Dr. Bridget R. Scanlon

Dr. Bridget R. Scanlon
Senior Research Scientist
Bureau of Economic Geology
The University of Texas at Austin
University Station, Box X
Austin, Texas 78713-8924
Telephone
512-471-8241
Fax
512-471-0140

Sustainable Water Resources Program

The primary objective of the Sustainable Water Resources Program is to assess sustainability issues with respect to water resources within the context of climate variability and land use/land cover change. Water resources include water quantity and water quality. Studies include physical, chemical, and isotopic analyses and numerical modeling. Much of our research focuses on groundwater recharge in desert basins and the impacts of climate variability and change and land use/land cover change on recharge. Impacts of natural and anthropogenic sources of contamination on water quality are also addressed in many of our research studies. Our program is funded by federal sources including EPA and DOE and state sources including Texas Commission on Environmental Quality and Texas Water Development Board in addition to support from the Jackson School of Geosciences. 

The Sustainable Water Resources Program is led by Bridget Scanlon and includes research scientists, postdoctoral fellows, and graduate research assistants working on different topics. Topics include estimation of groundwater recharge in semiarid and arid regions using field studies; evaluating impacts of climate variability (ENSO) on recharge, monitoring ecohydrologic controls on the water balance using remote and groundbased measurements, monitoring soil moisture, evaluating controls on groundwater arsenic contamination; and source attribution and processes affecting nutrients, particularly nitrate.

Center for Sustainable Water Resources

  • Education

    B.S. Geology, Trinity College, Dublin, Ireland, 1980
    M.S. Geology, University of Alabama, 1983
    Ph.D. Geology, University of Kentucky, 1985

  • Areas of Expertise

    Evaluation of the impact of climate variability and land use change on groundwater resources.

    Application of numerical models for simulating variably saturated flow and transport.

    Assessment of natural and anthropogenic contamination of aquifers, including arsenic and nitrate.

  • Professional Work Experience

    Present Position: Senior Research Scientist, Bureau of Economic Geology, The University of Texas at Austin (October 1999 - Present).
    Impacts of climate variability/change on precipitation (ENSO, PDO etc) and water resources. Assessment of paleoclimate impacts on groundwater recharge in semiarid and arid regions. Evaluation of land-use change impacts on groundwater resources. Quantification of groundwater recharge using soil physics, environmental tracers, and numerical simulations. Evaluation of arsenic contamination related to anthropogenic and geogenic sources. Unsaturated zone nitrate profiling to link land surface processes with groundwater contamination. Monitoring and modeling analyses of evapotranspiration covers for waste containment. 

    Present Position:  Adjunct Appointment to the Graduate Faculty, School of Natural Sciences, University of Nebraska, Lincoln (2004 - Present).
    Supervisor of graduate students.

    Research Scientist, Bureau of Economic Geology, The University of Texas at Austin (September 1991 - October 1999).
    Characterization of fluid flow and solute transport in arid and semiarid systems using soil physics and environmental and isotopic tracers. Numerical simulation of liquid and vapor transport in unsaturated systems. Examination of focused recharge and preferential flow in unsaturated media.

    Research Associate, Bureau of Economic Geology, The University of Texas at Austin (July 1987 - August 1991).
    Characterization of hydraulic and chemical attributes of the unsaturated zone; use of radioisotopic tracers to estimate groundwater recharge in desert soils; numerical simulations of liquid flow related to the INTRAVAL (International Validation of Flow and Transport) program.

    Hydrogeologist, S. S. Papadopoulos and Associates (February 1986 - February 1987).
    Hydrologic characterization of a Superfund site including monitoring well installation and ground-water sampling for organics; numerical modeling of groundwater flow and transport related to water resources evaluation.

  • Professional Societies

    American Geophysical Union (Fellow)

    Geological Society of America (Fellow)

    International Association of Hydrogeologists

  • Professional Registrations

    State of Texas Board of Professional Geoscientists, License No. 1645

    State of Mississippi Board of Professional Geoscientists, License No. 1723

  • Awards and Honorary Societies

    American Geophysical Union, Fellow, Class of 2014  

    Publication Award, Bureau of Economic Geology (exemplary publication of scientific or economic impact), 2009

    Joseph C. Walter Jr. Excellence Award, Jackson School of Geosciences, 2008

    Geological Society of America Birdsall-Dreiss Distinguished Lecturer, 2007

    Conservation Award, Barton Springs Edwards Aquifer Conservation District, 2000, 2004

    George F. Pirtle Award, Department of Geology, University of Kentucky, 1984

    Mining and Mineral Resources Research Fellowship, University of Alabama, 1982–1983

    Friends of International Students Award, University of Alabama, 1982–1983

    P.E. LaMoreaux and Associates Scholarship, University of Alabama, 1982

  • Committee Responsibilities and Professional Activities

    National Academy of Sciences Committees: 

    Member, Committee on Spatial Data Enabling USGS Strategic Science in the 21st Century, 2009–2010

    Member, Committee on Integrated Observations on Hydrologic and Related Sciences, 2005–2007

    Member, Fluxes across Interfaces, 2002

    Member, Subsurface Contamination at DOE Complex Sites: Research Needs and Opportunities, 1998–1999

    Member, Evaluation of Unsaturated Flow at the proposed low-level radioactive waste disposal site at Ward Valley, California, 1994–1995

    National Science Foundation Committees: 

    Member, EPSCOR Review Team, University of New Mexico, 2009 – 2010.

    Member, Science Planning Team for Consortium of Universities for Advancement of Hydrologic Sciences (CUAHSI), 2005–2006

    Member, Ecohydrology Vision Workshop, Albuquerque, NM, 2004

    Member, Joint DOE/NSF Workshop: Water: Challenges at the Intersection of Human and Natural Systems, Pacific Northwest National Laboratory, 2004

    Member, CUAHSI Neuse Prototype Long-Term Hydrologic Observatory (LTHO) Design Team, 2003–2004

    Co-Leader, Development of a Proposal for a CUAHSI Hydrologic Observatory in Texas, 2004–2005

    Other National/International Committees:

    Member, GRACE Science Team, NASA, 2009–2012

    Member, International Association of Hydrogeologists, Commission on Groundwater and Climate Change, 2011–present

    Member, Ecohydrology Committee, American Geophysical Union, 2011–present

    Member, Review Committee, Global Estimation of Groundwater Recharge for WHYMAP, Intl. Atomic Energy Agency, Vienna, 2004–2005

    Chair, Fall Program Committee for Hydrology, American Geophysical Union, 2005, 2006

    Member, Long-Term Stewardship, Department of Energy, 2001–2002

    Member, Unsaturated Zone Committee, American Geophysical Union, 1997–present

    Member, Committee to Develop DOE Complex-Wide Vadose Zone Science and Technology Roadmap, Department of Energy, 2000

    Technical Reviewer, Evaluation of Recharge Issues at the Hanford Site, Department of Energy, 1999

    Technical Reviewer, Analysis of 36Cl Results from the High-Level Nuclear Waste Site at Yucca Mountain, Department of Energy, 1997–1998

    Member, Committee for Hydrogeology and Environmental Geology, SEPM (Society for Sedimentary Geologists), 1996–1999

    Technical Reviewer, Analysis of Preferential Flow at Yucca Mountain, Nuclear Waste Technical Review Board, 1995

    Technical Reviewer, Evaluation of Recharge Issues at the Hanford Site, Department of Energy, 1995

