Models

Computer models for the simulation of contaminant transport and fate and their applications

Antweiler, R.C., and Taylor, H.E., 2008,

Evaluation of statistical treatments of left-censored environmental data using coincident uncensored data sets--I. Summary statistics: Environmental Science and Technology, doi:10.1021/es071301c (Advanced Web release).

Báez-Cazull, S.E., McGuire, J.T., Cozzarelli, I.M., and Voytek, M.A., 2008,

Determination of dominant biogeochemical processes in a contaminated aquifer-wetland system using multivariate statistical analysis: Journal of Environmental Quality, v. 37, no. 1, p. 30-46, doi:10.2134/jeq2007.0169.

Buchwalter, D.B., Cain, D.J., Clements, W.H., and Luoma, S.N., 2008,

Using biodynamic models to reconcile differences between laboratory toxicity tests and field biomonitoring with aquatic insects: Environmental Science and Technology, doi:10.1021/es703130e (Advanced Web release).

Walvoord, M.A., Andraski, B.J., Krabbenhoft, D.P., and Striegl, R.G., 2008,

Transport of elemental mercury in the unsaturated zone from a waste disposal site in an arid region: Applied Geochemistry, v. 23, no. 3, p. 572-583, doi:10.1016/j.apgeochem.2007.12.014.

Aulenbach, B.T., Buxton, H.T., Battaglin, W.A., and Coupe, R.H., 2007,

Streamflow and nutrient fluxes of the Mississippi-Atchafalaya River Basin and subbasins for the period of record through 2005: U.S. Geological Survey Open-File Report 2007-1080 (Available On Line Only).

Buchwalter, D.B., Cain, D.J., Clements, W.H., and Luoma, S.N., 2007,

Using biodynamic models to reconcile differences between laboratory toxicity tests and field biomonitoring with aquatic insects: Environmental Science and Technology, v. 41, no. 13, p. 4,821-4,828, doi:10.1021/es070464y.

Cloern, J.E., 2007,

Habitat connectivity and ecosystem productivity--Implications from a simple model: The American Naturalist, v. 169, no. 1, p. E21-E33, doi:10.1086/510258.

Gandhi, N., Bhavsar, S.P., Diamond, M.L., Kuwabara, J.S., Marvin-DiPasquale, M., and Krabbenhoft, D.P., 2007,

Development of a mercury speciation, fate and biotic uptake (BIOTRANSPEC) model--Application to Lahontan Reservoir (Nevada, USA): Environmental Toxicology and Chemistry, v. 26, no. 11, p. 2,260-2,273, doi:10.1897/06-468R.1.

Hill, M.C., and Tiedeman, C.R., 2007,

Effective groundwater model calibration--With analysis of data, sensitivities, predictions, and uncertainty: Hoboken, John Wiley and Sons, 455 p., ISBN:978-0-471-77636-9.

Kent, D.B., Wilkie, J.A., and Davis, J.A., 2007,

Modeling the movement of a pH perturbation and its impact on adsorbed zinc and phosphate in a wastewater-contaminated aquifer: Water Resources Research, v. 43, no. 7, W07440, doi:10.1029/2005WR004841.

Kimball, B.A., Walton-Day, K., and Runkel, R.L., 2007,

Quantification of metal loading by tracer injection and synoptic sampling, 1996-2000 (Chapter E9), in Church, S.E., von Guerard, P., and Finger, S.E., eds., Integrated Investigations of Environmental Effects of Historical Mining in the Animas River Watershed, San Juan County, Colorado: U.S. Geological Survey Professional Paper 1651, v. 1, p. 417-495.

Kuwabara, J.S., Topping, B.R., Woods, P.F., and Carter, J.L., 2007,

Free zinc ion and dissolved orthophosphate effects on phytoplankton from Coeur d'Alene Lake, Idaho: Environmental Science and Technology, v. 41, no. 8, p. 2811-2817, doi:10.1021/es062923l.

MacWilliams, M.L., and Cheng, R.T., 2007,

Three-dimensional hydrodynamic modeling of San Pablo Bay on an unstructured grid, in Proceedings of the 7th International Conference on HydroScience and Engineering, Philadelphia, September 10-13, 2006: p. 16, ISBN:0977447405.

Maxwell, R.M., Welty, C., and Harvey, R.W., 2007,

Revisiting the Cape Cod bacteria injection experiment using a stochastic modeling approach: Environmental Science and Technology, v. 41, no. 15, p. 5548-5558, doi:10.1021/es062693a.

Molins, S., and Mayer, K.U., 2007,

Coupling between geochemical reactions and multicomponent gas and solute transport in unsaturated media--A reactive transport modeling study: Water Resources Research, v. 45, no. 5, W05435, doi:10.1029/2006WR005206.

Nimmo, J.R., 2007,

Simple predictions of maximum transport rate in unsaturated soil and rock: Water Resources Research, v. 43, no. 5, W05426, doi:10.1029/2006WR005372.

Presser, T.S., and Luoma, S.N., 2007,

Forecasting selenium discharges to the San Francisco Bay-Delta Estuary--Ecological effects of a proposed San Luis Drain extension: Professional Paper 1646, 196 p.

Runkel, R.L., 2007,

Toward a transport-based analysis of nutrient spiraling and uptake in streams: Limnology and Oceanography--Methods, v. 5, p. 50-62.

Runkel, R.L., Kimball, B.A., Walton-Day, K., and Verplanck, P.L., 2007,

A simulation-based approach for estimating premining water quality--Red Mountain Creek, Colorado: Applied Geochemistry, v. 22, no. 9, p. 1899-1918, doi:10.1016/j.apgeochem.2007.03.054.

Stollenwerk, K.G., Breit, G.N., Welch, A.H., Yount, J.C., Whitney, J.W., Foster, A.L., Uddin, M.N., Majumder, R.K., and Ahmed, N., 2007,

Arsenic attenuation by oxidized aquifer sediments in Bangladesh: Science of the Total Environment, v. 379, no. 2-3, p. 133-150, doi:10.1016/j.scitotenv.2006.11.029 (Arsenic in the Environment, Biology and Chemistry--Arsenic in the Environment Special Issue, Bhattacharya, P., Welch, A.H., Stollenwerk, K.G., McLaughlin, M.J., Bundschuh, J., and Panaullah, G., eds.).

Tonkin, M.J., Tiedeman, C.R., Ely, D.M., and Hill, M.C., 2007,

OPR-PPR, a computer program for assessing data importance to model predictions using linear statistics: U.S. Geological Survey Techniques and Methods, book 6, sec. E, chap. 2, 115 p.

Walton-Day, K., Paschke, S.S., Runkel, R.L., and Kimball, B.A., 2007,

Using the OTIS solute-transport model to evaluate remediation scenarios in Cement Creek and the Upper Animas River (Chapter E24), in Church, S.E., von Guerard, P., and Finger, S.E., eds., Integrated Investigations of Environmental Effects of Historical Mining in the Animas River Watershed, San Juan County, Colorado: U.S. Geological Survey Professional Paper 1651, v. 2, p. 973-1028.

Widdowson, M.A., Mendez, E., and Chapelle, F.H., 2007,

Estimating cleanup times for groundwater contamination remediation strategies: Journal of the American Water Works Association, v. 99, no. 3, p. 40-42, 44, 46.

Yager, R.M., Kappel, W.M., and Plummer, L.N., 2007,

Halite Brine in the Onondaga Trough near Syracuse, New York--Characterization and Simulation of Variable-Density Flow: U.S. Geological Survey Scientific Investigations Report 2007-5058, 40 p.

Yager, R.M., Kappel, W.M., and Plummer, L.N., 2007,

Origin of halite brine in the Onondaga Trough near Syracuse, New York State, USA--Modeling geochemistry and variable-density flow: Hydrogeology Journal, doi:10.1007/s10040-007-0186-9 (Advanced Web release).

Amos, R.T., and Mayer, K.U., 2006,

Investigating ebullition in a sand column using dissolved gas analysis and reactive transport modeling: Environmental Science and Technology, v. 40, p. 5361-5367, doi:10.1021/es0602501.

Amos, R.T., and Mayer, K.U., 2006,

Investigating the role of gas bubble formation and entrapment in contaminated aquifers--Reactive transport modeling: Journal of Contaminant Hydrology, v. 87, p. 123-154, doi:10.1016/j.jconhyd.2006.04.008.

Böhlke, J.K., Smith, R.L., and Miller, D.N., 2006,

Ammonium transport and reaction in contaminated groundwater--Application of isotope tracers and isotope fractionation studies: Water Resources Research, v. 42, W05411, doi:10.1029/2005WR004349.

Curtis, G.P., Davis, J.A., and Naftz, D.L., 2006,

Simulation of reactive transport of uranium(VI) in groundwater with variable chemical conditions: Water Resources Research, v. 42, W04404, doi:10.1029/2005WR003979.

Grégoire, C., Joesten, P.K., and Lane, J.W., Jr., 2006,

Use of borehole radar reflection logging to monitor steam-enhanced remediation in fractured limestone--Results of numerical modelling and a field experiment: Journal of Applied Geophysics, v. 60, no. 1, p. 41-54, doi:10.1016/j.jappgeo.2005.12.006.

Harte, P.T., Konikow, L.F., and Hornberger, G.Z., 2006,

Simulation of solute transport across low-permeability barrier walls: Journal of Contaminant Hydrology, v. 85, no. 3-4, p. 247-270, doi:10.1016/j.jconhyd.2006.02.012.

Kimball, B.A., Nordstrom, D.K., Runkel, R.L., and Verplanck, P.L., 2006,

Questa baseline and pre-mining ground-water quality investigation. 23. Quantification of solute mass loading for Red River, New Mexico: U.S. Geological Survey Scientific Investigations Report 2006-5004.

Konikow, L.F., 2006,

From data gathering to ground-water modeling, in Sánchez-Vila, X., Cabrera, M.C., and Valverde, M., eds., Proceedings of the IAH Workshop From Data Gathering and Groundwater Modelling to Integrated Management, Alicante, Spain, October 4-8, 2005: Madrid, Instituto Geológico y Minero de España, p. 17-31.

Konikow, L.F., and Hornberger, G.Z., 2006,

Modeling effects of multinode wells on solute transport: Ground Water, v. 44, no. 5, p. 648-660, doi:10.1111/j.1745-6584.2006.00231.x.

Konikow, L.F., and Hornberger, G.Z., 2006,

Use of the Multi-Node Well (MNW) package when simulating solute transport with the MODFLOW ground-water transport process: U.S. Geological Survey Techniques and Methods 6-A15, 34 p.

Konikow, L.F., Reilly, T.E., Barlow, P.M., and Voss, C.I., 2006,

Groundwater modeling (chapter 23), in Delleur, J.W., ed., The Handbook of Groundwater Engineering (2nd ed.): Boca Raton, CRC Press, ISBN:9780849343162.

Kwicklis, E., Wolfsberg, A., Stauffer, P., Walvoord, M., and Sully, M., 2006,

Numerical evaluation of liquid and vapor fluxes at the Nevada Test Site Area 3 radioactive-waste management site using hydrologic data and natural environmental tracers: Los Alamos National Laboratory Report.

Lewis-Brown, J.C., Carleton, G.B., and Imbrigiotta, T.E., 2006,

Hydraulic and solute-transport properties and simulated advective transport of contaminated ground water in a fractured-rock aquifer at the Naval Air Warfare Center, West Trenton, New Jersey, 2003: U.S. Geological Survey Scientific Investigations Report 2005-5049, 32 p.

Miller, M.P., McKnight, D.M., Cory, R.M., Williams, M.W., and Runkel, R.L., 2006,

Hyporheic exchange and fulvic acid redox reactions in an alpine stream/wetland ecosystem, Colorado Front Range: Environmental Science and Technology, v. 40, no. 19, p. 5943-5949, doi:10.1021/es060635j.

Scholl, M.A., Cozzarelli, I.M., and Christenson, S.C., 2006,

Recharge processes drive sulfate reduction in an alluvial aquifer contaminated with landfill leachate: Journal of Contaminant Hydrology, v. 86, no. 3-4, p. 239-261, doi:10.1016/j.jconhyd.2006.03.005.

Solomon, D.K., Cook, P.G., and Plummer, L.N., 2006,

Models of groundwater ages and residence times (chapter 6), in IAEA, ed., Use of chlorofluorocarbons in hydrology--A guidebook: Vienna, International Atomic Energy Agency, p. 73-88.

Winston, R.B., 2006,

GoPhast--A graphical user interface for PHAST: U.S. Geological Survey Techniques and Methods 6-A20, 98 p.

