national water-quality assessment of nutrients: U.S. Geological Survey Fact Sheet FS-218-96, 6 p.
Johnson, G.P., and Coupe, R.H., 1996, Transport and concentrations of selected herbicides and nitrate in the Sangamon River, Illinois, April 1991 - March 1992, in Morganwalp, D.W., and Aronson, D.A., eds., U.S. Geological Survey Toxic Substances Hydrology Program—Proceedings of the technical meeting, Colorado Springs, Colorado, September 20-24, 1993: U.S. Geological Survey Water-Resources Investigations Report 94-4015, v. 1, p. 471-478.
Lamb, J.A., Tomer, M.D., Anderson, J.L., and Dowdy, R.H., 1996, Nitrogen uptake and soil water variability across a sand plain landscape, in Morganwalp, D.W., and Aronson, D.A., eds., U.S. Geological Survey Toxic Substances Hydrology Program—Proceedings of the technical meeting, Colorado Springs, Colorado, September 20-24, 1993: U.S. Geological Survey Water-Resources Investigations Report 94-4015, v. 1, p. 575-579.
Lubinski, K. 1996, Management in transition on the Upper Mississippi River, in Proceedings of the Rivertech96, First International Conference on new/emerging concepts for rivers: International Water Resources Association, Urbana, Illinois, v. 1, p. 143–145.
McMahon, P.B., and Böhlke, J.K., 1996, Denitrification and mixing in a stream-aquifer system—Effects on nitrate loading to surface water: Journal of Hydrology, v. 186, no. 1-4, p. 105-128, doi: 10.1016/S0022-1694(96)03037-5.
Mueller, D.K., Ruddy, B.C., and Battaglin, W.A., 1996, Relation of nitrate concentrations in surface water to land use in the Upper-Midwestern United States, 1989-90, in Morganwalp, D.W., and Aronson, D.A., eds., U.S. Geological Survey Toxic Substances Hydrology Program—Proceedings of the technical meeting, Colorado Springs, Colorado, September 20-24, 1993: U.S. Geological Survey Water-Resources Investigations Report 94-4015, v. 1, p. 441-448.
Mueller, D.K., and Helsel, D.R., 1996, Nutrients in the Nation's waters—Too much of a good thing?: U.S. Geological Survey Circular 1136, 24 p.
Nolan, B.T., and Ruddy, B.C., 1996, Nitrate in ground waters of the United States—Assessing the risk: U.S. Geological Survey Fact Sheet FS-092-96, 4 p.
Pringle, C.M., and Triska, F.J., 1996, Chapter 29 - Effects of nutrient enrichment on periphyton, in Hayer, F.R., and Lamberti, G.A., eds., Methods in Stream Ecology: San Diego, Academic Press, p. 607-624.
Puckett, L.J., and Triska, F.J., eds., 1996, U.S. Geological Survey nitrogen cycling workshop, Denver, Colo., October 30 - November 2, 1995: U.S. Geological Survey Open-File Report 96-477, 88 p.
Puckett, L.J., and Triska, F.J., 1996, USGS nitrogen cycling workshop: U.S. Geological Survey Open-File Report 96-477, 88 p.
Scribner, E.A., Goolsby, D.A., Thurman, E.M., Meyer, M.T., and Battaglin, W.A., 1996, Concentrations of selected herbicides, herbicide metabolites, and nutrients in outflow from selected midwestern reservoirs, April 1992 through September 1993: U.S. Geological Survey Open-File Report 96-393, 128 p.
Soenksen, P.J., Hatfield, J.L., and Schmitz, D.J., 1996, Chemical loads of nitrate, atrazine, and metolachlor in Walnut Creek watershed near Ames, Iowa, 1991-92, in Morganwalp, D.W., and Aronson, D.A., eds., U.S. Geological Survey Toxic Substances Hydrology Program—Proceedings of the technical meeting, Colorado Springs, Colorado, September 20-24, 1993: U.S. Geological Survey Water-Resources Investigations Report 94-4015, v. 1, p. 597-605.
Verstraeten, I.M., McGuire, V.L., and Battaglin, W.A., 1996, Use of 2D and 3D GIS in well selection and interpretation of nitrate data, central Nebraska, USA, in Kovar, K., and Nachtnebel, H., eds., Application of Geographic Information Systems in Hydrology and Water Resources Management—Proceedings of HydroGIS'96 meeting, Vienna, Austria, April 1996: International Association of Hydrological Sciences Publication No. 235, p. 585-591.