    Member, INTRAVAL (International Validation of Flow and Transport Modeling), Program Committee, 1990

    Member, Short Course Committee, Geological Society of America, 1990

    Regional Committees:

    Co-chair, Texas Groundwater Protection Committee, Research Subcommittee, Texas Commission on Environmental Quality, 2002-present

    Member, Texas Groundwater Protection Committee, Texas Commission on Environmental Quality, 2002–present

    Member, Surface water groundwater interaction, LCRA/SAWS, 2002

    Member, Technical Advisory Group for Water Availability Modeling, Texas Water Development Board, 2001

    Member, Technical Advisory Group on Groundwater Modeling and Contaminant Transport, Pantex, U.S. Department of Energy, 2000–2002

    Member, Promotions Advisory Committee, Bureau of Economic Geology, 2002–2004

    Editorial Positions

    Associate Editor, Environmental Research Letters, 2012–present

    Associate Editor, Water Resources Research, 2011–present

    Managing Editor, Hydrogeology Journal, 2005–2007

    Associate Editor, Vadose Zone Journal, 2001–2007

    Associate Editor, Hydrogeology Journal, 2000–2003

    Associate Editor, American Geophysical Union, Reviews of Geophysics, 1997–2000

    Associate Editor, Groundwater, Association of Ground Water Scientists and Engineers, 1995–1998

    Symposium, Theme Session, or Session Developer/ Co Chair

    Agroecosystems and Water Resources, American Geophysical Union Annual Meeting, San Francisco, 2010

    Impacts of Land Use and Climate Change on Water Resources Sustainability, Geological Society of America Annual Meeting, 2010

    Ecohydrology within the Context of Global Change, American Geophysical Union Annual Meeting, San Francisco, 2009

    Groundwater Sustainability and Global Change, American Geophysical Union Annual Meeting, San Francisco, 2009

    Impacts of Land Use/Land Cover Change and Climate Variability on Water Resources, American Geophysical Union Annual Meeting, San Francisco, 2006

    Impacts of Land Use/Land Cover Change on the Water Cycle, American Geophysical Union

    Annual Meeting, San Francisco, 2005

    Sustainable Management of Water Resources, Geological Society of America, Annual Meeting, Denver, 2004

    Assessing the Impacts of Vegetation on the Water Balance, American Geophysical Union Annual Meeting, San Francisco, 2003

    Measurement Techniques and Modeling of Spatial and Temporal Variability in Groundwater: Recharge in Response to Past, Present, and Future Climates, Geological Society of America Annual Meeting, 1999

    Monitoring and Modeling of the Performance of Engineered Covers for Waste Isolation, American Geophysical Union Annual Meeting, San Francisco, 1998

    Recent Advances in Tracers in Vadose Zone Hydrology, European Geophysical Union Annual Meeting, Nice, France, 1998

    Use of Noninvasive Techniques for Evaluating Parameters in Unsaturated Systems, American Geophysical Union Annual Meeting, San Francisco, 1997

    Unsaturated Zone Hydrology, Geological Society of America Annual Meeting, 1996

    The Role of Preferential Flow in the Unsaturated Zone, Geological Society of America Annual Meeting, Denver, 1996

    Integration of Hydraulic and Geochemical Approaches in Vadose Zone Studies, Geological Society of America Annual Meeting, 1994

    Methods Applied to Evaluation of Recharge Rates at Low-Level and High-Level Radioactive Waste Disposal Facilities at Workshop on Chloride and 36Cl Studies in the Arid Southwest, Las Vegas, 1993

    Quantitative Hydrogeology, Geological Society of America Annual Meeting, Boston, 1993

    Convenor, Review Committee, and Field-Trip Leader, Evaluation of Unsaturated Zone Hydrology Research at the Bureau and Specifically the Work Related to Low-Level Radioactive Waste Disposal at Eagle Flat, Texas, 1992

    Hydrogeology of Arid Regions, Geological Society of America Annual Meeting, Dallas, 1990

  • Publications

    Scanlon, B. R., S. Ikonnikova, Q. Yang, and R. C. Reedy (2020), Will water issues constrain oil and gas production in the U.S.?, Env. Sci. & Technol., https://pubs.acs.org/doi/10.1021/acs.est.9b06390.

    Scanlon, B. R., R. C. Reedy, P. E. Xu, M., J. P. Nicot, D. Yoxtheimer, Q. Yang, and S. Ikonnikova (2020), Can we beneficially reuse produced water from oil and gas extraction in the U.S.?, Science of the Total Environment, https://doi.org/10.1016/j.scitotenv.2020.137085

    Lemons, C. R., G. McDaid, K. M. Smye, J. P. Acevedo, P. H. Hennings, D. A. Banerji, and B. R. Scanlon (2019), Spatiotemporal and stratigraphic trends in salt-water disposal practices of the Permian Basin, Texas and New Mexico, United States, Environmental Geosciences, 26(4), 107-124. https://doi.org/10.1306/eg.06201919002

    Yang, Q., and B. R. Scanlon (2019), How much water can be captured from flood flows to store in depleted aquifers for mitigating floods and droughts? A case study from Texas, US, Environmental Research Letters, 14(5), https://iopscience.iop.org/article/10.1088/1748-9326/ab148e.

    Hamlin, H. S., B. R. Scanlon, R. C. Reedy, D. Banerji, S. C. Young, M. Jigmond, and J. H. Harding (2018), Fresh, Brackish, and Saline Groundwater Resources in the Carrizo-Wilcox, Queen City and Sparta Aquifers in Groundwater Management Area 13 – Location, Quantification, Producibility, and Impacts: Bureau of Economic Geology, Contract Report prepared for Texas Water Development Board, 392 p.

    Banerji, D. A., H. S. Hamlin, B. R. Scanlon, R. C. Reedy, S. C. Young, M. Jigmond, and J. H. Harding (201), Fresh, Brackish, and Saline Groundwater Resources in the Carrizo-Wilcox, Queen City and Sparta Aquifers in Groundwater Management Area 13 – Location, Quantification, Producibility, and Impacts: Bureau of Economic Geology, Contract Report prepared for Texas Water Development Board, 309p. http://www.twdb.texas.gov/publications/reports/contracted_reports/doc/1548301855.pdf

    Rodriguez, R. D., B. R. Scanlon, C. W. King, F. V. Scarpare, A. C. Xavier, and F. F. Pruski (2018), Biofuel-water-land nexus in the last agricultural frontier region of the Brazilian Cerrado, Applied Energy, 231, 1330-1345.

    Scanlon, B. R., et al. (2018), Global models underestimate large decadal declining and rising water storage trends relative to GRACE satellite data, Proceedings of the National Academy of Sciences of the United States of America, 115(6), E1080-E1089. https://www.pnas.org/content/115/6/E1080

    Arciniega-Esparza, S., J. A. Brena-Naranjo, A. Hernandez-Espriu, A. Pedrozo-Acuna, B. R. Scanlon, J. P. Nicot, M. H. Young, B. D. Wolaver, and V. H. Alcocer-Yamanaka (2017), Baseflow recession analysis in a large shale play: Climate variability and anthropogenic alterations mask effects of hydraulic fracturing, Journal of Hydrology, 553, 160-171.