Zhu, L., Liu, L., Lane, J.W., Jr., and Day-Lewis, F.D., 2006,

Numerical simulation of EM wave propagation using split-step alternating direction implicit FDTD method, in Proceedings of the Eleventh International Conference on Ground Penetrating Radar (CD-ROM), Columbus, Ohio, June 19-22, 2006.

Ball, J.W., Runkel, R.L., and Nordstrom, D.K., 2005,

Questa baseline and pre-mining ground-water quality investigation. 12. Geochemical and reactive-transport modeling based on tracer injection-synoptic sampling studies for the Red river, New Mexico, 2001-2002: U.S. Geological Survey Scientific Investigations Report 2005-5149, 78 p.

Bekins, B.A., Cozzarelli, I.M., and Curtis, G.P., 2005,

A simple method for calculating growth rates of petroleum hydrocarbon plumes: Ground Water, v. 0, no. 0, doi:10.1111/j.1745-6584.2005.00093.x.

Chiou, C.T., Schmedding, D.W., and Manes, M., 2005,

Improved prediction of octanol--water partition coefficients from liquid-solute water solubilities and molar volumes: Environmental Science and Technology, v. 39, no. 22, p. 8840-8846, doi:10.1021/es050729d.

Day-Lewis, F.D., Singha, K., and Binley, A., 2005,

Applying petrophysical models to radar travel time and electrical resistivity tomograms--Resolution-dependent limitations: Journal of Geophysical Research, v. 110, no. B08206, p. 17, B08206, doi:10.1029/2004JB003569.

Gooseff, M.N., Bencala, K.E., Scott, D.T., Runkel, R.L., and McKnight, D.M., 2005,

Sensitivity analysis of conservative and reactive stream transient storage models applied to field data from multiple-reach experiments: Advances in Water Resources, v. 28, no. 5, p. 479-492, doi:10.1016/j.advwatres.2004.11.012.

Grégoire, C., Lane, J.W.J., and Joesten, P.K., 2005,

Steam injection pilot study in a contaminated fractured limestone (Maine, USA)--Modeling and analysis of borehole radar reflection data, in Proceedings of the 3rd International Workshop on Advanced Ground Penetrating Radar, Delft, The Netherlands, May 2-4, 2005.

Hanson, R.T., and Dettinger, M.D., 2005,

Ground-water/surface-water responses to global climate simulations, Santa Clara-Calleguas basin, Ventura County, California, 1950-93: Journal of the American Water Resources Association, v. 41, no. 3, p. 517-536, doi:10.1111/j.1752-1688.2005.tb03752.x.

Heppner, C.S., and Nimmo, J.R., 2005,

A computer program for predicting recharge with a master recession curve: U.S. Geological Survey Scientific Investigations Report 2005-5172, 8 p.

Kipp, K.L., Hsieh, P.A., Hayba, D.O., and Ingebritsen, S.E., 2005,

HYDROTHERM--A simulator of two-phase ground-water flow and heat transport: International Ground Water Modeling Center Newsletter, v. 23, no. 3, p. 3.

Koczot, K.M., Jeton, A.E., McGurk, B., and Dettinger, M.D., 2005,

Precipitation-runoff processes in the Feather River Basin, northeastern California, with prospects for streamflow predictability, water years 1971-97: U.S. Geological Survey Scientific Investigations Report 2004-5202, 82 p.

Konikow, L.F., and Glynn, P.D., 2005,

Modeling ground-water flow and quality, in Selinus, O., ed., Essentials of Medical Geology: Amsterdam, Elsevier, p. 737-765, ISBN:978-0-12-636341-8.

Luoma, S.N., and Rainbow, P.S., 2005,

Why is metal bioaccumulation so variable? Biodynamics as a unifying concept: Environmental Science and Technology, v. 39, no. 7, p. 1921-1931, doi:10.1021/es048947e.

Mayers, C.J., Andraski, B.J., Cooper, C.A., Wheatcraft, S.W., Stonestrom, D.A., and Michel, R.L., 2005,

Modeling tritium transport through a deep unsaturated zone in an arid environment: Vadose Zone Journal, v. 4, p. 967-976, doi:10.2136/vzj2004.0179.

McMahon, P., Böhlke, J.K., Brown, C., Burow, K., Crandall, C., and Landon, M., 2005,

Use of isotopes, age-dating, and numerical simulation to evaluate source histories and transport of NO3- to public supply wells in principal aquifers of the United States, in Proceedings of the Sixth International Symposium on Applied Isotope Geochemistry, Prague, Czech Republic, September 11-16, 2005: p. 157-158 (CD-ROM).

Mehl, S.W., and Hill, M.C., 2005,

MODFLOW-2005, the U.S. Geological Survey modular ground-water model--Documentation of shared node local grid refinement (LGR) and the boundary flow and head (BFH) package: U.S. Geological Survey Techniques and Methods 6-A12, 68 p.

Morin, R.H., 2005,

Hydrologic properties of coal beds in the Powder River Basin, Montana--I. Geophysical log analysis: Journal of Hydrology, v. 308, p. 227-241, doi:10.1016/j.jhydrol.2004.11.006.

Niswonger, R.G., Prudic, D.E., Pohll, G., and Constantz, J., 2005,

Incorporating seepage losses into the unsteady streamflow equations for simulating intermittent flow along mountain front streams: Water Resources Research, v. 41, W06006, doi:10.1029/2004WR003677.

Nolan, B.T., Bayless, E.R., Green, C.T., Garb, S., Voss, F.D., Lampe, D.C., Barbash, J.E., Capel, P., and Bekins, B., 2005,

Evaluation of unsaturated-zone solute-transport models for studies of agricultural chemicals: U.S. Geological Survey Open-File Report 2005-1196, 21 p.

Nordstrom, D.K., 2005,

A river on the edge--Water quality in the Red River and the USGS background study, in Price, L.G., Bland, D., McLemore, V.T., and Barker, J.M., eds., Mining in New Mexico, Decision-Makers Conference 2005, Taos region, Socorro, New Mexico: New Mexico Bureau of Geology and Mineral Resources, p. 64-67.

Paschke, S.S., Kimball, B.A., and Runkel, R.L., 2005,

Quantification and simulation of metal loading to the Upper Animas River, Eureka to Silverton, San Juan County, Colorado, September 1997 and August 1998: U.S. Geological Survey Scientific Investigations Report 2005-5054, 73 p.

Scholl, M.A., Christenson, S.C., Cozzarelli, I.M., Ferree, D.M., and Jaeschke, J.B., 2005,

Recharge processes in an alluvial aquifer riparian zone, Norman Landfill, Norman Oklahoma, 1998-2000: U.S. Geological Survey Scientific Investigations Report 2004-5238, 54 p.

Verplanck, P.L., Nordstrom, D.K., and McCleskey, R.B., 2005,

Questa baseline and pre-mining ground-water quality investigation. 20. Water chemistry trends of the Red River, Taos County, New Mexico, with data from selected seeps, tributaries, and snow, 2000-2004: U.S. Geological Survey Scientific Investigations Report 2006-5028.

Versteeg, D.J., Alder, A.C., Cunningham, V.L., Kolpin, D.W., Murray-Smith, R., and Ternes, T., 2005,

Environmental exposure modeling and monitoring of human pharmaceutical concentrations in the environment, in Williams, R.T., ed., Human pharmaceuticals - assessing the impacts on aquatic ecosystems: SETAC Press, p. 71-110, ISBN:978-1-880611-82-1.

Walvoord, M.A., Striegl, R.G., Prudic, D.E., and Stonestrom, D.A., 2005,

CO₂ dynamics in the Amargosa Desert--Fluxes and isotopic speciation in a deep unsaturated zone: Water Resources Research, v. 41, no. 2, W02006, doi:10.1029/2004WR003599.

Weeks, E.P., 2005,

Hydrologic properties of coal beds in the Powder River Basin, Montana--II. Aquifer test analysis: Journal of Hydrology, v. 308, p. 242-257, doi:10.1016/j.jhydrol.2004.11.002.

Winfield, K.A., 2005,

Development of property-transfer models for estimating the hydraulic properties of deep sediments at the Idaho National Engineering and Environmental Laboratory, Idahy: U.S. Geological Survey Scientific Investigations Report 2005-5114, 59 p.

Yi, C., Monson, R.K., Zhai, Z., Anderson, D.E., Lamb, B., Allwine, G., Turnipseed, A.A., and Burns, S.P., 2005,

Modeling and measuring the nocturnal drainage flow in a high-elevation, subalpine forest with complex terrain: Journal of Geophysical Research, v. 110, D22303, doi:10.1029/2005JD006282.

Zinn, B.A., and Konikow, L.F., 2005,

MODFLOW data extractor program: U.S. Geological Survey Open-File Report 2005-1143, 7 p.

Ball, J.W., Runkel, R.L., and Nordstrom, D.K., 2004,

Evaluating remedial alternatives for the Alamosa River and Wightman Fork, near Summitville Mine, Colorado--Application of a reactive transport model to low- and high-flow simulations, in Zannetti, P., ed., Environmental Sciences and Environmental Computing: The EnviroComp Institute, v. II, p. 1-54.

Curtis, G.P., and Davis, J.A., 2004,

Simulation of U(VI) transport in groundwater with variable geochemical conditions, in Wanty, R.B., and Seal II, R.R., eds., Proceedings of the Eleventh International Symposium on Water-Rock Interaction, Saratoga Springs, New York, July 2004: Balkema, v. 2, p. 927-933.

Curtis, G.P., Fox, P., Kohler, M., and Davis, J.A., 2004,

Comparison of in situ uranium K _D values with a laboratory determined surface complexation model: Applied Geochemistry, v. 19, p. 1643-1653, doi:10.1016/j.apgeochem.2004.03.004.

Davis, J.A., Meece, D.E., Kohler, M., and Curtis, G.P., 2004,

Approaches to surface complexation modeling of uranium(VI) adsorption on aquifer sediments: Geochimica et Cosmochimica Acta, v. 68, p. 3621-3641, doi:10.1016/j.gca.2004.03.003.

Davis, J.A., Yabusaki, S.B., Steefel, C.I., Zachara, J.M., Curtis, G.P., Redden, G.P., Criscenti, L.J., and Honeyman, B.D., 2004,

Assessing conceptual models for subsurface reactive transport of inorganic contaminants: Eos, v. 85, no. 44, p. 449-455.

Dettinger, M.D., Cayan, D.R., Meyer, M.K., and Jeton, A.E., 2004,

Simulated hydrologic responses to climate variations and change in the Merced, Carson, and American River basins, Sierra Nevada, California, 1900-2099: Climate Change, v. 62, p. 283-317, 5147542, doi:10.1023/B:CLIM.0000013683.13346.4f.

Gooseff, M.N., McKnight, D.M., and Runkel, R.L., 2004,

Reach-scale cation exchange controls on major ion chemistry of an Antarctic glacial meltwater stream: Aquatic Geochemistry, v. 10, no. 3-4, p. 221-238, doi:10.1007/s10498-004-2260-4.

Hughes, J.D., and Sanford, W.E., 2004,

SUTRA-MS - A version of SUTRA modified to simulate heat and multiple-solute transport: U.S. Geological Survey Open-File Report 2004-1207, 141 p.

Kochiss, C.S., 2004,

Numerical and physical modeling of the effects of temperature change on ground-penetrating radar: Storrs, University of Connecticut, unpublished Master's thesis, 82 p.

Landkamer, L.L., Harvey, R.W., Metge, D.W., and Ryan, J.N., 2004,

Modeling microbial enhancement of Zn (II) and Pb (II) transport in columns packed with geologic media, in Wanty, R., and Seal, R., eds., Water Rock Interaction: Exton, Pennsylvania, A.A. Balkema, v. 2, p. 1139-1140.

Masterson, J.P., Walter, D.A., and LeBlanc, D.R., 2004,

Transient analysis of the source of water to wells--Cape Cod, Massachusetts: Ground Water, v. 42, no. 1, p. 126-134, doi:10.1111/j.1745-6584.2004.tb02458.x.

Mendez, E., Widdowson, M., Brauner, S., Chapelle, F., and Casey, C., 2004,

Natural attenuation software (NAS)--A computer program for estimating remediation times of contaminated groundwater, in Latini, G., Passerini, G., and Brebbia, C., eds., Development and Application of Computer Techniques to Environmental Studies X: WIT Press, p. 185-194, ISBN:1-85312-718-3.

Palandri, J.L., and Kharaka, Y.K., 2004,

A compilation of rate parameters of water-mineral interaction kinetics for application to geochemical modeling: U.S. Geological Survey Water-Resources Investigations Report 2004-1068, 64 p.