Wanty, R.B., Tuttle, M.L., Landon, M.K., Delin, G.N., and Böhlke, J.K., 1996, Geochemistry of nitrogen in a farmed watershed near Princeton, Minnesota, in Morganwalp, D.W., and Aronson, D.A., eds., U.S. Geological Survey Toxic Substances Hydrology Program—Proceedings of the technical meeting, Colorado Springs, Colorado, September 20-24, 1993: U.S. Geological Survey Water-Resources Investigations Report 94-4015, v. 1, p. 591-596.
Yen, S., Liu, S., and Kolpin, D.W., 1996, Analysis of nitrate in near-surface aquifers in the midcontinental United States—An application of the inverse hyperbolic sine Tobit model: Water Resources Research, v. 32, no. 10, p. 3003-3011, 96WR02102, doi:10.1029/96WR02102.
Antweiler, R.C., Patton, C.J., and Taylor, H.E., 1995, Nutrients, in Moody, J.A., ed., Chemical data for water samples collected during four upriver cruises on the Mississippi River between New Orleans, Louisiana, and Minneapolis, Minnesota, May 1990-April 1992: U.S. Geological Survey Open-File Report 94-523, p. 89-92.
Battaglin, W.A., and Goolsby, D.A., 1995, Spatial data in geographic information sustem format on agricultural chemical use, land use, and cropping practices in the United States: U.S. Geological Survey Water-Resources Investigations Report 94-4176, 87 p.
Bratkovich, A., Dinnel, S.P., and Goolsby, D.A., 1995, Variability and prediction of freshwater and nitrate fluxes for the Louisiana-Texas shelf— Mississippi and Atchafalaya source functions: Estuaries, v. 17, no. 4, p. 766-778.
Brinton, T.I., Garbarino, J.R., Peart, D.B., Taylor, H.E., and Antweiler, R.C., 1995, Concentration and transport data for dissolved inorganic constituents in water collected during seven cruises on the Mississippi River and some of its tributaries, July 1987 - June 1990: U.S. Geological Survey Open-File Report 94-524, 102 p.
Caffrey, J.M., and Miller, L.G., 1995, A comparison of two nitrification inhibitors used to measure nitrification rates in estuarine sediments: FEMS Microbiology Ecology, v. 17, p. 213-219, doi: 10.1016/0168-6496(95)00026-7.
Coupe, R.H., Goolsby, D.A., Iverson, J.L., Zaugg, S.D., and Markovchick, D.J., 1995, Pesticide, nutrient, streamflow and physical property data for the Mississippi River and major tributaries, April 1991-September 1992: U.S. Geological Survey Open-File Report 93-657, 116 p.
Garbarino, J.R., Antweiler, R.C., Brinton, T.I., Roth, D.A., and Taylor, H.E., 1995, Concentration and transport data for selected dissolved inorganic constituents and dissolved organic carbon in water collected from the Mississippi River and some of its tributaries, July 1991 - May 1992: U.S. Geological Survey Open-File Report 95-149, 149 p.
Lubinski, K. S., 1995, Preface, Bridging the gap between theory and practice on the Upper Mississippi River: Regulated Rivers Research & Management, v. 11, p. 137–138.
Meade, R.H., ed., 1995, Contaminants in the Mississippi River, 1987-92: U.S. Geological Survey Circular 1133, 140 p.
McMahon, P.B., Tindall, J.A., Collins, J.A., Lull, K.J., and Nuttle, J.R., 1995, Hydrologic and geochemical effects on oxygen uptake in bottom sediments of an effluent-dominated river: Water Resources Research, v. 31, p. 2561-2569.
Mueller, D.K., Hamilton, P.A., Helsel, D.R., Hitt, K.J., and Ruddy, B.C., 1995, Nutrients in ground water and surface water of the United States—Analysis of data through 1992: U.S. Geological Survey Water-Resources Investigations Report 95-4031, 74 p.
Puckett, L.J, 1995, Identifying the major sources of nutrient water pollution: Environmental Science and Technology, v. 29, n. 9, p. 408-414A.
Tate, C.M., Broshears, R.E., and McKnight, D.M., 1995, Phosphate dynamics in an acidic mountain stream—Interactions involving algal uptake, sorption by iron oxide, and photoreduction: Limnology and Oceanography, v. 40, no. 5, p. 938-946.
Tindall, J.A., Petrusak, R.L., and McMahon, P.B., 1995, Nitrate transport and transformation processes in unsaturated porous media: Journal of Hydrology, v. 169, no. 1-4, p. 51-94.