    Ikonnikova, S. A., F. Male, B. R. Scanlon, R. C. Reedy, and G. McDaid (2017), Projecting the water footprint associated with shale resource production: Eagle Ford Shale case study, Environmental Science & Technology, 51(24), 14453-14461. https://pubs.acs.org/doi/abs/10.1021/acs.est.7b03150

    Scanlon, B. R., R. C. Reedy, F. Male, and M. Walsh (2017), Water issues related to transitioning from conventional to unconventional oil production in the Permian Basin, Environmental Science & Technology, 51(18), 10903-10912. https://pubs.acs.org/doi/10.1021/acs.est.7b02185

    Scanlon, B. R., B. Ruddell, P. M. Reedy, R. I. Hook, C. Zheng, V. C. Tidwell, and S. Siebert (2017), The food-energy-water nexus: Transforming science for society, Water Resour. Res., 53,, doi:10.1002/2017WR020889. https://agupubs.onlinelibrary.wiley.com/doi/10.1002/2017WR020889

    Yeh, S., A. Ghandi, B. R. Scanlon, A. R. Brandt, H. Cai, M. Q. Wang, K. Vafi, and R. C. Reedy (2017), Energy Intensity and Greenhouse Gas Emissions from Oil Production in the Eagle Ford Shale, Energy & Fuels, 31(2), 1440-1449. https://pubs.acs.org/doi/abs/10.1021/acs.energyfuels.6b02916

    Scanlon, B. R., R. C. Reedy, F. Male, and M. Hove (2016), Managing the Increasing Water Footprint of Hydraulic Fracturing in the Bakken Play, United States, Environmental Science & Technology, 50(18), 10273-10281. https://pubs.acs.org/doi/full/10.1021/acs.est.6b01375

    Scarpare, F. V., T. A. D. Hernandes, S. T. Ruiz-Correa, M. C. A. Picoli, B. R. Scanlon, M. F. Chagas, D. G. Duft, and T. D. Cardoso (2016), Sugarcane land use and water resources assessment in the expansion area in Brazil, Journal of Cleaner Production, 133, 1318-1327. https://www.sciencedirect.com/science/article/pii/S095965261630751X

    Tiedeman, K., S. Yeh, B. R. Scanlon, J. Teter, and G. S. Mishra (2016), Recent Trends in Water Use and Production for California Oil Production, Environmental Science & Technology, 50(14), 7904-7912. https://pubs.acs.org/doi/abs/10.1021/acs.est.6b01240

    Scanlon, B. R., R. C. Reedy, and J. P. Nicot (2015), Response to Comment on "Comparison of Water Use for Hydraulic Fracturing for Unconventional Oil and Gas versus Conventional Oil", Environmental Science & Technology, 49(10), 6360-6361.

    Schwartz, R. C., R. L. Baumhardt, B. R. Scanlon, J. M. Bell, R. G. Davis, N. Ibragimov, O. R. Jones, and R. C. Reedy (2015), Long-Term Changes in Soil Organic Carbon and Nitrogen under Semiarid Tillage and Cropping Practices, Soil Science Society of America Journal, 79(6), 1771-1781.

    Scanlon, B. R., Reedy, R. C., and Nicot, J. -P., 2014,Will water scarcity in semiarid regions limit hydraulic fracturing of shale plays? Environ. Res. Lett. 9, 124011.

    Scanlon, B. R., Reedy, R. C., and Nicot, J. -P., 2014, Comparison of water use for hydraulic fracturing for shale oil and gas production versus conventional oil: Environmental Science & Technology, v. 48, no.20, p. 12386-12393

    Long, D., Longuevergne, L., and Scanlon, B. R., 2014, Uncertainty in evapotranspiration from land surface modeling, remote sensing, and GRACE satellites: Water Resources Research, v. 50, no. 2, p. 1131-1151, doi: 10.1002/2013WR014581.

    Nicot, J. -P., Scanlon, B. R., Reedy, R. C., and Costley, R., 2014, Source and fate of hydraulic fracturing water in the Barnett Shale: a historical perspective: Environmental Science & Technology, v. 48, no. 4, p. 2464-2471, doi: 10.1021/es404050r.

    Wolaver, B. D., Cook, C. E., Sunding, D. L., Hamilton, S. F., Scanlon, B. R., Young, M. H., Xu, X., and Reedy, R. C., 2014, Potential economic impacts of environmental flows following a possible listing of endangered Texas freshwater mussels: JAWRA: Journal of the American Water Resources Association, v. 50, no. 5, p. 1081-1101.

    Yang, Changbing, Mickler, P., Reedy, R. C., Scanlon, B. R., Romanak, Katherine, Nicot, J. -P., Hovorka, S. D., Treviño, R. H., and Larson, T., 2013, Single-well push–pull test for assessing potential impacts of CO2 leakage on groundwater quality in a shallow Gulf Coast aquifer in Cranfield, Mississippi: International Journal of Greenhouse Gas Control, v. 18, p. 375-387.

    Xu, X., Liu, W., Scanlon, B. R., Zhang, L., Zhang, L., and Pan, M., 2013, Local and global factors controlling water-energy balances within the Budyko framework: Geophysical Research Letters, v. 40, p. 6123-6129, doi: 10.1002/2013GL058324.

    Longuevergne, Laurent, Wilson, C. R., Scanlon, B. R., and Crétaux, J. F., 2013, GRACE water storage estimates for the Middle East and other regions with significant reservoir and lake storage: Hydrology and Earth System Sciences, v. 17, p. 4817-4830, doi: 10.5194/hess-17-4817-2013.

    Scanlon, B. R., Reedy, R. C., Duncan, I. J., Mullican, W. F., III, and Young, M., 2013, Controls on water use for thermoelectric generation: Case study Texas, U.S.: Environmental Science & Technology, v. 47, 11326-11334, doi: 10.1021/es4029183.

    Scanlon, B. R., Duncan, I. J., and Reedy, Robert, 2013, Drought and the water–energy nexus in Texas: Environmental Research Letters, v. 8, no. 4, doi:10.1088/1748-9326/8/4/045033.

    Shen, Y., Zhang, Y., Scanlon, B. R., Lei, H., Yang, D., and Yang, F., 2013, Energy/water budgets and productivity of the typical croplands irrigated with groundwater and surface water in the North China Plain: Agricultural and Forest Meteorology, v. 181, p. 133-142. 

    Taylor, R. G., Scanlon, B. R., Döll, P., Rodell, M., van Beek, R., Wada, Y., Longuevergne, Laurent, LeBlanc, M., Famiglietti, J., and Edmunds, M., 2013, Ground water and climate change: Nature Climate Change, v. 3, p. 322-330, doi: http://dx.doi.org/10.1038/nclimate1744.

    Cao, G., Zheng, C., Scanlon, B. R., Liu, J., and Li, W. 2013, Use of flow modeling to assess sustainability of groundwater resources in the North China Plain: Water Resources Research, v. 49, p. 159-175, doi:10.1029/2012WR011899.

    Xu, X., Scanlon, B. R., Schilling, K., and Sun, A. Y., 2013, Relative importance of climate and land surface changes on hydrologic changes in the US Midwest since the 1930s: Implications for biofuel production: Journal of Hydrology, v. 497, p. 110–120.

    Mickler, P., Yang, Changbing, Scanlon, B. R., Reedy, R. C., and Lu, Jiemin, 2013, Potential impacts of CO2 leakage on groundwater chemistry from laboratory batch experiments and field push-pull tests: Environmental Science & Technology, v. 47, p. 10694-10702, doi: 10.1021/es401455j.