Parkhurst, D.L., Kipp, K.L., Engesgaard, P., and Charlton, S.R., 2004,

PHAST--A program for simulating ground-water flow, solute transport, and multicomponent geochemical reactions: U.S. Geological Survey Techniques and Methods, book 6, sec. A, chap. 8, 154 p.

Payne, T.E., Davis, J.A., Ochs, M., Olin, M., and Tweed, C.J., 2004,

Uranium adsorption on weathered schist--Intercomparison of modeling approaches: Radiochimica Acta, v. 92, p. 651-661.

Payne, T.e., Davis, J.A., Lumpkin, G.R., Chisari, R., and Waite, T.D., 2004,

Surface complexation model of uranyl sorption on Georgia kaolinite: Applied Clay Science, v. 26, p. 151-162, doi:10.1016/j.clay.2003.08.013.

Petkewich, M.D., Parkhurst, D.L., Conlon, K.J., Campbell, B.G., and Mirecki, J.E., 2004,

Hydrologic and geochemical evaluation of aquifer storage recovery in the Santee Limestone/Black Mingo Aquifer, Charleston, South Carolina, 1998-2002: U.S. Geological Survey Scientific Investigations Report 2004-5046, 92 p.

Plummer, L.N., Sanford, W.E., Bexfield, L.M., Anderholm, S.K., and Busenberg, E., 2004,

Using geochemical data and aquifer simulation to characterize recharge and groundwater flow in the Middle Rio Grande Basin, New Mexico, in Hogan, J.F., Phillips, F.M., and Scanlon, B.R., eds., Groundwater Recharge in a Desert Environment--The Southwestern United States: Washington, D.C., American Geophysical Union Water Science and Application Series, volume 9, p. 185-216.

Presser, T.S., and Luoma, S.N., 2004,

Linking selenium sources to ecosystems--San Francisco Bay-Delta model: U.S. Geological Survey Fact Sheet 2004-3091, 4 p.

Presser, T.S., Piper, D.Z., Bird, K.J., Skorupa, J.P., Hamilton, S.J., Detwiler, S.J., and Huebner, M.A., 2004,

The Phosphoria Formation--A model for forecasting global selenium sources to the environment, in Hein, J., ed., Life Cycle of the Phosphoria Formation--From Deposition to the Post-Mining Environment: Amsterdam, Elsevier, p. 299-319.

Prudic, D.E., Konikow, L.F., and Banta, E.R., 2004,

A new streamflow-routing (SFR1) package to simulate stream-aquifer interaction with MODFLOW-2000: U.S. Geological Survey Open-File Report 2004-1042.

Sanford, W.E., Plummer, L.N., McAda, D.P., Bexfield, L.M., and Anderholm, S.K., 2004,

Hydrochemical tracers in the middle Rio Grande Basin, USA: 2. Calibration of a ground-water flow model: Hydrogeology Journal, v. 12, no. 4, p. 389-407, doi:10.1007/s10040-004-0326-4.

Sanford, W.E., Plummer, L.N., McAda, D.P., Bexfield, L.M., and Anderholm, S.K., 2004,

Use of environmental tracers to estimate parameters for a predevelopment ground-water-flow model of the middle Rio Grande Basin, New Mexico: U.S. Geological Survey Water-Resources Investigations Report 03-4286, 102 p.

Schlekat, C.E., Purkerson, D.G., and Luoma, S.N., 2004,

Modeling selenium bioaccumulation through arthropod food webs in San Francisco Bay, California, USA: Environmental Toxicology and Chemistry, v. 23, no. 12, p. 3003-3010, doi:10.1897/03-4.1.

Simpson, J.J., Dettinger, M.D., Gerhke, F., McIntyre, T.J., and Hufford, G.I., 2004,

Hydrologic scales, cloud variability, remote sensing and models--Implications for forecasting snowmelt and streamflow: Weather and Forecasting, v. 19, p. 251-276, doi:10.1175/1520-0434(2004)019<0251:HSCVRS>2.0.CO;2.

Thorstenson, D.C., and Parkhurst, D.L., 2004,

Calculation of individual isotope equilibrium constants for geochemical reactions: Geochimica et Cosmochimica Acta, v. 68, no. 11, p. 2449-2465, doi:10.1016/j.gca.2003.11.027.

Walvoord, M.A., and Stonestrom, D.A., 2004,

Enhanced gas-phase transport in a deep unsaturated zone, Amargosa Desert (U.S.A.), in Kovar, K., Hrkal, Z., and Bruthans, J., eds., Proceedings of International Conference on Finite-element Models, MODFLOW, and More, Karlovy Vary, Czech Republic, September 12-16, 2004: IAHS, p. 227-230.

Wente, S.P., 2004,

A statistical model and national data set for partioning fish-tissue mercury concentration variation between spatiotemporal and sample characteristic effects: U.S. Geological Survey Scientific Investigations Report 2004-5199, 15 p.

Wood, W.W., Kraemer, T.F., and Shapiro, A., 2004,

Radon (222Rn) in ground water of fractured rocks--A diffusion/ion exchange model: Ground Water, v. 42, no. 4, p. 552-567, doi:10.1111/j.1745-6584.2004.tb02624.x.

Battaglin, W.A., Ulery, R.L., Winterstein, T., and Welborn, T., 2003,

Estimating the susceptibility of surface water in Texas to nonpoint-source contamination by use of logistic regression modeling: U.S. Geological Survey Water-Resources Investigations Report 03-4205, 24 p.

Brown, J.G., and Glynn, P.D., 2003,

Kinetic dissolution of carbonates and Mn oxides in acidic water--measurement of in situ field rates and reactive transport modeling: Applied Geochemistry, v. 18, no. 8, p. 1225-1239, doi:10.1016/S0883-2927(03)00010-6.

Chapelle, F.H., Widdowson, M.A., Brauner, J.S., Mendez, E., and Casey, C.C., 2003,

Methodology for estimating times of remediation associated with monitored natural attenuation: U.S. Geological Survey Water-Resources Investigations Report 03-4057, 51 p.

Curtis, G.P., 2003,

Comparison of approaches for simulating reactive solute transport involving organic degradation reactions by multiple terminal electron acceptors: Computers and Geosciences, v. 29, no. 3, p. 319-329, doi:10.1016/S0098-3004(03)00008-6.

Davis, J.A., and Curtis, G.P., 2003,

Application of surface complexation modeling to describe uranium (VI) adsorption and retardation at the uranium mill tailings site at Naturita, Colorado: U.S. Nuclear Regulatory Commission Report NUREG CR-6820.

Ellefsen, K.J., 2003,

seg2_edit--A program for editing and manipulating SEG-2 files: U.S. Geological Survey Open-File Report 03-141, 11 p.

Essaid, H.I., Cozzarelli, I.M., Eganhouse, R.P., Herkelrath, W.N., Bekins, B.A., and Delin, G.N., 2003,

Inverse modeling of BTEX dissolution and biodegradation at the Bemidji, MN crude-oil spill site: Journal of Contaminant Hydrology, v. 67, no. 1-4, p. 269-299, doi:10.1016/S0169-7722(03)00034-2.

Glynn, P.D., 2003,

Modeling Np and Pu transport with a surface complexation model and spatially variant sorption capacities--implications for reactive transport modeling and performance assessments of nuclear waste disposal sites: Computers and Geosciences, v. 29, no. 3, p. 331-349, doi:10.1016/S0098-3004(03)00009-8.

Harvey, J.W., Conklin, M.H., and Koelsch, R.S., 2003,

Predicting changes in hydrologic retention in an evolving semi-arid alluvial stream: Advances in Water Resources, v. 26, no. 9, p. 939-950, doi:10.1016/S0309-1708(03)00085-X.

Kimball, B.A., Runkel, R.L., and Walton-Day, K., 2003,

Use of field-scale experiments and reactive transport modeling to evaluate remediation alternatives in streams affected by acid mine drainage, in Jambor, J.L., Blowes, D.W., and Ritchie, A.I.M., eds., Environmental Aspects of Mine Wastes: Mineralogical Association of Canada, Short Course Series, v. 31, p. 261-282.

Konikow, L.F., and Hornberger, G.Z., 2003,

Use of boundary fluxes when simulating solute transport with the MODFLOW ground-water transport process: U.S. Geological Survey Open-File Report 2003-303, 17 p.

Mayers, C.J., 2003,

Modeling tritium transport through a deep unsaturated zone, Amargosa Desert Research Site, Nye County, Nevada: Reno, University of Nevada, M.S. thesis, 130 p.

Nordstrom, D.K., 2003,

Modeling low-temperature geochemical processes (chapter 2), in Drever, J.I., ed., Treatise on Geochemistry: Elsevier, v. 5 of 10 volumes, p. 1-38, ISBN:9780080437514.

Nordstrom, D.K., and Archer, D.G., 2003,

Arsenic thermodynamic data and environmental geochemistry, in Welch, A.H., and Stollenwerk, K.G., eds., Arsenic in ground water--Geochemistry and Occurrence: Boston, Kluwer Academic Publishers, p. 1-25.

Ortiz, R.F., and Ball, J.W., 2003,

Summary of synoptic sampling and tracer-injection tests in the Alamosa River Basin during low-flow conditions, October 1998--A sampling analysis report for modeling reactive transport of metals for the Summitville Mine: U.S. Geological Survey Open-File Report 03-466, 55 p.

Ortiz, R.F., and Ball, J.W., 2003,

Summary of synoptic sampling and tracer-injection tests in the Alamosa River basin during high-flow conditions, June 1999--A sampling analysis report for modeling reactive transport of metals for the Summitville Mine, Colorado: U.S. Geological Survey Open-File Report 03-467, 60 p.

Parkhurst, D.L., Stollenwerk, K.G., and Colman, J.A., 2003,

Reactive-transport simulation of phosphorus in the sewage plume at the Massachusetts Military Reservation, Cape Cod, Massachusetts: U.S. Geological Survey Water-Resources Investigations Report 03-4017, 33 p.

Runkel, R.L., McKnight, D.M., and Rajaram, H., 2003,

Modeling hyporheic zone processes: Advances in Water Resources, v. 26, no. 9, p. 901-905, doi:10.1016/S0309-1708(03)00079-4.

Russell, T.F., Heberton, C.I., Konikow, L.F., and Hornberger, G.Z., 2003,

A finite-volume ELLAM for three-dimensional solute-transport modeling: Ground Water, v. 41, no. 2, p. 258-272, doi:10.1111/j.1745-6584.2003.tb02589.x.

Scanlon, B.R., Keese, K., Reedy, R.C., Šimůnek, J., and Andraski, B.J., 2003,

Variations in flow and transport in thick desert vadose zones in response to paleoclimatic forcing (0-90 kyr)--Field measurements, modeling, and uncertainties: Water Resources Research, v. 39, no. 7, p. 3-1 to 3-17, 2002WR001604, doi:10.1029/2002WR001604.

Scott, D.T., Gooseff, M.N., Bencala, K.E., and Runke., R.L., 2003,

Automated calibration of a stream solute transport model--Implications for interpretation of biogeochemical parameters: Journal of the North American Benthological Society, v. 22, no. 4, p. 492-510.

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.

Stollenwerk, K.G., 2003,

Geochemical processes controlling transport of arsenic in groundwater--A review of adsorption, in Welch, A.H., and Stollenwerk, K.G., eds., Arsenic in ground water--Geochemistry and occurrence: Boston, Kluwer Academic Publishers, p. 67-100.

Stollenwerk, K.G., and Colman, J.A., 2003,

Natural remediation potential of arsenic-contaminated ground water, in Welch, A.H., and Stollenwerk, K.G., eds., Arsenic in Groundwater--Geochemistry and Occurrence: Boston, Kluwer Academic Press, p. 351-379.

Tiedeman, C.R., and Hsieh, P.A., 2003,

Evaluation of longitudinal dispersivity estimates from forced-gradient tracer tests in heterogeneous aquifers, in Kovar, K., and Zbynek, H., eds., Calibration and Reliability in Groundwater Modelling--A Few Steps Closer to Reality: IAHS Publication 277, p. 168-174.

Walter, D.A., and Masterson, J.P., 2003,

Simulation of advective flow under steady-state and transient recharge conditions, Camp Edwards, Massachusetts Military Reservation, Cape Cod, Massachusetts: U.S. Geological Survey Water-Resources Investigations Report 03-4053, 51 p.

Waychunas, G.A., Fuller, C.C., Davis, J.A., and Rehr, J.J., 2003,

Surface complexation and precipitate geometry of aqueous Zn(II) sorption on ferrihydrite--II. XANES analysis and simulation: Geochimica et Cosmochimica Acta, v. 67, p. 1031-1043, doi:10.1016/S0016-7037(02)01280-2.