Triska, F.J., Kennedy, V.C., Avanzino, R.J., and Stanley, K.C., 1995, Long-term effects of clearcutting and short-term impacts of storms on inorganic nitrogen uptake and regeneration in a small stream at summer base flow, in Nolan, K.M., Kelsey, H.M., and Marron, D.C., eds., Geomorphic processes and aquatic habitat in the Redwood Creek Basin, northwestern California: U.S. Geological Survey Professional Paper 1454, p. V1-V13.
Wlosinski, J. H., and Rogala, J. T., 1995, Pool 25—Effects of water level and levee management alternatives on present habitats, in Proceedings of the 51st annual meeting of the Upper Mississippi River Conservation Committee, Rock Island, Illinois.
Bratkovich, A., Dinnel, S.P., and Goolsby, D.A., 1994, Variability and prediction of freshwater and nitrate fluxes for the Louisiana-Texas shelf—Mississippi and Atchafalaya River source functions: Estuaries, v. 17, no. 4, p. 766-78.
Goolsby, D.A., 1994, Flux of herbicides and nitrate from the Mississippi River to the Gulf of Mexico during the 1993 flood, in Dowgiallo, M.J., ed., Coastal oceanographic effects of summer 1993 Mississippi River flooding—Special NOAA report: U.S. Department of Commerce, National Oceanic and Atmospheric Administration, p. 32-35.
Goolsby, D.A., Battaglin, W.A., and Thurman, E.M., 1994, Occurrence and transport of herbicides and nitrate in the Mississippi River during the 1993 flood—Proceedings of American Water Resources Association meeting, in, Nashville, Tenn., April 17-20, 1994: p. 473-477.
Kolpin, D.W., Burkart, M.R., and Thurman, E.M., 1994, Herbicides and nitrate in near-surface aquifers of the Mid-Continent United States: U.S. Geological Survey Water-Supply Paper 2413, 34 p.
Puckett, L.J., 1994, Nonpoint and point sources of nitrogen in major watersheds of the United States: U.S. Geological Survey Water-Resources Investigations Report 94-4001, 6 p.
Scribner, E.A., Goolsby, D.A., Thurman, E.M., Meyer, M.T., and Pomes, M.L., 1994, Concentrations of selected herbicides, two triazine metabolites, and nutrients in storm runoff from nine stream basins in the midwestern United States, 1990-92: U.S. Geological Survey Open-File Report 94-396, 144 p.
Taylor, H.E., Antweiler, R.C., Brinton, T.I., Roth, D.A., and Moody, J.A., 1994, Major ions, nutrients and trace elements in the Mississippi River near Thebes, Illinois, July through September, 1993: U.S. Geological Survey Circular 1120-D, 21 p.
Triska, F.J., Jackman, A.P., Duff, J.H., and Avanzino, R.J., 1994, Ammonium sorption to channel and riparian sediments—A transient storage pool for dissolved inorganic nitrogen: Biogeochemistry, v. 26, p. 67-83.
Wanty, R.B., Tuttle, M.L., Böhlke, J.K., and Briggs, P.H., 1994, Chemical analyses of ground and surface water from Battle Brook drainage basin, near Princeton, Minnesota: U.S. Geological Survey Open-File Report 94-129, 26 p.
Wilber, W.G., and Davis, J.V., 1994, Assessing the quality of the Nation's water—Point versus nonpoint sources of phosphorus in rivers: U.S. Geological Survey Yearbook, Fiscal Year 1993, p. 48-49.
Antweiler, R.C., Patton, C.J., and Taylor, H.E., 1993, Automated, colorimetric methods for determination of nitrate plus nitrite, ammonium and orthophosphate ions in nautral water samples: U.S. Geological Survey Open-File Report 93-638, 40 p.
Avanzino, R.J., and Kennedy, V.C., 1993, Long-term frozen storage of streamwater samples for dissolved orthophosphate, nitrate plus nitrate, and ammonia analysis: Water Resources Research, v. 29, no. 10, p. 3357-3362.
Böhlke, J.-K., Gwinn, C.J., and Coplen, T.B., 1993, New reference materials for nitrogen-isotope-ratio measurements: Geostandards Newsletter, v. 17, p. 159-164.
Burkart, M.R., and Kolpin, D.W., 1993, Regional assessment of factors related to herbicides and nitrate in near-surface aquifers of the midcontinent, in Agricultural research to protect water quality—Proceedings of the Conference, Minneapolis, Minn., February 21-24, 1993: Soil and Water Conservation Society, p. 390-392.