    Crosbie, R. S., Scanlon, B. R., Mpelasoka, F. S., Reedy, R. C., Gates, J. B., and Zhang, L., 2013, Potential climate change effects on groundwater recharge in the High Plains Aquifer, USA: Water Resources Research, v. 49, p. 1–16.

    Long, D., Scanlon, B. R., Longuevergne, L., Sun, A. Y., Fernando, D. N., and Save, H., 2013, GRACE satellite monitoring of large depletion in water storage in response to the 2011 drought in Texas: Geophysical Research Letters, v. 40, p. 3395–3401.

    Döll, P., Hoffmann-Dobrev, H., Portmann, F. T., Siebert, S., Eicker, A., Rodell, M., Strassberg, G., and Scanlon, B. R., 2012, Impact of water withdrawals from groundwater and surface water on continental water storage variations: Journal of Geodynamics, v. 59‒60, p. 143‒156.

    Huang, Y., Scanlon, B. R., Nicot, J. -P., Reedy, R. C., Dutton, A. R., Kelley, V. A., and Deeds, N. E., 2012, Sources of groundwater pumpage in a layered aquifer system in the Upper Gulf Coastal Plain, USA: Hydrology Journal, v. 20, p. 783‒796.

    Long, D., Scanlon, B. R., Fernando, D. N., Meng, L., and Quiring, S. M., 2012, Are temperature and precipitation extremes increasing over the U.S. High Plains? Earth Interactions, v. 16, p. 1‒20.

    Long, D., Singh, V. P., and Scanlon, B. R., 2012, Deriving theoretical boundaries to address scale dependencies of triangle methods for evapotranspiration estimation: Journal of Geophysical Research, v. 117, D05113, doi:10.1029/2011JD017079.

    Mukherjee, A., Scanlon, B. R., Fryar, A. E., Saha, D., Ghosh, A., Chowdhuri, S., and Mishra, R., 2012, Solute chemistry and arsenic fate in aquifers between the Himalayan foothills and Indian craton (including central Gangetic plain): influence of geology and geomorphology: Geochimica et Cosmochimica Acta, v. 90, p. 283–302, dx.doi.org/10.1016/j.gca.2012.05.015.

    Nicot, J. -P., and Scanlon, B. R., 2012, Water use for shale-gas production in Texas, U.S.: Environmental Science and Technology, v. 46, p. 3580‒3586.

    Scanlon, B. R., Faunt, C. C., Longuevergne, Laurent, Reedy, R. C., Alley, W. M., McGuire, V. L., and McMahon, P. B., 2012, Groundwater depletion and sustainability of irrigation in the U.S. High Plains and Central Valley, in Proceedings of the National Academy of Sciences of the United States of America, v. 109, no. 24, p. 9320‒9325.

    Scanlon, B. R., Longuevergne, L., and Long, D., 2012, Ground referencing GRACE satellite estimates of groundwater storage changes in the California Central Valley, USA: Water Resources Research, v. 48, doi:10.1029/2011WR011312.

    Wilson, C. R., Scanlon, B. R., Sharp, J., Longuevergne, L., and Wu, H., 2012, Field test of the superconducting gravimeter as a hydrologic sensor: Ground Water, v. 50, no. 3, p. 442‒449.

    Xie, H., Longuevergne, L., Ringler, C., and Scanlon, B. R., 2012, Calibration and evaluation of a semi-distributed watershed model of Sub-Saharan Africa using GRACE data: Hydrology and Earth Systems Sciences, v. 16, p. 3083‒3099.

    Gates, J. B., Scanlon, B. R., Mu, X. M., and Zhang, L., 2011, Impacts of soil conservation on groundwater recharge in the semi-arid Loess Plateau, China, Hydrogeology Journal, v. 19, no. 4, p. 865–875.

    Kurtzman, D., and Scanlon, B. R., 2011, Groundwater recharge through vertisols: irrigated cropland vs. natural land, Israel: Vadose Zone Journal, v. 10, no. 2, p. 662–674.

    Longuevergne, Laurent, and Scanlon, B. R., 2011, Ground referencing GRACE satellite estimates of groundwater storage changes in the California Central Valley, U.S., Water Resources Research, v. 47.

    Mukherjee, A., Fryar, A. E., Scanlon, B. R., Bhattacharya, P., and Bhattacharya, A., 2011, Elevated arsenic in deeper groundwater of the western Bengal basin, India: extent and controls from regional to local scale: Applied Geochemistry, v. 26, no. 4, p. 600–613.

    Chen, J. L., Wilson, C. R., Tapley, B. D., Longuevergne, L., Yang, Z. L., and Scanlon, B. R., 2010, Recent La Plata basin drought conditions observed by satellite gravimetry: Journal of Geophysical Research, v. 115, D22108, doi:10.1029/2010JD014689, 12 p.

    Longuevergne, L., Scanlon, B. R., and Wilson, C. R., 2010, GRACE hydrological estimates for small basins: evaluating processing approaches on the High Plains aquifer, USA: Water Resources Research, v. 46, W11517, doi:10.29/2009WR008564, 15 p.

    Ng, G. C., McLaughlin, D., Entekhabi, D., and Scanlon, B. R., 2010, Probabilistic analysis of the effects of climate change on groundwater recharge: Water Resources Research, v. 46, W07502, doi:10.1029/2009WR007904.

    Scanlon, B. R., Gates, John, Reedy, R. C., Jackson, W. A., and Bordovsky, J. P., 2010, Effects of irrigated agroecosystems: 2. Quality of soil water and groundwater in the southern High Plains, Texas: Water Resources Research, v. 46, W09538, doi:10.1029/2009WR008428.

    Scanlon, B. R., Mukherjee, A., Gates, J., Reedy, R. C., and Sinha, A. K., 2010, Groundwater recharge in natural dune systems and agricultural ecosystems in the Thar Desert Region, Rajasthan, India: Hydrogeology Journal, v. 18, no. 4, p. 959–972.

    Scanlon, B. R., Reedy, R. C., and Gates, J. B., 2010, Effects of irrigated agroecosystems: 1. Quantity of soil water and groundwater in the southern High Plains, Texas: Water Resources Research, v. 46, W09537, doi:10/1029/2009WR008427.

    Scanlon, B. R., Reedy, R. C., Gates, J. B., Gowda, P., and Marek, T. H., 2010, Impact of agroecosystems on groundwater resources in the central High Plains, USA: Agriculture, Ecosystems, & Environment, v. 139, p. 700–713.

    Cey, B. D., Hudson, G. B., Moran, J. E., and Scanlon, B. R., 2009, Evaluation of noble gas recharge temperatures in a shallow unconfined aquifer: Ground Water, v. 47, no. 5, p. 646–659.

    Bronson, K. F., Malapati, A., Booker, J. D., Scanlon, B. R., Hudnall, W. H., and Schubert, A. M., 2009, Residual soil nitrate in irrigated Southern High Plains cotton fields and Ogallala groundwater nitrate: Journal of Soil and Water Conservation, v. 64, p. 98–104, DOI 10.2489/jswc.64.2.98.

    Scanlon, B. R., Nicot, J. -P., Reedy, R. C., Kurtzman, D., Mukherjee, A., and Nordstrom, D. K., 2009, Elevated naturally occurring arsenic in a semiarid oxidizing system: Southern High Plains aquifer, Texas, USA: Applied Geochemistry, v. 24, no. 11, p. 2061–2071.