Welch, A.H., Stollenwerk, K.G., Maurer, D.K., and Feinson, L.S., 2003,

In situ arsenic remediation in a fractured, alkaline aquifer, in Welch, A.H., and Stollenwerk, K.G., eds., Arsenic in ground water--Geochemistry and occurrence: Boston, Kluwer Academic Publishers, p. 403-419.

Welch, A.H., and Stollenwerk, K.G., eds., 2003,

Arsenic in ground water--Geochemistry and occurrence: Boston, Kluwer Academic Publishers, 475 p., ISBN:978-1-4020-7317-5,

Winston, R.B., and Voss, C.I., 2003,

SutraGUI, a graphical interface for SUTRA, a model for ground-water flow with solute or energy transport: U.S. Geological Survey Open-File Report 2003-285, 114 p.

Abbott, M.L., Susong, D.D., Krabbenhoft, D.P., and Rood, A.S., 2002,

Mercury deposition in snow near an industrial emission source in the western U.S. and comparison to ISC3 model predictions: Water, Air, and Soil Pollution, v. 139, no. 1-4, p. 95-114, doi:10.1023/A:1015856717964.

Charlton, S.R., and Parkhurst, D.L., 2002,

PHREEQCI--A graphical user interface to the geochemical model PHREEQC: U.S. Geological Survey Fact Sheet 031-02, 2 p.

Friedly, J.C., Kent, D.B., and Davis, J.A., 2002,

Simulation of the mobility of metal-EDTA complexes in groundwater--The influence of contaminant metals: Environmental Science and Technology, v. 36, no. 3, p. 355-363, doi:10.1021/es010926m.

Guarini, J.-M., Cloern, J.E., Edmunds, J., and Gros, P., 2002,

Spatial variability of microphytobenthos photosynthesis in tidal estuaries--A modeling approach with applications to San Francisco Bay: Estuaries, v. 25, p. 409-417.

Haverkamp, R., Nimmo, J.R., and Reggiani, P., 2002,

Property-transfer models, in Dane, J.H., and Topp, G.C., eds., Methods of Soil Analysis, Part 4, Physical Methods: Madison, Wisconsin, Soil Science Society of America, p. 759-761.

Hornberger, G.Z., Konikow, L.F., and Harte, P.T., 2002,

Simulating solute transport across horizontal-flow barriers using the MODFLOW ground-water transport process: U.S. Geological Survey Open-File Report 02-52, 28 p.

Hsieh, P.A., 2002,

Some thoughts on modeling flow in fractured rocks: International Groundwater Modeling Center Newsletter, Spring 2002, p. 2.

Hsieh, P.A., and Winston, R.B., 2002,

User's guide to model viewer, a program for three-dimensional visualization of ground-water model results: U.S. Geological Survey Open-File Report 02-106, 18 p.

Killingstad, M.W., Widdowson, M.A., and Smith, R.L., 2002,

Modeling enhanced in situ denitrification in groundwater: Journal of Environmental Engineering, v. 128, no. 6, p. 491-504, doi:10.1061/(ASCE)0733-9372(2002)128:6(491).

Lewis-Brown, J.C., and Rice, D.E., 2002,

Simulated ground-water flow, Naval Air Warfare Center, West Trenton, New Jersey: U.S. Geological Survey Water-Resources Investigations Report 02-4019, 49 p.

Lucas, L.V., and Cloern, J.E., 2002,

Effects of tidal shallowing and deepening on phytoplankton production dynamics--a modeling study: Esturaries, v. 25, p. 497-507.

Masterson, J.P., Hess, K.M., Walter, D.A., and LeBlanc, D.R., 2002,

Simulated changes in the sources of ground water for public-supply wells, ponds, streams, and coastal areas on western Cape Cod, Massachusetts: U.S. Geological Survey Water-Resources Investigations Report 02-4143, 12 p.

McDonald, M.G., and Konikow, L.F., 2002,

Let there be standing--An editorial: The AGWSE Newszine, Newsletter of the Association of Ground Water Scientists and Engineers, v. February 2002.

McIsaac, G.F., David, M.B., Gertner, G.Z., and Goolsby, D.A., 2002,

Relating net nitrogen input in the Mississippi River Basin to nitrate flux in the Lower Mississippi River--A comparison of approaches: Journal of Environmental Quality, v. 31, p. 1610-1622.

Nimmo, J.R., 2002,

Property transfer from particle and aggregate size to water retention [property-transfer models], in Dane, J.H., and Topp, G.C., eds., Methods of Soil Analysis, Part 4, Physical Methods: Madison, Wisconsin, Soil Science Society of America, p. 777-782.

Peterson, D.H., Cayan, D.R., Smith, R.E., Dettinger, M.D., and Riddle, L.G., 2002,

Retrospective appraisal of the 2000 maximum flow forecasts: California Applications Program, Scripps Institute of Oceanography.

Runkel, R.L., and Kimball, B.A., 2002,

Evaluating remedial alternatives for an acid mine drainage stream--Application of a reactive transport model: Environmental Science and Technology, v. 36, no. 5, p. 1093-1101, doi:10.1021/es0109794.

Thorstenson, D.C., and Parkhurst, D.L., 2002,

Calculation of individual isotope equilibrium constants for implementation in geochemical models: U.S. Geological Survey Water-Resources Investigations Report 02-4172, 129 p.

Walter, D.A., Masterson, J.P., and LeBlanc, D.R., 2002,

Simulated pond-aquifer interactions under natural and stressed conditions near Snake Pond, Cape Cod, Massachusetts: U.S. Geological Survey Water-Resources Investigations Report 99-4174, 35 p.

Walton-Day, K., Kimball, B.A., and Runkel, R.L., 2002,

The use of mass-loading studies and solute transport modeling to assist in the development of TMDL's for streams affected by mine drainage, in Workshop Notebook, Colorado Department of Health and Environment, 10th National Nonpoint Source Monitoring Workshop, Breckenridge, Colorado, September 8-12, 2002, 5 p.

Ball, J.W., Runkel, R.L., and Nordstrom, D.K., 2001,

Reactive transport modeling at high-flow - Wightman Fork/Alamosa River, USA, in Cidu, R., ed., Proceedings of the Tenth International Symposium on Water - Rock Interaction, Villasimius, Italy, July 10-15, 2001: A.A. Balkema Publishers, v. 2, p. 1181-1184.

Chiou, C.T., Sheng, G., and Manes, M., 2001,

A partition-limited model for the plant uptake of organic contaminants from soil and water: Environmental Science and Technology, v. 35, no. 7, p. 1437-1444, doi:10.1021/es0017561.

Christensen, F.D., Engesgaard, P., and Kipp, K.L., 2001,

A reactive transport investigation of seawater intrusion experiment in a shallow aquifer, Skansehage, Denmark, in Proceedings of the First International Conference on Saltwater Intrusion and Coastal Aquifers, Essaouira, Morocco, April 23-35, 2001.

Cloern, J.E., 2001,

Our evolving conceptual model of the coastal eutrophication problem: Marine Ecology Progress Series, v. 210, p. 223-253, doi:10.3354/meps210223.

Dillard, L.A., Essaid, H.I., and Blunt, M.J., 2001,

A functional relation for field-scale nonaqueous phase liquid dissolution developed using a pore network model: Journal of Contaminant Hydrology, v. 48, no. 1-2, p. 89-119, doi:10.1016/S0169-7722(00)00171-6.

Friedel, M.J., 2001,

Documentation and verification of VST2D--A model for simulating transient, variably saturated, coupled water-heat-solute transport in heterogeneous, anisotropic, 2-dimensional, ground-water systems with variable fluid density: U.S. Geological Survey Water-Resources Investigations Report 00-4105, 2 fold-in oversize sheets and 124 p.

Hill, M.C., Ely, D.M., Tiedeman, C.R., O'Brien, G.M., D'Agnese, F.A., and Faunt, C.C., 2001,

Preliminary evaluation of the importance of existing hydraulic-head observation locations to advective transport predictions, Death Valley regional flow system, California and Nevada: U.S. Geological Survey Water-Resources Investigations Report 00-4282.

Hsieh, P.A., 2001,

TopoDrive and ParticleFlow--Two computer models for simulation and visualization of ground-water flow and transport of fluid particles in two dimensions: U.S. Geological Survey Open-File Report 2001-286, 30 p.

Hsieh, P.A., and others, a., 2001,

Conceptual models of flow and transport in the fractured vadose zone: Washington, D.C., National Academy Press, p.

Hunt, R.J., Steuer, J.J., Mansor, M.T.C., and Bullen, T.D., 2001,

Delineating a recharge area for a spring using numerical modeling, Monte Carlo techniques, and geochemical investigation: Ground Water, v. 39, no. 5, p. 702-712, doi:10.1111/j.1745-6584.2001.tb02360.x.

Karapanagioti, H., Gossard, C.M., Strevett, K.A., Kolar, R.L., and Sabatini, D.A., 2001,

Model coupling intraparticle diffusion/sorption, nonlinear sorption, and biodegradation processes: Journal of Contaminant Hydrology, v. 48, no. 1-2, p. 1-21, doi:1016/S0169-7722(00)00179-0.

Konikow, L.F., Harte, P.T., and Hornberger, G.Z., 2001,

Simulating solute transport across horizontal-flow barriers, in Seo, Poeter, and Zheng, eds., Proceedings MODFLOW 2001 and other modeling odysseys conference, Ground Water Modeling Center, Colorado School of Mines, Golden, Colorado, September 2001: p. 510-516.

Moench, A.F., and Kharaka, Y.K., 2001,

Analytical model for deep well injection of cold brine into a hot aquifer, in Cidu, R., ed., Proceedings of the Tenth International Symposium WRI-10, Villasimius, Italy, June 10-15, 2001: A.A. Balkema, v. 1, p. 193-196.

Pabich, W.J., 2001,

Denitrification of anthropogenic nitrogen in groundwater--Measurement and modeling using stable isotopic and mass balance approaches: Cambridge, Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, unpublished Ph.D. thesis, 188 p.

Peterson, D.H., Cayan, D.R., Smith, R.E., Dettinger, M.D., and Riddle, L., 2001,

An experimental forecast of maximum daily snowmelt discharge for the year 2001: Scripps Institution of Oceanography, California Applications Program, December 18, 2001.

Reddy, M.M., and Aiken, G.R., 2001,

Fluvic acid-sulfide ion competition for mercury ion binding in the Florida everglades: Water, Air, and Soil Pollution, v. 132, p. 89-104, doi:10.1023/A:1012073503678.

Tiedeman, C.R., Hill, M.C., D'Agnese, F.A., and Faunt, C.C., 2001,

Identifying model parameters important to preductions for guiding hydrogeologic data collection, in Proceedings, MODFLOW-2001, Golden, Colorado, September 2001: p. 195-201.

Winston, R.B., 2001,

MODFLOW GUI and GW-Chart--Tools for building and interpreting MODFLOW models, in Seo, Poeter, and Zheng, eds., Proceedings MODFLOW 2001 and Other Modeling Odysseys Conference, Ground Water Modeling Center, Colorado School of Mines, Golden, Colorado, September 2001: p. 723-727.

Winston, R.B., 2001,

Programs for simplifying the analysis of geographic information in U.S. Geological Survey ground-water models: U.S. Geological Survey Open-File Report 01-392, 67 p.

Worrall, F., 2001,

A molecular topology approach to predicting pesticide pollution of groundwater: Environmental Science and Technology, v. 35, no. 11, p. 2282-2287, doi:10.1021/es001593g.

Zheng, C., Hill, M.C., and Hsieh, P.A., 2001,

MODFLOW-2000, the U.S. Geological Survey modular ground-water model--User guide to the LMT6 package, the linkage with MT3DMS for multi-species mass transport modeling: U.S. Geological Survey Open-File Report 01-82, 43 p.

Abrams, R.H., and Loague, K., 2000,

A compartmentalized solute transport model for redox zones in contaminated aquifers--1, Theory and development: Water Resources Research, v. 36, no. 8, p. 2001-2013, 2000WR900110, doi:10.1029/2000WR900110.

Abrams, R.H., and Loague, K., 2000,

A compartmentalized solute transport model for redox zones in contaminated aquifers--2, Field-scale simulations: Water Resources Research, v. 36, no. 8, p. 2015--2029, 10.1029/2000WR900111, doi:10.1029/2000WR900111.