James, W. F., and Barko, J. W., 1993, Analysis of summer phosphorus fluxes within the pelagic zone of Eau Galle Reservoir, Wisconsin: Lake and Reservoir Management, v. 8, p. 61–71.
Kelly, B.P., and Blevins, D.W., 1993, Hydrologic budget and nitrogen distribution for an agricultural study plot in claypan soil and glacial till near Centralia, Mo.—May 1991 to May 1992, in Proceedings from 3rd Annual Missouri Water Quality Conference, Columbia, Missouri, Feb. 4, 1993: Columbia, Missouri, University of Missouri, p. 100-105.
Kelly, B.P., and Blevins, D.W., 1993, Hydrologic budget and nitrogen distribution for an agricultural test plot in claypan soil and glacial till near Centralia, Missouri—May 1991 to May 1992, in Agricultural Research to Protect Water Quality—Proceedings of the Conference, Minneapolis, Minn., February 21-24, 1993: Soil and Water Conservation Society, p. 545-547.
Kelly, B.P., and Blevins, D.W., 1993, Hydrology and nitrogen distribution in claypan soil and glacial till near Centralia, Missouri—May 1991 to May 1992, in Agricultural Research to Protect Water Quality, Minneapolis, Minnesota, 1993: Soil and Water Conservation Society, p. 545-546.
Kuwabara, J.S., and Baker, J.E., 1993, Trace contaminants and nutrients in estuaries—The importance of process interdependence: Estuaries, v. 16, no. 3A, p. 383-384.
Lubinski, K. S., and Gutreuter, S., 1993, Ecological information and habitat rehabilitation on the upper Mississippi River, Hesse, L. W., Stalnaker, C. B., Benson, N. G., and Zuboy, J.R., eds., Proceedings of the symposium on restoration planning for rivers of the Mississippi River ecosystem: Washington D.C., U.S. Department of the Interior, p. 87-100.
Lucey, K.J., and Goolsby, D.A., 1993, Effects of climatic variations over 11 years on nitrate-nitrogen concentrations in the Raccoon River, Iowa: Journal of Environmental Quality, v. 22, p. 38-46.
Mueller, D.K., Ruddy, B.C., and Battaglin, W.A., 1993, Relation of nitrate concentrations in surface water to land use in the upper-Midwestern United States, 1989-90, in Goolsby, D.A., Boyer, L.L., and Mallard, G.E., eds., Selected papers on agricultural chemicals in water resources of the Midcontinental United States: U.S. Geological Survey Open-File Report 93-418, p. 41-50.
Scribner, E.A., Thurman, E.M., Goolsby, D.A., Meyer, M.T., Mills, M.S., and Pomes, M.L., 1993, Reconnaissance data for selected herbicides, two atrazine metabolites, and nitrate in surface water of the Midwestern United States, 1989-90: U.S. Geological Survey Open-File Report 93-457, 77 p.
Smith, R.A., Alexander, R.B., and Lanfear, K.J., 1993, Stream water quality in the conterminous United States—Status and trends of selected indicators during the 1980's, in Paulson, R.W., Chase, E.B., Williams, J.S., and Moody, D.W., eds., National Water Summary 1990-91—Hydrologic events and stream water quality: U.S. Geological Survey Water-Supply Paper 2400, p. 111-140.
Sparks, R. E. ,1993, Large river-floodplain ecosystems—Value and need for ecological management: Bulletin of the Ecological Society of America, v. 74, no. 2, p. 442.
Springer, A., and Bair, S., 1993, Transport of atrazine, alachlor, and nitrate relative to the tracer bromide at the Ohio Management Systems Evaluation Area, in Agricultural Research to Protect Water Quality—Proceedings of the Conference, Minneapolis, Minn., February 21-24, 1993: Soil and Water Conservation Society, p. 102-104.
Triska, F.J., Duff, J.H., and Avanzino, R.J., 1993, Patterns of hydrological exchange and nutrient transformation in the hyporheic zone of a gravel bottom stream—Examining terrestrial aquatic linkages: Freshwater Biology, v. 29, p. 259-274.
Triska, F.J., Duff, J.H., and Avanzino, R.J., 1993, The role of water exchange between a stream channel and its hyporheic zone in nitrogen cycling at the terrestrial-aquatic interface: Hydrobiologia, v. 251, p. 167-184.
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