    Scanlon, B. R., Stonestrom, D. A., Reedy, R. C., Leaney, F. W., Gates, John, and Cresswell, R. G., 2009, Inventories and mobilization of unsaturated zone sulfate, fluoride, and chloride related to land use change in semiarid regions, southwestern United States and Australia: Water Resources Research, v. 45, DOI 

    Stonestrom, D. A., Scanlon, B. R., and Zhang, L., 2009, Introduction to special section on impacts of land use change on water resources: Water Resources Research, v. 45, W00A00, doi:10.1029/2009WR007937.

    Strassberg, G., Scanlon, B. R., and Chambers, D., 2009, Evaluation of groundwater storage monitoring with the GRACE satellite: case study of the High Plains aquifer, central United States: Water Resources Research, v. 45, W05410, doi:10.1029/2008WR006892.

    Cey, B. D., Hudson, G. B., Moran, J. E., and Scanlon, B. R., 2008, Impact of artificial recharge on dissolved noble gases in groundwater in California, USA: Environmental Science and Technology, v. 42, p. 1017–1023.

    Mukherjee, A., von Brömssen, Mattias, Scanlon, B. R., Bhattacharya, J. P., Fryar, A. E., Hasan, M. A., Ahmed, K. M., Chatterjee, Debashis, Jacks, Gunnar, and Sracek, Ondra, 2008, Hydrogeochemical comparison and effects of overlapping redox zones on groundwater arsenic near the Western (Bhagirathi sub-basin, India) and Eastern (Meghna sub-basin, Bangladesh) margins of the Bengal Basin: Journal of Contaminant Hydrology, v. 99, p. 31–48.

    Gates, J. B., Edmunds, W. M., Ma, J., and Scanlon, B. R., 2008, Estimating groundwater recharge in a cold desert environment in northern China using chloride: Hydrogeology Journal, v. 16, p. 893–910.

    Scanlon, B. R., Reedy, R. C., and Bronson, K. F., 2008, Impacts of land use change on nitrogen cycling archived in semiarid unsaturated zone nitrate profiles, southern High Plains, Texas: Environmental Science & Technology v. 42, no. 20, p. 7566–7572.

    Scanlon, B. R., Reedy, R. C., Jackson, W. A., and Rao, B., 2008, Mobilization of naturally occurring perchlorate related to land-use change in the Southern High Plains: Environmental Science & Technology, v. 42, no. 23, p. 8648–8653.

    Scanlon, B. R., Reedy, R. C., Baumhardt, R. L., and Strassberg, Gil, 2008, Impact of deep plowing on groundwater recharge in a semiarid region: case study, High Plains, Texas: Water Resources Research, v. 44, W00A10, doi:10.1029/2008WR006991.

    Strassberg, Gil, Scanlon, B. R., and Rodell, M., 2007, Comparison of seasonal terrestrial water storage variations from GRACE with groundwater-level measurements from the High Plains aquifer (USA): Geophysical Research Letters, v. 34, L14402.

    Scanlon, B. R., Jolly, I. M., Sophocleous, M., and Zhang, L., 2007, Global impacts of conversions from natural to agricultural ecosystems on water resources: Quantity versus quality, Water Resources Research, v. 43, W03437, doi:10.1029/2006WR005486.

    Rao, B., Anderson, T. A., Orris, G. J., Rainwater, K. A., Rajagopalan, S., Sandvig, R. M., Scanlon, B. R., Stonestrom, D. A., Walvoord, M. A., and Jackson, W. A., 2007, Widespread natural perchlorate in unsaturated zones of the southwest United States: Environmental Science and Technology, v. 41, 4522–4528.

    Scanlon, B. R., Reedy, R. C., and Tachovsky, J. A., 2007, Semiarid unsaturated zone chloride profiles: archives of past land-use change impacts on water resources in the southern High Plains, United States, Water Resources Research, v. 43, W06423, doi:10.1029/2006WR005769.

    Reedy, R. C., Scanlon, B. R., Nicot, J. -P., and Tachovsky, J. A., 2007, Unsaturated zone arsenic distribution and implications for groundwater contamination: Environmental Science & Technology, v. 41, no. 20, p. 6914–6919.

    Kurtzman, Daniel, and Scanlon, B. R., 2007, El Niño—southern oscillation and pacific decadal oscillation impacts on precipitation in the southern and central United States: evaluation of spatial distribution and predictions: Water Resources Research, v. 43, W10427, doi:10.1029/2007WR005863 [12 p.].

    Newman, B. D., Wilcox, B. P., Archer, S. R., Breshears, D. D., Dahm, C. G., Duffy, C. J., McDowell, N. G., Phillips, F. M., and Scanlon, B. R., 2006, Ecohydrology of water-limited environments: a scientific vision: Water Resources Research, v. 42, W06302, doi:10.1029/2005WR004141, 2006, 15 p.

    Newman, B. D., Wilcox, B., Archer, S. R., Breshears, D. D., Dahm, C. N., Duffy, C. J., McDowell, N. G., Phillips, F. M., Scanlon, B. R., and Vivoni, E. R., 2006, Ecohydrology of water-limited environments: a scientific vision: Water Resources Research, v. 42, W06302, doi: 10.1029/2005WR004141 [15 p.].

    Scanlon, B. R., Keese, K. E., Flint, A. L., Flint, L. E., Gaye, C. B., Edmunds, W. M., and Simmers, Ian, 2006, Global synthesis of groundwater recharge in semiarid and arid regions: Hydrological Processes, v. 20, p. 3335–3370.

    Scanlon, B. R., Reedy, R. C., Keese, K. E., and Dwyer, S. F., 2005, Evaluation of evapotranspirative covers for waste containment in arid and semiarid regions in the southwestern USA: Vadose Zone Journal, v. 4, p. 55–71.

    Scanlon, B. R., Reedy, R. C., Stonestrom, D. A., and Prudic, D. E., 2005, Impact of land use and land cover change on groundwater recharge and quantity in the southwestern USA: Global Change Biology, v. 11, p. 1577–1593.

    Scanlon, B. R., Levitt, D. G., Reedy, R. C., Keese, K. E., and Sully, M. J., 2005, Ecological controls on water-cycle response to climate variability in deserts: Proceedings of the National Academy of Sciences, v. 102, no. 17, p. 6033–6038.

    Keese, K. E., Scanlon, B. R., and Reedy, R. C., 2005, Assessing controls on diffuse groundwater recharge using unsaturated flow modeling: Water Resources Research, v. 41, W06010, doi:10.1029/2004WR003841 [12 p.].

    Reedy, R. C., and Scanlon, B. R., 2003, Soil water content monitoring using electromagnetic induction: Journal of Geotechnical and Geoenvironmental Engineering, November, p. 1028–1039.

    Scanlon, B. R., Mace, R. E., Barrett, M. E., and Smith, Brian, 2003, Can we simulate regional groundwater flow in a karst system using equivalent porous media models? Case study, Barton Springs Edwards aquifer, USA: Journal of Hydrology, v. 276, p. 137–158.

    Scanlon, B. R., Keese, Kelley, Reedy, R. C., Simunek, Jirka, 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, 18 p.

    Scanlon, B. R., Christman, Marty, Reedy, R. C., Porro, Indrek, Simunek, Jirka, and Flerchinger, G. N., 2002, Intercode comparisons for simulating water balance of surficial sediments in semiarid regions: Water Resources Research, v. 38, no. 12, 16 p.