Andraski, B.J., and Jacobson, E.A., 2000,

Testing a full-range soil-water retention function in modeling water potential and temperature: Water Resources Research, v. 36, no. 10, p. 3081-3089, 2000WR900193, doi:10.1029/2000WR900193.

Ball, J.W., Nordstrom, D.K., and Runkel, R.L., 2000,

Reactive and non-reactive transport modeling for Wightman Fork, Summitville Mine, Colorado--Application of the OTIS/OTEQ model to a low-flow synoptic study, in Proceedings from the Fifth International Conference on Acid Rock Drainage, Denver, Colorado, May 21-24, 2000: Littleton, Colo., Society for Mining, Metallurgy, and Exploration, v. 1 of 2, p. 125-134.

Boyer, E.W., Hornberger, G.M., Bencala, K.E., and McKnight, D.M., 2000,

Effects of asynchronous snowmelt on flushing of dissolved organic carbon--A mixing model approach: Hydrological Processes, v. 14, no. 18, p. 3291-3308, doi:10.1002/1099-1085(20001230)14:18<3291::AID-HYP202>3.0.CO;2-2.

Boyle, T.P., and Gustina, G.W., 2000,

A strategy for use of multivariate methods of analysis of benthic macroinvertebrate communities to assess mine-related ecological stress, in Proceedings of the Fifth International Conference on Acid Rock Drainage, Denver, Colorado, May 21-24, 2000: Littleton, Colo., Society for Mining, Metallurgy, and Exploration, p. 1425-1432.

Brown, J.G., Bassett, R.L., and Glynn, P.D., 2000,

Reactive transport of metal contaminants in alluvium--Model comparison and column simulation: Applied Geochemistry, v. 15, no. 1, p. 35-50, doi:10.1016/S0883-2927(99)00004-9.

Cabaniss, S.E., Zhou, Q., Maurice, P.A., Chin, Y., and Aiken, G.R., 2000,

A log-normal distribution model for the molecular weight of aquatic fulvic acids: Environmental Science and Technology, v. 34, no. 6, p. 1103-1109, doi:10.1021/es990555y.

Chapelle, F.H., Robertson, J.F., Landmeyer, J.E., and Bradley, P.M., 2000,

Methodology for applying monitored natural attenuation to petroleum hydrocarbon-contaminated ground-water systems with examples from South Carolina: U.S. Geological Survey Water-Resources Investigations Report 00-4161, 47. A 3 1/2" disk is included p.

Day-Lewis, F.D., Hsieh, P.A., and Gorelick, S.M., 2000,

Identifying fracture-zone geometry using simulated annealing and hydraulic-connection data: Water Resources Research, v. 36, no. 7, p. 1707-1721, 2000WR900073, doi:10.1029/2000WR900073.

Dillard, L.A., and Blunt, M.J., 2000,

Development of a pore network simulation model to study nonaqueous phase liquid dissolution: Water Resources Research, v. 36, no. 2, p. 439-454, 1999WR900301, doi:10.1029/1999WR900301.

Ellefsen, K.J., 2000,

check_picks_x -- A program for checking the travel time picks of crosswell seismic and radar data: U.S. Geological Survey Open-File Report 00-109.

Goolsby, D.A., and Battaglin, W.A., 2000,

Nitrogen in the Mississippi Basin--Estimating sources and predicting flux to the Gulf of Mexico: U.S. Geological Survey Fact Sheet 135-00, 6 p.

Healy, R.W., and Russell, T.F., 2000,

Treatment of internal sources in the finite-volume ELLAM, in Proceedings of the XEEI International Conference on Computational Methods in Water Resources, Calgary, Alberta, June 25-29, 2000: p. 619-622.

Heberton, C.I., Russell, T.F., Konikow, L.F., and Hornberger, G.Z., 2000,

A three-dimensional finite-volume Euleiian-Lagrangian localized adjoint method (ELLAM) for solute-transport modeling: U.S. Geological Survey Water-Resources Investigations Report 00-4087, 63 p.

Heberton, C.I., Russell, T.F., Konikow, L.F., and Hornberger, G.Z., 2000,

Three-dimensional finite-volume F-LLAM implementation, in Bentley, and others, eds., Computational Methods in Water Resources: Rotterdam, A.A. Balkema, p. 603-610.

Hsieh, P.A., 2000,

A brief survey of hydraulic tests in fractured rocks, in Faybishenko, B., Witherspoon, P.A., and Benson, S.M., eds., American Geophysical Union Geophysical Monograph 122: Washington, D.C., p. 59-66.

Hsieh, P.A., Wingle, W., and Healy, R.W., 2000,

VS2DTI - A graphical software package for simulating fluid flow and solute or energy transport in variably saturated porous media: U.S. Geological Survey Water-Resources Investigations Report 99-4130, 16 p.

Hutchinson, G.L., Livingston, G.P., Healy, R.W., and Striegl, R.G., 2000,

Chamber measurement of surface-atmosphere trace gas exchange--Numerical evaluation of dependence on soil interfacial layer, and source/sink products: Journal of Geophysical Research, v. 105, no. D7, p. 8865-8875.

Kent, D.B., Abrams, R.H., Davis, J.A., Coston, J.A., and LeBlanc, D.R., 2000,

Modeling the influence of variable pH on the transport of zinc in a contaminated aquifer using semiempirical surface complexation models: Water Resources Research, v. 36, no. 12, p. 3411-3425, 2000WR900244, doi:10.1029/2000WR900244.

Lahvis, M.A., and Rehmann, L.C., 2000,

Simulation of transport of methyl tert-butyl ether (MTBE) to groundwater from small volume releases of gasoline in the vadose zone: American Petroleum Institute Soil and Groundwater Research Bulletin 10, 8 p.

Lane, J.W., Jr., Buursink, M.L., Haeni, F.P., and Versteeg, R.J., 2000,

Evaluation of ground-penetrating radar to detect free-phase hydrocarbons in fractured rocks--Results of numerical modeling and physical experiments: Ground Water, v. 38, no. 6, p. 929-938.

Luoma, S.N., and Presser, T.S., 2000,

Forecasting selenium discharges to the San Francisco Bay-Delta Estuary--Ecological effects of a proposed San Luis drain extension: U.S. Geological Survey Open-File Report 00-416, 256 p.

Merritt, M.L., and Konikow, L.F., 2000,

Documentation of a computer program to simulate lake-aquifer interaction using the MODFLOW ground-water flow model and the MOC3D solute-transport model: U.S. Geological Survey Water-Resources Investigations Report 00-4167, 146 p.

Niswonger, J., and Rupp, J., 2000,

Monte Carlo analysis of streambed water flux rates, in Proceedings of the Riparian Ecology Management in Multi-land Use Watersheds, Portland, Oregon: American Water Resources Association, p. 161-166.

Packman, A.I., and Bencala, K.E., 2000,

Modeling surface - subsurface hydrologic interactions, in Jones, J.B., and Mulholland, P.J., eds., Streams and Ground Waters: Academic Press, p. 45-80.

Parkhurst, D.L., Thorstenson, D.C., and Kipp, K.L., 2000,

Calculating carbon-isotope compositions in an unsaturated zone with seasonally varying CO2 production, in Wang, Y., ed., Proceedings of the International Symposium on Hydrogeology and the Environment, Wuhan, Peoples Republic of China, October 17-21, 2000: p. 220-224.

Peng, W.-S., Hampton, D.R., Konikow, L.F., Kambham, K.K.R., and Benegar, I.J., 2000,

Can contaminant transport models predict breakthrough?: Ground Water Monitoring and Remediation, v. 20, p. 104-113.

Runkel, R.L., 2000,

Using OTIS to model solute transport in streams and rivers: U.S. Geological Survey Fact Sheet 138-99, 4 p.

Russell, T.F., and Healy, R.W., 2000,

Analytical tracking along streamlines in temporally linear Raviart-Thomas velocity fields, in Proceedings of the XIII International Conference on Computational Methods in Water Resources, Calgary, Alberta, June 25-29, 2000: p. 631-638.

Sanford, W.E., Plummer, L.N., McAda, D.P., Bexfield, L.M., and Anderholm, S.K., 2000,

Estimation of hydrologic parameters for the ground-water model of the Middle Rio Grande Basin using carbon-14 and water-level data, in Cole, J.C., ed., U.S. Geological Survey Middle Rio Grande Basin Study--Proceedings of the Fourth Annual Workshop, Albuquerque, New Mexico, February 15-16, 2000: U.S. Geological Survey Open-File Report 00-488.

Scholl, M.A., 2000,

Effects of heterogeneity in aquifer permeability and biomass on biodegradation rate calculations--Results from numerical simulations: Ground Water, v. 38, no. 5, p. 702-712.

Tauler, R., Bercelo, D., and Thurman, E.M., 2000,

Multivariate correlation between concentrations of selected herbicides and derivatives in outflows from selected U.S. midwestern reservoirs: Environmental Science and Technology, v. 34, no. 16, p. 3307-3314, doi:10.1021/es000884m.

Waite, T.D., Davis, J.A., Fenton, B.R., and Payne, T.E., 2000,

Approaches to modelling uranium (VI) adsorption on natural mineral assemblages: Radiochimica Acta, v. 88, p. 687-696.

Walton-Day, K., Runkel, R.L., Kimball, B.A., and Bencala, K.E., 2000,

Application of the solute-transport models OTIS and OTEQ and implications for remediation in a watershed affected by acid mine drainage, Cement Creek, Animas River basin, Colorado, in Proceedings from the Fifth International Conference on Acid Rock Drainage, Denver, Colorado, May 21-24, 2000: Littleton, Colo., Society for Mining, Metallurgy, and Exploration, p. 389-399.

Winston, R.B., 2000,

Graphical user interface for MODFLOW, version 4: U.S. Geological Survey Open-File Report 00-315, 27 p.

Woodbury, A.D., and Rubin, Y., 2000,

A full-Bayesian approach to parameter inference from tracer travel time moments and investigation of scale effects at the Cape Cod experimental site: Water Resources Research, v. 36, no. 1, p. 159-171, 1999WR900273, doi:10.1029/1999WR900273.

Wright, D.L., Smith, D.V., Abraham, J.D., Hutton, R.S., Bond, E.K., Chi, T.J., Alaeddin, A.A., and Chew, W.C., 2000,

Imaging and modeling new VETEM data, in Noon, D.A., Stickley, G.F., and Longstaff, D., eds., Proceedings of the Eighth International Conference on Ground Penetrating Radar, Gold Coast, Queensland, Australia, May 23-26, 2000: University of Queensland, Cooperative Research Centre for Sensor Signal and Information Processing (CSSIP), p. 146-150.

Abrams, R.H., 1999,

A compartmentalized approach to simulating redox zones in contaminated aquifers: Stanford, Calif., Stanford University, Department of Geological and Environmental Sciences, unpublished Ph.D. thesis, 182 p.

Alpers, C.N., and Nordstrom, D.K., 1999,

Geochemical modeling of water-rock interactions in mining environments, in Plumlee, G.S., and Logsdon, M.J., eds., The environmental geochemistry of mineral deposits--Part 1. Processes, methods and health issues: Reviews in Economic Geology, v. 6A, p. 289-324.

Angeroth, C.E., Leake, S.A., and Wagner, B.J., 1999,

Preliminary model development of the ground- and surface-water system in Pinal Creek Basin, Arizona, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 1 of 3--Contamination from Hardrock Mining: U.S. Geological Survey Water-Resources Investigations Report 99-4018A, p. 211-216.

Ball, J.W., Runkel, R.L., and Nordstrom, D.K., 1999,

Transport modeling of reactive and non-reactive constituents from Summitville, Colorado--Preliminary results from the application of the OTIS/OTEQ model to the Wightman Fork/Alamosa River System, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 1 of 3--Contamination from Hardrock Mining: U.S. Geological Survey Water-Resources Investigations Report 99-4018A, p. 305-311.

Bartolino, J.R., and Niswonger, R., 1999,

Numerical simulation of vertical ground-water flux of the Rio Grande from ground-water temperature profiles, Central New Mexico: U.S. Geological Survey Water-Resources Investigations Report 99-4212, 34 p.

Besser, J.M., and Leib, K.J., 1999,

Modeling frequency of occurrence of toxic concentrations of zinc and copper in the Upper Animas River, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 1 of 3--Contamination from Hardrock Mining: U.S. Geological Survey Water-Resources Investigations Report 99-4018A, p. 75-81.

Brown, J.G., Glynn, P.D., and Bassett, R.L., 1999,

Geochemistry and reactive-transport of metal contaminants in ground water, Pinal Creek Basin, Arizona, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 1 of 3--Contamination from Hardrock Mining: U.S. Geological Survey Water-Resources Investigations Report 99-4018A, p. 141-153.