    Scanlon, B. R., and Cook, P. G., 2002, Preface: Theme issue on groundwater recharge: Hydrogeology Journal, v. 10, p. 3–4.

    Scanlon, B. R., Healy, Rick, and Cook, P. G., 2002, Choosing appropriate techniques for quantifying groundwater recharge: Hydrogeology Journal, v. 10, p. 18–39.

    Scanlon, B. R., 2000, Uncertainties in estimating water fluxes and residence times using environmental tracers in an arid unsaturated zone: Water Resources Research, v. 36, no. 2, p. 395–409.

    Scanlon, B. R., Paine, J. G., and Goldsmith, R. S., 1999, Evaluation of electromagnetic induction as a reconnaissance technique to characterize unsaturated flow in an arid setting: Ground Water, v. 37 no. 2, p. 296–304.

    Scanlon, B. R., 1999, Reply to “Comment on ‘Field Study of Spatial Variability in Unsaturated Flow beneath and adjacent to Playas’ by Bridget R. Scanlon and Richard S. Goldsmith, by W. W. Wood, p. 601”: Water Resources Research, v. 35, no. 2, p. 603–604.

    Scanlon, B. R., Langford, R. P., and Goldsmith, R. S., 1999, Relationship between geomorphic settings and unsaturated flow in an arid setting: Water Resources Research, v. 35, p. 983–999.

    Paine, J. G., Goldsmith, R. S., and Scanlon, B. R., 1998, Electrical conductivity and gamma-ray response to clay, water, and chloride content in fissured sediments, Trans-Pecos Texas: Environmental & Engineering Geoscience, v. 4, no. 2, p. 225–239.

    Scanlon, B. R., Goldsmith, R. S., and Paine, J. G., 1997, Analysis of focused unsaturated flow beneath fissures in the Chihuahuan Desert, Texas, USA: Journal of Hydrology, v. 203, p. 58–78.

    Scanlon, B. R., and Goldsmith, R. S., 1997, Field study of spatial variability in unsaturated flow beneath and adjacent to playas: Water Resources Research, v. 33, no. 10, p. 2239–2252.

    Scanlon, B. R., Tyler, S. W., and Wierenga, P. J., 1997, Hydrologic issues in arid, unsaturated systems and implications for contaminant transport: Reviews of Geophysics, v. 35, no. 4, p. 461–490.

    Xiang, Jiannan, Scanlon, B. R., Mullican, W. F., III, and Chen, L., 1997, A multistep constant-head borehole test to determine field saturated hydraulic conductivity of layered soils: Advances in Water Resources, v. 20, no. 1, p. 45–57.

    Scanlon, B. R., 1994, Water and heat fluxes in desert soils—1. Field studies: Water Resources Research, v. 30, no. 3, p. 709–719.

    Scanlon, B. R., and Milly, P. C. D., 1994, Water and heat fluxes in desert soils—2. Numerical simulations: Water Resources Research, v. 30, no. 3, p. 721–733.

    Scanlon, B. R., 1992, Evaluation of liquid and vapor water flow in desert soils based on chlorine 36 and tritium tracers and nonisothermal flow simulations: Water Resources Research, v. 28, no. 1, p. 285–297.

    Scanlon, B. R., 1992, Moisture and solute flux along preferred pathways characterized by fissured sediments in desert soils: Journal of Contaminant Hydrology, v. 10, p. 19–46.

    Scanlon, B. R., 1991, Evaluation of moisture flux from chloride data in desert soils: Journal of Hydrology, v. 128, p. 137–156.

    Scanlon, B. R., 1990, Relationships between groundwater contamination and major-ion chemistry in a karst aquifer: Journal of Hydrology, v. 119, p. 271–291.

    Scanlon, B. R., Richter, B. C., Wang, F. P., and Mullican, W. F., III, 1990, Analysis of unsaturated flow related to low-level radioactive waste disposal, Chihuahuan Desert, Texas, in Kreitler, C. W., and Sharp, J. M., Jr., eds., Hydrogeology of Trans-Pecos, Texas: The University of Texas at Austin, Bureau of Economic Geology, Guidebook 25, p. 105–112.

    Xiang, Jiannan, Scanlon, B. R., Mullican, W. F., III, and Chen, L., 1997, A multistep constant-head borehole test to determine field saturated hydraulic conductivity of layered soils: Advances in Water Resources, v. 20, no. 1, p. 45–57.

    Scanlon, B. R., 1996, Unsaturated-zone characterization for low-level radioactive waste disposal in Texas: Geotimes, August, p. 22–25.

    Scanlon, B. R., 1989, Physical controls on hydrochemical variability in the Inner Bluegrass Karst Region: Ground Water, v. 27, no. 5, p. 639–646.

    Scanlon, B. R., and Thrailkill, J, 1987, Chemical similarities among physically distinct spring types in a karst terrane: Journal of Hydrology, v. 89, p. 259–279.

  • Lecturing

    Lectures and Addresses

    Advanced techniques for monitoring groundwater: presented at San Antonio Water Systems, San Antonio, Texas, Summer 2011.

    Difficulties in assessing reliability of groundwater storage changes from GRACE satellite data:: presentation to GRACE Science Team Meeting at Center for Space Research, Austin, Texas, Spring 2011.

    GRACE satellite shows increasing groundwater resources in West Africa: presented at Water for Food Conference, Lincoln, Nebraska, Spring 2011.

    Groundwater arsenic contamination in Texas: presented at Texas Commission on Environmental Quality, Summer, 2011. 

    Impact of irrigated agroecosystems on groundwater resources in the U.S. High Plains and North China Plain: poster presented at GSA Annual Meeting, Denver, Colorado, October 31–November 3, 2010.

    Overexploitation of water resources for irrigated agriculture: case studies in the U.S. High Plains and California Central Valley: presented at GSA Annual Meeting, Denver, Colorado, October 31–November 3, 2010.

    Water scarcity within the context of climate change and land use change and linkages to food production in semiarid regions: invited talk presented at GSA Annual Meeting, Denver, Colorado, October 31–November 3, 2010.

    Comparison of irrigated agriculture in the U.S. High Plains and North China Plain: poster presented at Toward Sustainable Groundwater in Agriculture—An International Conference Linking Science and Policy, San Francisco, California, 2010.

    Evaluation of ecohydrology of semiarid environments: presented at Texas State University, San Marcos, Texas, 2010.

    Impacts of agriculture on water resources: presented to USDA, Blackland Research Center, Temple, Texas, 2010.

    Use of GRACE satellite data to monitor global groundwater resources: presented to UNESCO, Amsterdam, The Netherlands, 2010.

    Use of GRACE satellite and subsurface tracers to assess groundwater resources in semiarid regions: presented at Columbia University, New York, New York, 2010.

    Comparison of irrigated agriculture in the U.S. High Plains and North China Plain: presented at International Groundwater Forum 2010, Securing Groundwater in a Changing World, Beijing, China, 2010.

    Approaches toward sustainable groundwater resources in the U.S. High Plains and North China Plain: presented at Luangcheng Agricultural Station, Luangcheng, China, 2010.

    Impacts of irrigation on water resources in the U.S. High Plains and North China Plain: presented at Tsinghua University, Beijing, China, 2010.

    Use of GRACE satellite data for water resources management: Summer Course presented at Integrated River Basin Management, Beijing, China, 2010.