Brusseau, M.L., and Srivastava, R., 1999,

Nonideal transport of reactive solutes in heterogeneous porous media--4, Analysis of the Cape Cod natural-gradient field experiment: Water Resources Research, v. 35, no. 4, p. 1113-1125, 1998WR900019, doi:10.1029/1998WR900019.

Chapra, S.C., and Runkel, R.L., 1999,

Modeling impact of storage zones on stream dissolved oxygen: Journal of Environmental Engineering, v. 125, no. 5, p. 415-419.

Church, C.D., Tratnyek, P.G., Pankow, J.F., Landmeyer, J.E., Baehr, A.L., Thomas, M.A., and Schirmer, M., 1999,

Effects of environmental conditions on MTBE degradation in model column aquifers, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 3 of 3--Subsurface Contamination from Point Sources: U.S. Geological Survey Water-Resources Investigations Report 99-4018C, p. 93-101.

Curtis, G.P., Cozzarelli, I.M., Baedecker, M.J., and Bekins, B.A., 1999,

Coupled biogeochemical modeling of ground water contamination at the Bemidji, Minnesota, crude oil spill site, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 3 of 3--Subsurface Contamination from Point Sources: U.S. Geological Survey Water-Resources Investigations Report 99-4018C, p. 153-158.

Day-Lewis, F.D., Hsieh, P.A., Shapiro, A.M., and Gorelick, S.M., 1999,

Geostatistical simulation of high-transmissivity zones at the Mirror Lake Site in New Hampshire--Conditioning to hydraulic information, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 3 of 3--Subsurface Contamination from Point Sources: U.S. Geological Survey Water-Resources Investigations Report 99-4018C, p. 685-693.

Diodato, D.M., 1999,

Simulation of mass transport using the FracTran98 Module of FracSys2000, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 3 of 3--Subsurface Contamination from Point Sources: U.S. Geological Survey Water-Resources Investigations Report 99-4018C, p. 833-840.

Ellefsen, K.J., 1999,

pick_xwell -- A program for interactive picking of crosswell seismic and radar data: U.S. Geological Survey Open-File Report 99-534.

English, C.A., Gartner, J.W., Smith, R.E., and Cheng, R.T., 1999,

A marine nowcast system for San Francisco Bay, California, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 2 of 3--Contamination of Hydrologic Systems and Related Ecosystems: U.S. Geological Survey Water-Resources Investigations Report 99-4018B, p. 65-68.

Goode, D.J., 1999,

Modifications to the solute-transport model MOC3D for simple reactions, double porosity, and age, with application at Mirror Lake, New Hampshire, and other sites, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 3 of 3--Subsurface Contamination from Point Sources: U.S. Geological Survey Water-Resources Investigations Report 99-4018C, p. 821-832.

Goode, D.J., 1999,

Simulating contaminant attenuation, double-porosity exchange, and water age in aquifers using MOC3D: U.S. Geological Survey Fact Sheet 086-99, 4 p.

Hess, K.M., Davis, J.A., Coston, J.A., and Kent, D.B., 1999,

Multispecies reactive transport in an aquifer with spatially variable chemical conditions--Dispersion of bromide and nickel tracers, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 3 of 3--Subsurface Contamination from Point Sources: U.S. Geological Survey Water-Resources Investigations Report 99-4018C, p. 393-404.

Hornecker, M.M., 1999,

Automated soil moisture observations and infiltration modeling at the closed Norman, Oklahoma Landfill: Norman, University of Oklahoma, School of Civil Engineering and Environmental Science, unpublished Masters thesis, 165 p.

Hsieh, P.A., Shapiro, A.M., and Tiedeman, C.R., 1999,

Computer simulation of fluid flow in fractured rocks at the Mirror Lake FSE well field, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 3 of 3--Subsurface Contamination from Point Sources: U.S. Geological Survey Water-Resources Investigations Report 99-4018C, p. 777-781.

Kent, D.B., Abrams, R.H., Davis, J.A., and Coston, J.A., 1999,

Modeling the influence of adsorption on the fate and transport of metals in shallow ground water--Zinc contamination in the sewage plume on Cape Cod, Massachusetts, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 3 of 3--Subsurface Contamination from Point Sources: U.S. Geological Survey Water-Resources Investigations Report 99-4018C, p. 361-369.

Konikow, L.F., and Ewing, R.C., 1999,

Is a probabilistic performance assessment enough?: Ground Water, v. 37, no. 4, p. 481-482.

Lahvis, M.A., and Rehmann, L.C., 1999,

Simulation of methyl tert-butyl ether (MTBE) transport to ground water from immobile sources of gasoline in the vadose zone, in Stanley, A., ed., Proceedings of the 2000 Petroleum Hydrocarbons and Organic Chemicals in Ground Water--Prevention, Detection, and Remediation, Houston, Texas, November 17-19, 1999: Westerville, Ohio, National Ground Water Association, p. 247-259.

Paillet, F.L., 1999,

Characterizing fractured-zone flow using numerical flow-log models, in Amadei, B., Kranz, R.L., Scott, G.A., and Smeallie, P.H., eds., Rock Mechanics for Industry--Proceedings of the 37th U.S. Rock Mechanics Symposium, June 6-9, 1999: Rotterdam, Netherlands, A.A. Balkema, v. 2, p. 819-826.

Papoulias, D.M., Noltie, D.B., and Tillitt, D.E., 1999,

A model fish system to test chemical effects on sexual differentiation and development, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 2 of 3--Contamination of Hydrologic Systems and Related Ecosystems: U.S. Geological Survey Water-Resources Investigations Report 99-4018B, p. 447-453.

Parkhurst, D.L., and Appelo, C.A.J., 1999,

User's guide to PHREEQC--A computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations: U.S. Geological Survey Water-Resources Investigations Report 99-4259, 312 p.

Peterson, D.H., Smith, R.E., Dettinger, M.D., Cayan, D.R., Hager, S.W., and Schemel, L.E., 1999,

Forecasting spring discharge in the west--A step towards forecasting stream chemistry, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 2 of 3--Contamination of Hydrologic Systems and Related Ecosystems: U.S. Geological Survey Water-Resources Investigations Report 99-4018B, p. 51-58.

Rehmann, L.L.C., Welty, C., and Harvey, R.W., 1999,

Stochastic analysis of virus transport in aquifers: Water Resources Research, v. 35, no. 7, p. 1987-2006, 1999WR900059, doi:10.1029/1999WR900059.

Runkel, R.L., Bencala, K.E., and Kimball, B.A., 1999,

Modeling solute transport and geochemistry in streams and rivers using OTIS and OTEQ, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 1 of 3--Contamination from Hardrock Mining: U.S. Geological Survey Water-Resources Investigations Report 99-4018A, p. 109-118.

Runkel, R.L., Kimball, B.A., McKnight, D.M., and Bencala, K.E., 1999,

Reactive solute transport in streams--A surface complexation approach for trace metal sorption: Water Resources Research, v. 35, no. 12, p. 3829-3840, 1999WR900259, doi:10.1029/1999WR900259.

Singha, K., 1999,

Use of a physical model of fractured bedrock to characterize ground-penetrating radar response to fracture content: Storrs, University of Connecticut, Unpublished Honors Thesis, 31 p.

Stollenwerk, K.G., and Parkhurst, D.L., 1999,

Modeling the evolution and natural remediation of a ground-water sewage plume, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 3 of 3--Subsurface Contamination from Point Sources: U.S. Geological Survey Water-Resources Investigations Report 99-4018C, p. 371-381.

Walton-Day, K., Runkel, R.L., Kimball, B.A., and Bencala, K.E., 1999,

Application of the solute-transport models OTIS and OTEQ and implications for remediation in a watershed affected by acid mine drainage, Cement Creek, Animas River Basin, Colorado, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 1 of 3--Contamination from Hardrock Mining: U.S. Geological Survey Water-Resources Investigations Report 99-4018A, p. 37-46.

Winston, R.B., 1999,

Upgrade to MODFLOW-GUI--Addition of MODPATH ZONEBUDGET, and additional MODFLOW packages to the U.S. Geological Survey MODFLOW-96 graphical-user interface: U.S. Geological Survey Open-File Report 99-184, 64 p.

Woodward, D.F., Farag, A.M., DeLonay, A.J., Cleveland, L.J., Brumbaugh, W.G., and Little, E.E., 1999,

The potential for contaminated ground water to adversely affect chinook salmon under exposure conditions simulating the Hanford Reach of the Columbia River, Washington, USA, in Morganwalp, D.W., and Buxton, H.T., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings of the Technical Meeting, Charleston, South Carolina, March 8-12, 1999--Volume 2 of 3--Contamination of Hydrologic Systems and Related Ecosystems: U.S. Geological Survey Water-Resources Investigations Report 99-4018B, p. 455-463.

Wright, D.L., Smith, D.V., Abraham, J.D., Smith, R.T., Cui, T.J., and Chew, W.C., 1999,

New field and modeling results from a simulated waste pit using the enhanced very early time electromagnetic (VETEM) prototype system, in Powers, M.H., Cramer, L., and Bell, R.S., eds., Proceedings of the Symposium on the Application of Geophysics to Engineering and Environmental Problems (SAGEEP '99), Oakland, California, March 14-18, 1999: p. 811-820.

Abrams, R.H., Loague, K., and Kent, D.B., 1998,

Development and testing of a compartmentalized reaction network model for redox zones in contaminated aquifers: Water Resources Research, v. 34, no. 6, p. 1531-1541, 98WR00485, doi:10.1029/98WR00485.

Anderman, E.R., and Hill, M.C., 1998,

Improving ground-water flow model calibration with the advective-transport observation (ADV) package to MODFLOWP: U.S. Geological Survey Fact Sheet FS-059-98, 2 p.

Appelo, C.A.J., and Parkhurst, D.L., 1998,

Enhancements to the geochemical model PHREEQC-1D transport and reaction kinetics, in Arehart, G.B., and Hulston, J.R., eds., Proceedings of the 9th International Symposium on Water-Rock Interaction (WRI-9), Rottersam: A.A. Balkema, p. 873-876.

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. 1369-1390, doi:10.1111/j.1752-1688.1998.tb05438.x.

Bekins, B.A., Warren, E., and Godsy, E.M., 1998,

A comparison of zero-order, first-order, and Monod biotransformation models: Ground Water, v. 36, no. 2, p. 261-268.

Brown, J.G., Bassett, R.L., and Glynn, P.D., 1998,

Analysis and simulation of reactive transport of metal contaminants in ground water in Pinal Creek Basin, Arizona, in Steefel, C.I., and Van Cappellen, P., eds., Special Issue--Reactive Transport Modeling of Natural Systems: New York, Elsevier, Journal of Hydrology, v. 209, p. 225-250.

Cheng, R.T., and Smith, R.E., 1998,

A NOWCAST model for tides and tidal currents in San Francisco Bay, California, in Ocean Community Conference ‘98, Marine Technology Society, Baltimore, Maryland, November 15-19, 1998: Marine Technology Society, v. I, p. 537-543.

Choi, J., 1998,

Transport modeling of metal contaminants in a stream-aquifer system: Tucson, University of Arizona, Department of Hydrology and Water Resources, Ph.D. Dissertation, 225 p.

Choi, J., Hulseapple, S.M., Conklin, M.H., and Harvey, J.W., 1998,

Modeling CO2 degassing and pH in a stream-aquifer system, in Steefel, C.I., and Van Cappellen, P., eds., Special Issue--Reactive Transport Modeling of Natural Systems: New York, Elsevier, Journal of Hydrology, v. 209, p. 297-310.

Dillard, L.A., 1998,

Investigating the physics of dissolution of nonaqueous phase liquids--simulation from pore network to field scale: Stanford, Calif., Stanford University, Ph.D. Thesis, 178 p.

Essaid, H.L., and Bekins, B.A., 1998,

Modeling solute-transport and biodegradation with BIOMOC: U.S. Geological Survey Fact Sheet 095-98, 4 p.

Goff, K., Lewis, M.E., Person, M.A., and Konikow, L.F., 1998,

Simulated effects of irrigation on salinity in the Arkansas River Valley in Colorado: Ground Water, v. 36, no. 1, p. 76-86.

Goode, D.J., 1998,

Ground-water age and atmospheric tracers: Simulation studies and analysis of field data from the Mirror Lake site, New Hampshire: Princeton, N.J., Princeton University, Department Civil Engineering and Operations Research, Ph.D. thesis, 194 p.

Healy, R.W., and Russell, T.F., 1998,

Solutions of the advection-dispersion equation in two dimensions by a finite volume Eularian-Lagrangian localized adjoint method: Advances in Water Resources, v. 21, no. 1, p. 11-26.

Hornberger, G.Z., and Konikow, L.F., 1998,

Addition of MOC3D solute-transport model capability to the U.S. Geological Survey MODFLOW-96 graphical-user interface using Argus open numerical environments: U.S. Geological Survey Open-File Report 98-188, 30 p.

Hornecker, M.M., and Kolar, R.L., 1998,

Automated soil moisture observations and infiltration modeling at the closed Norman, Oklahoma landfill, in Morel-Seytoux, H.J., ed., 18th AGU Hydrology Days, Proceedings, Fort Collins, Colo., March 30-April 2, 1998: p. 141-152.

Kipp, K.L., Jr., Konikow, L.F., and Hornberger, G.Z., 1998,

An implicit dispersive transport algorithm for the U.S. Geological Survey MOC3D solute-transport model: U.S. Geological Survey Water-Resources Investigations Report 98-4234, 54 p.

Knowles, N., Cayan, D.R., Peterson, D.H., and Uncles, R.J., 1998,

Simulated efforts of delta out flow on the bay--1998 compared to other years: Interagency Ecological Program for the Sacramento-San Joaquin Estuary Newsletter, v. 11, no. 4, p. 29-32.

Konikow, L.F., and Reilly, T.E., 1998,

Groundwater modeling, in Delleur, J., ed., The Handbook of Groundwater Engineering: Boca Raton, CRC Press.

Konikow, L.F., and Sanford, W.E., 1998,

Reply to comment by E. Holzbecher on "Constant-concentration boundary condition--Lessons from the HYDROCOIN variable-density groundwater benchmark problem: Water Resources Research, v. 34, no. 10, p. 2775-2778.

Lahvis, M.A., and Baehr, A.L., 1998,

Simulating transport of volatile organic compounds in the unsaturated zone using the computer model R-UNSAT: U.S. Geological Survey Fact Sheet FS-019-98, 4 p.

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.

Mace, A., Rudolph, D.L., and Kachanoski, R.G., 1998,

Suitability of parametric models to describe the hydraulic properties of an unsaturated coarse sand and gravel: Ground Water, v. 36, no. 3, p. 465-475.

Mason, J.L., and Kipp., K.L., Jr., 1998,

Hydrology of the Bonneville Salt Flats, northwestern Utah, and the simulation of ground-water flow and solute transport in the shallow-brine aquifer: U.S. Geological Survey Professional Paper 1585, 108 p.

Nimmo, J.R., 1998,

Modeling structural effects on soil hydraulic properties, in Proceedings of the 16th World Congress of Soil Science, Montpellier, France, August 20-26, 1998.

Paillet, F.L., 1998,

Flow modeling and permeability estimation using borehole flow logs in heterogeneous fractured formations: Water Resources Research, v. 34, no. 5, p. 997-1010, 98WR00268, doi:10.1029/98WR00268.

Peng, W.S., Hampton, D.R., Benegar, J.J., Kambham, K.K.R., and Konikow, L.F., 1998,

Can MODFLOW-based contaminant transport models predict breakthrough?, in Proceedings of the MODFLOW-98 Conference, Golden, Colorado, October 1998: p. 363-370.

Reinfelder, J.R., Fischer, N.S., Luoma, S.N., Nichols, J.W., and Wang, W.X., 1998,

Trace element trophic transfer in aquatic organisms--A critique of the kinetic model approach: The Science of the Total Environment, v. 219, no. 2-3, p. 117-135, doi:10.1016/S0048-9697(98)00225-3.

Runkel, R.L., 1998,

One dimensional transport with inflow and storage (OTIS)--A solute transport model for streams and rivers: U.S. Geological Survey Water-Resources Investigations Report 98-4018, 73 p.

Runkel, R.L., McKnight, D.M., and Andrews, E.D., 1998,

Analysis of transient storage subject to unsteady flow--Diel flow variation in an Antarctic stream: Journal of North American Benthological Society, v. 17, no. 2, p. 143-154.

Smith, K.S., Ranville, J.F., Plumlee, G.S., and Macalady, D.L., 1998,

Predictive double-layer modeling of metal sorption in mine-drainage systems, in Jenne, E.A., ed., Adsorption of metals by geomedia--variables, mechanisms, and model applications: San Diego, Calif., Academic Press, p. 521-547.

Smith, R.L., and Garabedian, S.P., 1998,

Using transport model interpretations of tracer tests to study microbial processes in groundwater, in Koch, A.L., Robinson, J.A., and Milliken, G.A., eds., Mathematical modeling in microbial ecology: New York, Chapman and Hall, p. 94-123.

Stollenwerk, K.G., 1998,

Molybdate transport in a chemically complex aquifer--Field measurements compared with solute-transport model predictions: Water Resources Research, v. 34, no. 10, p. 2727- 2740, 98WR02163, doi:10.1029/98WR02163.

Tiedeman, C.R., Kernodle, J.M., and McAda, D.P., 1998,

Application of nonlinear regression methods to a ground-water flow model of the Albuquerque Basin, New Mexico: U.S. Geological Survey Water-Resources Investigations Report 98-4172, 90 p.

Vrabel, J., and Glynn, P.D., 1998,

PHRQCGRF - A computer program for graphical interpretation of PHREEQC geochemical transport simulations: U.S. Geological Survey Open-File Report 98-281, 30 p.

Waddill, D.W., 1998,

Three-dimensional modeling of solute transport with in situ bioremediation based on sequential electron acceptors: Blacksburg, Virginia Polytechnic Institute and State University, unpublished Ph.D. dissertation, 190 p.

Wang, P.F., Cheng, R.T., Richter, K., Gross, E.S., and Gartner, J.W., 1998,

Modeling tidal hydrodynamics of San Diego Bay, California: Journal of the American Water Resources Association, v. 34, no. 5, p. 1123-1140, doi:10.1111/j.1752-1688.1998.tb04159.x.

Zhang, H., Schwartz, F.W., Wood, W.W., Garabedian, S.P., and LeBlanc, D.R., 1998,

Simulation of variable-density flow and transport of reactive and nonreactive solutes during a tracer test at Cape Cod, Massachusetts: Water Resources Research, v. 34, no. 1, p. 67-82, 97WR02918, doi:10.1029/97WR02918.

Anderman, E.R., and Hill, M.C., 1997,

Advective-transport observation (ADV) package, a computer program for adding advective-transport observations of steady-state flow fields to the three-dimensional ground-water-flow parameter-estimation model MODFLOWP: U.S. Geological Survey Open-File Report 97-14, 67 p.

Battaglin, W.A., and Goolsby, D.A., 1997,

Statistical modeling of agricultural chemical occurrence in midwestern rivers: Journal of Hydrology, v. 196, no. 1-4, p. 1-25, doi:10.1016/S0022-1694(97)00011-5.

Bekins, B.A., Warren, E., and Godsy, E.M., 1997,

Comparing zero and first order approximations to the Monod Model, in Alleman, B.C., and Leeson, A., eds., In Situ and On Site Bioremediation--Procedings of the Fourth International Symposium on In Situ And On-Site Bioremediation, New Orleans, La., April 28-May 1, 1997: Columbus, Ohio, Battelle Press, v. 5, p. 547-552 (Contact The Conference Group Inc. for information on the availability of the proceedings.).

Brauner, J.S., and Widdowson, M.A., 1997,

Sequential electron acceptor model for evaluation of in situ bioremediation of petroleum hydrocarbon contaminants in groundwater, in Engineering Foundation Conference on Bioremediation, Palm Coast, Florida, January 21-26, 1996: Annals of the New York Academy of Sciences, v. 829, p. 399-419.

Charlton, S.R., Macklin, C.L., and Parkhurst, D.L., 1997,

PHREEQCI - A graphical user interface for the geochemical computer program PHREEQC: U.S. Geological Survey Water-Resources Investigations Report 97-4222, 9 p.

Dettinger, M.D., Peterson, D.H., Diaz, H.F., and Cayan, D.R., 1997,

Forecasting the spring runoff pulses from the Sierra Nevada: Interagency Ecosystem Program for the Sacramento-San Juaquin Estuary Newsletter, v. 10, no. 3, Summer 1997, p. 32-35.

Dillard, L.A., Essaid, H.I., and Herkelrath, W.N., 1997,

Multiphase flow modeling of a crude-oil spill site with a bimodal permeability distribution: Water Resources Research, v. 33, no. 7, p. 1617-1632, 97WR00857, doi:10.1029/97WR00857.

Duncan, J.J., 1997,

Use of MODFLOW to simulate the effects of model parameters on groundwater flowpaths near surface water bodies--Worcester, Mass.: Worcester, Mass., Worcester Polytechnic Institute, Department of Civil Engineering, unpublished M.S. thesis, variously p.

Harvey, R.W., Metge, D.W., Kinner, N., and Mayberry, N., 1997,

Physiological considerations in applying laboratory-determined buoyant densities to predictions of bacterial and protozoan transport in groundwater--Results of in-situ and laboratory tests: Environmental Science and Technology, v. 31, no. 1, p. 289-295, doi:10.1021/es960461d.

Joss, C.J., and Baehr, A.L., 1997,

Documentation of AIR2D, A computer code to simulate two-dimensional, axisymmetric air flow in the unsaturated zone: U.S. Geological Survey Open-File Report 97-588, 106 p.

Kipp, K.L., Jr., 1997,

Guide to the revised heat and solute transport simulator--HST3D, Version 2: U.S. Geological Survey Water-Resources Investigations Report 97-4157, 149 p.

Knowles, N., Cayan, D., Ingram, L., Peterson, D., and Uncles, R., 1997,

Diagnosing the flood of 1997 in San Francisco Bay with observation and model results: Interagency Ecology Newsletter (DWR), v. 10, no. 3, p. 28-31.

Konikow, L.F., Sanford, W.E., and Campbell, P.J., 1997,

Constant-concentration boundary condition--Lessons from the HYDROCOIN variable-density groundwater benchmark problem: Water Resources Research, v. 33, no. 10, p. 2253-2262.

Lahvis, M.A., and Baehr, A.L., 1997,

Documentation of R-UNSAT, A computer model for the simulation of reactive transport in the unsaturated zone: U.S. Geological Survey Open-File Report 97-630, 104 p.

Lucas, L.V., 1997,

A numerical investigation of coupled hydrodynamics and phytoplankton dynamics in shallow estuaries: Stanford, Calif., Standord University, Department of Civil and Environmental Engineering, PhD. Thesis, 314 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.

Nimmo, J.R., 1997,

Modeling structural influences on soil water retention: Soil Science Society of America Journal, v. 61, no. 3, p. 712-719.

Parkhurst, D.L., 1997,

Geochemical mole-balance modeling with uncertain data: Water Resources Research, v. 33, no. 8, p. 1957-1970, 97WR01125.

Reddy, M., and Aiken, G., 1997,

Speciation and fractionation modeling studies - dissolved organic carbon (DOC)-mercury interaction--U.S. Geological Survey Program on the South Florida Ecosystem, Proceedings of the Technical Symposium in Ft. Lauderdale, Florida, August 25-27, 1997: U.S. Geological Survey Open-File Report 97-385, 73 p.

Rubin, Y., and Ezzedine, S., 1997,

The travel times of solutes at the Cape Cod tracer experiment--Data analysis, modeling, and structural parameters inference: Water Resources Research, v. 33, no. 7, p. 1537-1547, 96WR00016, doi:10.1029/96WR00016.

Ryan, B.J., and Kipp, K.L., Jr., 1997,

Ground-water flow and contaminant transport at a radioactive-materials processing site, Wood River Junction, Rhode Island: U.S. Geological Survey Professional Paper 1571, 89 p.

Tiedeman, C.R., Goode, D.J., and Hsieh, P.A., 1997,

Numerical simulation of ground-water flow through glacial deposits and crystalline bedrock in the Mirror Lake area, Grafton County, New Hampshire: U.S. Geological Survey Professional Paper 1572, 50 p.

Waddill, D.W., and Widdowson, M.A., 1997,

SEAM3D: A numerical model for three-dimensional solute transport and sequential electron acceptor-based bioremediation in groundwater: Virginia Polytechnic Institute and State University Final Technical Report, prepared for the U.S. Army Corps of Engineers, 336-344 p.

Anderman, E.R., 1996,

The use of advective-transport observations to improve ground-water flow parameter estimation: Golden, Colorado School of Mines, Department of Geology and Geological Engineering, unpublished Ph.D. thesis, 277 p.