    Satellite and ground-based approaches for monitoring impacts of agriculture on groundwater resources: keynote address presented at Toward Sustainable Groundwater in Agriculture—An International Conference Linking Science and Policy, San Francisco, California, 2010.

    Novel satellite and ground-based techniques for watershed planning: presented at World Bank Lectures, Washington, D.C., February 2010.

    Climate change and land use change impacts on groundwater resources in semiarid regions: presented at Bureau of Economic Geology seminar, Austin, Texas, November 2009.

    Comparison of land use change impacts on water resources in the southwest U.S. (Texas High Plains) and the Sahel region (southwest Niger): presented at 2IE University, Ouagadougou, Burkina Faso, W. Africa, 2009.

    How long will the Ogallala aquifer last?: presented to Texas Exes, The University of Texas at Austin, Austin, Texas, 2009.

    Impacts of cultivation on groundwater resource in semiarid regions: comparison of the southwest U.S. (Texas High Plains) and the Sahel region (southwest Niger): presented at Université Cheikh Anta Diop, Dakar, Sénégal, 2009.

    Impacts of irrigation on water resources in the Texas High Plains: presented at the Texas Water Development Board, Austin, Texas, 2008.

    Impacts of changing land use on subsurface water resources in the semiarid Southern High Plains, Texas, USA: presented at the Department of Geography and Geology, University of Copenhagen, Copenhagen, Denmark, 2009.

    Land use change impacts on water resources in the southwest U.S. relative to southwest Niger: presented at University Abdou Moumoun, Niamey, Niger, 2009.

    Source and mobilization of perchlorate in groundwater in the Texas High Plains: presented to EPA, Dallas, Texas, 2009.

    Integration of hydrogeology and soil science for sustainable water resources—focus on water quantity: presented at Geological Society of America Annual Meeting, Houston, Texas, October 2008.

    Texas aquifers: presented to high school teachers, The University of Texas at Austin, Institute for Geophysics, Austin, Texas, 2008.

    Perchlorate mobilization related to land use change in the Southern High Plains, USA: presented at American Geophysical Union Fall Meeting, Arlington, Virginia, December 2007.

    Naturally occurring arsenic contamination in a semiarid oxidizing system, Southern High Plains aquifer, USA: presented at Geological Society of America Annual Meeting, Denver, Colorado, October 28–29, 2007.

    Birdsall Dreiss Lectures, presented at 30 universities, Spring, 2007 and 25 Universities, Fall, 2007

    Implications of climate variability for groundwater resources and waste disposal in semiarid regions—a look at ecological controls from annual to millennial timescales: Birdsall-Dreiss distinguished lecture presented at the Geological Society of America Annual Meeting, Denver, Colorado, October 2007.

    Impacts of Changing Land Use on Subsurface Water Resources in Semiarid Regions
    Implications of Climate Variability for Groundwater Resources and Waste Disposal in Semiarid Regions–A Look at Ecological Controls from Annual to Millennial Timescales: Birdsall Dreiss Lectures, presented at 30 universities, February 2007.

    Evaluation of Groundwater Arsenic Contamination in the Southern High Plains, Texas, presented at the Austin Geological Society, 2006.

    Impact of climate variability and land use/land cover change on groundwater recharge in the Southwest U.S.: presented to Lawrence Livermore National Laboratory, Livermore, California, June 2005.

    Impacts of the shift from natural to agricultural ecosystems archived in unsaturated and saturated zone systems in the Southern High Plains: presented at American Geophysical Union Meeting, San Francisco, California, 2005.

    Integration of physical and chemical data to assess impacts of changes from natural to agricultural ecosystems on subsurface flow and transport in semiarid regions: presented at American Geophysical Union Meeting, San Francisco, California, 2005 (INVITED).

    Comparison of different approaches for relating ecology and hydrology in semiarid regions: presented at American Geophysical Union Joint Assembly, New Orleans, Louisiana, May 2005.

    Overview of recharge studies in the Southwest U.S.: presented at International Atomic Energy Agency, Vienna, Austria, January 2005.

    Potential for collaboration between University of Texas and Comision Nacional del Agua: presented to Comision Nacional del Agua, Mexico City, Mexico, 2005.

    Ecological controls on the water cycle in water-limited ecosystems: presented at Annual Meeting for the Society of Range Management, Fort Worth, Texas, 2005.

    Estimating groundwater recharge in porous media aquifers in Texas: presented at Texas Groundwater 2004: Towards Sustainability: Texas State University Capitol Conference, San Marcos, Texas, November 2004.

    Impact of land-use change on groundwater recharge in the southwestern United States: presented at Geological Society of America Meeting, Denver, Colorado, November 2004.

    Potential advances in quantifying the water cycle in karst systems using hydrologic observatory approach: presented at Geological Society of America Meeting, Denver, Colorado, November 2004.

    Measurement, monitoring, and modeling analyses of a proposed low-level nuclear waste facility in Texas: presented at Geological Society of America Meeting, Denver, Colorado, November 2004.

    Estimating groundwater recharge in porous media aquifers in Texas: presented at Texas Groundwater 2004: Towards Sustainability: Texas State Capitol Extension, San Marcos, Texas, November 2004.

    Ecological controls on water cycle response to climate change in semiarid regions: presented at University of Nebraska, Lincoln, Nebraska, 2004.

    Ecological controls on water cycle response to climate variability in water limited ecosystems: presented at Pacific Northwest National Laboratory, Richland, Washington, 2004.

    Ecological controls on water cycle response to climate variability in water limited ecosystems: presented as U.T. Department of Geological Sciences Technical Talk, Austin, Texas, 2004.

    Impact of land use change on groundwater recharge in the Southern High Plains groundwater resources: presented at Challenges and Opportunities Meeting, Lubbock, Texas, 2004.

    Role of vegetation in controlling water balance at the land atmosphere interface in water limited ecosystems: presented at Texas A&M, College Station, Texas, 2004.

    Evaluating climate, vegetation, and soil controls on groundwater recharge using unsaturated flow modeling: presented with K. E. Keese and R. C. Reedy at TWDB Conference on Aquifers of West Texas, San Angelo, Texas, 2004.

    UT tech talk: presented at University of Nebraska, Lincoln, Nebraska, 2004.

    UT tech talk: presented at Oregon State University, Corvallis, Oregon, 2004.

    Evaluating the performance of ET covers for waste containment in semiarid/arid regions (with R. Reedy, K. Keese, and S. Dwyer): presented at EPA Alternative Covers Performance Conference, Denver, Colorado, 2004.

    Vegetational controls on water balance at the land atmosphere interface in semiarid to arid ecosystems: presented at Texas A&M University, College Station, Texas, 2004.

    Ecological controls on water cycle response to climate variability in desert regions: invited lecture presented at Oregon State University, Corvallis, Oregon, 2004.

    Impact of land use change from natural to agricultural ecosystems on groundwater recharge: presented at American Geophysical Union Meeting, San Francisco, California, 2004.

    Estimating groundwater recharge to Texas aquifers using unsaturated zone modeling (with K. Keese and R. C. Reedy): poster presented to Austin Geological Society, Austin, Texas, February 2003.

    Role of vegetation in controlling water balance at the land-atmosphere interface in water limited ecosystems (with D. Levitt, M. J. Sully, K. Keese, R. C. Reedy, J. Simunek, L. Desotell, and C. Lohrstrofer): presented to American Geophysical Union, 2003.