Anderman, E.R., Hill, M.C., and Poeter, E.P., 1996,

Two-dimensional advective transport in ground-water flow parameter estimation: Ground Water, v. 34, no. 6, p. 1001-1009.

Andraski, B.J., 1996,

Simulated trench studies near Beatty, Nevada-Initial results and implications, in Stevens, P.R., and Nicholson, T.J., eds., Joint U.S. Geological Survey, U.S. Nuclear Regulatory Commission Workshop on research related to low-level radioactive waste disposal, May 4-6, 1993, National Center, Reston, Virginia, Proceedings: U.S. Geological Survey Water-Resources Investigations Report 95-4015, p. 111-118.

Baker, R.J., and Baehr, A.L., 1996,

Use of column studies and a reactive transport model to measure biodegradation rates of hydrocarbons, 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. 43-47.

Battaglin, W.A., and Goolsby, D.A., 1996,

Using GIS and logistic regression to estimate agricultural chemical concentrations in rivers of the midwestern 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 IAHS Publication No. 235, p. 253-260.

Battaglin, W.A., and Goolsby, D.A., 1996,

Using GIS and regression to estimate annual herbicide concentrations in outflow from reservoirs in the midwestern USA, 1992-93, in AWRA Symposium on GIS and Water Resources, Ft. Lauderdale, FL, September 22-26, 1996: American Water Resources Association.

Battaglin, W.A., and Goolsby, D.A., 1996,

Using GIS and regression to estimate annual herbicide concentrations in outflow from reservoirs in the midwestern USA, 1992-93, in Hallam, C.A., Salisbury, H.M., Lanfear, K.J., and Battaglin, W.A., eds., GIS and Water Resources--Proceedings of the American Water Resources Association: American Water Resources Association Technical Publication Series TPS-96-3, p. 89-98.

Bekins, B.A., Godsy, E.M., and Goerlitz, D.F., 1996,

Modeling steady-state methanogenic degradation of phenols in ground water at Pensacola, Florida, 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. 2, p. 843-849.

Boyer, E.W., Hornberger, G.M., Bencala, K.E., and McKnight, D.M., 1996,

Overview of a simple model describing variation of dissolved organic carbon in an upland catchment: Ecological Modeling, v. 86, p. 183-188, doi:10.1016/0304-3800(95)00049-6.

Broshears, R.E., Kimball, B.A., and Runkel, R.L., 1996,

Simulation of reactive transport during a pH modification experiment in a mountain stream affected by acid mine drainage, 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. 2, p. 781-788.

Broshears, R.E., Runkel, R.L., Kimball, B.A., Bencala, K.E., and McKnight, D.M., 1996,

Reactive solute transport in an acidic stream--Experimental pH increase and simulation of controls on pH, aluminum, and iron: Environmental Science and Technology, v. 30, no. 10, p. 3016-24, doi:10.1021/es960055u.

Brown, J.G., 1996,

Movement of metal contaminants in ground water in the Pinal Creek basin, Arizona---Model assessment and simulation of reactive transport: Tucson, University of Arizona, M.S. thesis, 236 p.

Cho, H.J., Smith, J.A., and Jaffé, P.R., 1996,

Simulation of trichloroethylene volatilization in the unsaturated zone during a field infiltration experiment at Picatinny Arsenal, New Jersey, 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. 315-320.

Dillard, L.A., Essaid, H.I., and Herkelrath, W.N., 1996,

Multiphase-flow modeling of the Bemidji, Minnesota crude-oil-spill site with geostatistical simulation of hydraulic properties, 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. 2, p. 679-688.

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.

Essaid, H.I., Baedecker, M.J., and Cozzarelli, I.M., 1996,

Use of simulation to study field-scale solute transport and biodegradation at the Bemidji, Minnesota, crude-oil spill site, 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. 2, p. 621-629.

Gelhar, L.W., 1996,

Perspectives on field scale application of stochastic subsurface hydrology, in Subsurface Flow and Transport: The Stochastic Approach, Second IHP/IAHS George Kovacs Colloquium, Proceedings, Paris, France, January 26-28, 1995: Cambridge University Press/UNESCO.

Glynn, P.D., and Brown, J.G., 1996,

Reactive transport modeling of acidic metal-contaminated ground water at a site with sparse spatial information, in Lichtner, P.C., Steefel, C.I., and Oelkers, E.H., eds., Reactive Transport in Porous Media: Washington, D.C., Mineralogical Society of America, Reviews in Mineralogy, v. 34, p. 377--438.

Green, T.R., Constantz, J.E., and Freyberg, D.L., 1996,

Upscaled soil-water retention using van Genuchten's function: Journal of Hydrologic Engineering, v. 1, no. 3, p. 123-130, doi:10.1061/(ASCE)1084-0699(1996)1:3(123).

Healy, R.W., and Ronan, A.D., 1996,

Documentation of computer program VS2DH for simulation of energy transport in variably saturated porous media--modification of the U.S. Geological Survey's computer program VS2DT: U.S. Geological Survey Water-Resources Investigations Report 96-4230, 36 p.

Healy, R.W., Striegl, R.G., Russell, T.F., Hutchinson, G.L., and Livingston, G.P., 1996,

Numerical evaluation of static-chamber measurements of soil-atmospheric gas exchange--Identification of physical processes: Soil Science Society of America Journal, v. 60, no. 2, p. 740-747.

Joss, C.J., and Baehr, A.L., 1996,

A multispecies transport model to simulate vapor extraction and bioventing remediation of unsaturated zones contaminated with gasoline, 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. 61-63.

Kohler, M., Curtis, G.P., Kent, D.B., and Davis, J.A., 1996,

Experimental investigation and modeling of uranium (VI) transport under variable chemical conditions: Water Resources Research, v. 32, no. 12, p. 3539-3551, 96WR02815, doi:10.1029/95WR02815.

Konikow, L.F., 1996,

Numerical models of groundwater flow and transport, in Manual on Mathematical Models in Isotope Hydrogeology: Vienna, Austria, International Atomic Energy Agency IAEA-TECDOC-910, p. 59-112.

Konikow, L.F., Campbell, P.J., and Sanford, W.E., 1996,

Modeling brine transport in a porous medium--A reevaluation of the HYDROCOIN level 1, case 5 problem, in Kovan, K., and Van den Heijde, P., eds., Calibration and Reliability in Groundwater Modeling [proceedings]: IAHS Publication No. 237, p. 363-372.

Konikow, L.F., Goode, D.J., and Hornberger, G.Z., 1996,

A three-dimensional method-of-characteristics solute-transport model (MOC3D): U.S. Geological Survey Water-Resources Investigations Report 96-4267, 87 p.

Lahvis, M.A., and Baehr, A.L., 1996,

Estimation of rates of aerobic hydrocarbon biodegradation by simulation of gas transport in the unsaturated zone: Water Resources Research, v. 32, no. 7, p. 2231-2249, 96WR00805, doi:10.1029/96WR00805.

LeBlanc, D.R., and Celia, M.A., 1996,

Numerical simulation of downward movement of solutes during a natural-gradient tracer test in sand and gravel, Cape Cod, Massachusetts, 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. 283-287.

Liu, S., Yen, S., and Kolpin, D.W., 1996,

Atrazine concentrations in near-surface aquifers--A censored regression approach: Journal of Environmental Quality, v. 25, no. 5, p. 992-999.

Martin, M., 1996,

Simulation of transport, desorption, volatilization, and microbial degradation of trichloroethylene in ground water at Picatinny Arsenal, New Jersey, 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. 307-313.

Masterson, J.P., and Walter, D.A., 1996,

Effects of changes in aquifer properties on simulated fluid-particle pathlines, Cape Cod, Massachusetts, 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. 289-296.

Masterson, J.P., Walter, D.A., and Savoie, J., 1996,

Use of particle tracking to improve numerical model calibration and to analyze ground-water flow and contaminant migration, Massachusetts Military Reservation, Cape Cod, Massachusetts: U.S. Geological Survey Water-Supply Paper 2482, 50 p.

Naftz, D.L., 1996,

Using Geochemical and Statistical Tools to Identify Irrigated Areas that Might Contain High Selenium Concentrations in Surface Water: U.S. Geological Survey Fact Sheet FS-O77-96, 4 p.

Navoy, A.S., 1996,

Use of flowpath simulation to determine contributing areas and traveltimes of nonpoint-source ground-water contamination, Gloucester County, New Jersey, 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. 2, p. 1011-1019.

Nordstrom, D.K., 1996,

Trace metal speciation in natural waters--Computational vs. analytical: Water, Air, and Soil Pollution, v. 90, p. 257-267.

Paillet, F.L., and Barton, C.A., 1996,

The synthetic roadcut--A numerical technique for the multiple-scale integration of surface and borehole data, in Symposium on Application of Geophysics to Environmental and Engineering Problems, Keystone, Colorado, April 28-May 2, 1996: Englewood, Colo., Engineering and Environmental Geophysics Society, p. 823-83.

Peterson, D.H., Cayan, D.R., Dettinger, M.D., Noble, M., Riddle, L.G., Schemel, L.E., Smith, R.E., Uncles, R.J., and Walters, R., 1996,

San Francisco Bay salinity--Observations, numerical simulation, and statistical models, in Hollibaugh, J.T., ed., San Francisco Bay--The ecosystem: San Francisco, American Association for the Advancement of Science, Pacific Division, p. 9-34.

Rossi, C., and Nimmo, J.R., 1996,

Modelli modificati di curve di ritenzione idrica in mezzi porosi non saturi: Quaderni di Geologia Applicata, v. 3, p. 127-136.

Runkel, R.L., Bencala, K.E., and Broshears, R.E., 1996,

An equilibrium-based simulation model for reactive solute transport in small streams, 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. 2, p. 775-780.

Runkel, R.L., Bencala, K.E., Broshears, R.E., and Chapra, S.C., 1996,

Reactive solute transport in streams--1, Development of an equilibrium-based model: Water Resources Research, v. 32, no. 2, p. 409-418, 95WR03106, doi:10.1029/95WR03106.

Runkel, R.L., McKnight, D.M., Bencala, K.E., and Chapra, S.C., 1996,

Reactive solute transport in streams--2, Simulation of a pH modification experiment: Water Resources Research, v. 32, no. 2, p. 419-430, 95WR03107, doi:10.1029/95WR03107.

Shapiro, A.M., Wood, W.W., Busenberg, E., Drenkard, S., Plummer, L.N., Torgersen, T., and Schlosser, P., 1996,

A conceptual model for estimating regional ground-water velocity in bedrock of the Mirror Lake area, Grafton County, New Hampshire, 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. 171-177.

Squillace, P.J., 1996,

Observed and simulated movement of bank-storage water: Ground Water, v. 34, no. 1, p. 121-134.

Squillace, P.J., and Pollock, D.W., 1996,

Comparison of simulated and observed movement of bank-storage water adjacent to the Cedar River, Iowa, 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. 525-534.

Stackelberg, P.E., and Eckhardt, D.A.V., 1996,

Modeling statistical relations among shallow ground-water quality, human activities, land use, and thickness of the unsaturated zone on Long Island, New York, 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. 2, p. 993-1000.

Stollenwerk, K.G., 1996,

Simulation of phosphate transport in sewage-contaminated groundwater, Cape Cod, Massachusetts: Applied Geochemistry, v. 11, no. 1-2, p. 317-324, doi:10.1016/0883-2927(95)00041-0.

Stollenwerk, K.G., 1996,

Simulation of reactions affecting transport of constituents in the acidic plume, Pinal Creek Basin, Arizona, in Brown, J.G., and Favor, B., eds., Hydrology and geochemistry of aquifer and stream contamination related to acidic water in Pinal Creek Basin near Globe, Arizona: U.S. Geological Survey Water-Supply Paper 2466, p. 21-50.

Uncles, R.J., and Peterson, D.H., 1996,

Modeling the long-term salinity field in San Francisco Bay: Continental Shelf Research, v. 16, p. 2005-2039.

Voronin, L.M., and Rice, D.E., 1996,

Hydrogeology and simulation of ground-water flow, Picatinny Arsenal and vicinity, Morris County, New Jersey: U.S. Geological Survey Water-Resources Investigations Report 96-4061, 64 p.

Wagner, B.J., and Harvey, J.W., 1996,

Solute-transport parameter estimation for an injection experiment at Pinal Creek, Arizona, 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. 2, p. 1081-1087.

Warren, E., and Godsy, E.M., 1996,

Modeling breakthrough of nitrogen heterocyclic compounds in laboratory columns containing creosote-contaminated aquifer material, in Morganwalp, D.W., and Aronson, D.A., eds., U.S. Geological Survey Toxic Substances Hydrology Program--Proceedings