    Techniques for estimating groundwater recharge: presented at 24th Biennium Groundwater Conference and 12th Annual Meeting: Groundwater Resources Association of California, Ontario, CA, 2003.

    Intercode comparisons for simulating the water balance of engineered covers in semiarid regions (with M. Christman, R. C. Reedy, I. Porro, J. Simunek, and G. N. Flerchinger): presented at the International Applied Phytotechnologies Conference, Chicago, Illinois, 2003.

    Modeling Barton Springs aquifer: presented to Barton Springs Edwards Aquifer Authority, Austin, Texas, Fall 2003.

    Review of techniques for estimating groundwater recharge: presented to the Irish Geological Survey, Dublin, Ireland, 2003.

    Atmospheric and land surface measurements in a prototype hydrologic observatory (with W. Krajewski, J. Famiglietti, and C. J. Duffy): presented to American Geophysical Union, 2003.

    Ecohydrological controls on the water cycle in desert systems: presented to the U.S. Geological Survey, Reston, Virginia, 2003.

    Defining the need for augmented recharge—techniques for quantifying recharge: presented to California Groundwater Resources Association, San Jose, California, 2003.

    Unsaturated zone studies related to natural systems and evapotranspiration covers: presented to Pantex AIP, Austin, Texas, October 2002.

    Variations in flow and transport in thick desert vadose zones in response to paleoclimatic forcing (0–90 kyr): presented to Department of Geological Sciences, The University of Texas at Austin, October 2002.

    Aquifer demonstration: presented to Cedar Creek Elementary School, Austin, Texas, May 2002.

    Groundwater fluxes across interfaces: presented to National Academy of Sciences, Door County, Wisconsin, May 2002.

    Groundwater modeling in the Barton Springs segment of the Edwards aquifer, Texas: presented to Austin Geological Society, Austin, Texas, April 2002.

    Groundwater recharge in Texas: presented to Texas Water Development Board, Austin, Texas, April 2002.

    Hydrologic processes in thick vadose zones in interdrainage semiarid regions: monitoring and modeling analysis: Bureau of Economic Geology research seminar, The University of Texas at Austin, Austin, Texas, April 2002.

    Comparison of various techniques for evaluating unsaturated flow in the Chihuahuan Desert of Texas: presented to the University of Arizona, Department of Hydrology, USGS, Tucson, Arizona, April 2002.

    Overview of unsaturated flow studies in semiarid regions: presented to Texas A&M University, College Station, Texas, March 2002.

    Monitoring and modeling of engineered covers: presented to the Environmental Protection Agency, Cincinnati, Ohio, 2002.

    Groundwater recharge in the Texas High Plains: presented at the Geological Society of America Annual Meeting, Denver, Colorado, 2002.

    Groundwater modeling of the Barton Springs segment of the Edwards aquifer: presented at Regional Water Planning Group Meeting, Bastrop, Texas, October 2001.

    Suitability of alternative engineered covers for waste containment: presented at Texas Natural Resource Conservation Commission, Austin, Texas, September 2001.

    Hydrogeology 346: presented to Jay Famiglietti's class, February 2001.

    Results of unsaturated zone monitoring at the Pantex Plant: presented at U.S. Department of Energy, Pantex, Amarillo, Texas, February 2001.

    Isotope Hydrology: presented to Jay Banner's class, March and April, February 2001.

    Use of engineered covers for waste containment: presented at Air Force Center for Environmental Excellence, San Antonio, Texas, February 2001.

    Comparison of different numerical codes for simulating unsaturated flow: presented to Department of Hydrology, University of Nevada, Reno, Nevada, December 2000.

    Groundwater recharge in arid climates: assessing the errors: presented at U.S. Geological Survey National Hydrology Meeting, Reno, Nevada, November 2000.

    Numerical simulations of engineered cover performance for waste Containment: presented at Department of Geological Sciences, Seminar Series, The University of Texas at Austin, Austin, Texas, October 2000.

    Numerical modeling and monitoring of engineered covers: workshop for educators: presented to U.S. Environmental Protection Agency, Cincinnati, Ohio, July 2000.

    Analysis of design, monitoring, and modeling issues related to engineered covers for waste containment: presented to U.S. Environmental Protection Agency, Cincinnati, Ohio, July 2000.

    Evaluation of natural recharge rates for characterizing waste disposal sites in semiarid regions: presented at Natural Recharge of Groundwater Symposium, Tempe, Arizona, June 2, 2000.

    Basic principles of unsaturated zone hydrology: presented to Department of Geological Sciences Field Class, The University of Texas at Austin, Austin, Texas, May 19, 2000.

    EarthView Texas: using GIS to see local geology and hydrology: presented at Rio Hondo and Los Fresnos ISD, Brownsville, Texas, February 2000.

    Techniques for quantifying recharge: Texas Water Development Board, Austin, Texas, February 2000.

    Evaluation of groundwater availability in the Barton Springs segment of the Edwards aquifer on the basis of numerical simulations: presented to Lower Colorado Water Planning Group (Region K) and to Lower Colorado River Authority, Austin, Texas, February 2000.

    Groundwater recharge in arid climates: assessing errors: presented at USGS National Meeting, Reno, Nevada, 2000.

    Overview of techniques for quantifying recharge: presented at National Groundwater Association Annual Meeting, Austin, Texas, 2000.

    Results of numerical simulations of groundwater flow for the Barton Springs segment of the Edwards aquifer: presented to Lower Colorado River Authority and Regional Water Planning Group K , Austin, Texas, 2000.

    Overview of techniques for quantifying recharge: presented at National Ground Water Association Meeting, Austin, Texas, 2000.

    Controls on unsaturated flow in semi-arid regions: presented to the U.S. Salinity Laboratory, Riverside, California, 1999.

    Evaluation of unsaturated flow in arid settings: presented to the Department of Hydrology, Rehovot, Israel, 1999.

    Uncertainties in estimating water fluxes and dating pore water in arid unsaturated zones: presented to the Department of Geological Sciences, The University of Texas at Austin, 1999.

    Evaluation of water fluxes and ages in an arid setting: presented at Petroleum and Geosystems Engineering, The University of Texas at Austin, April 1998.

    Monitoring techniques related to subsurface gas transport: presented at the University of Arizona, Maricopa Experimental Station, Phoenix, Arizona, 1998.

    Use of environmental tracers to estimate water fluxes in the unsaturated zone: presented to Department of Geological Sciences, The University of Texas at Austin, 1998.

    Uncertainties in estimating water fluxes and dating pore water in arid unsaturated zones: presented to the Department of Geology, The University of Texas at Dallas, November 1997.

    Evaluation of focused recharge beneath playas and implications for agricultural practices: presented to the Texas Agricultural Extension Service at Lubbock, 1997.

    Overview of unsaturated zone hydrologic studies related to radioactive waste disposal in Texas: presented to The University of Texas at El Paso, 1997.

    Basic Principles of Unsaturated Zone Hydrology: presented to Department of Civil Engineering class on Contaminant Hydrology, March 1996.

    Quantification of air flow through the unsaturated zone: presented at a Review Meeting on Monitoring Issues Related to the Unsaturated Zone held by the University of Arizona and the Nuclear Regulatory Agency, Maricopa, Arizona, February 1996.

    Evaluation of Liquid and Vapor Flow in Arid Unsaturated Zones: presented to the Department of Civil Engineering Seminar Series, February 1996.

    Issues related to Ward Valley, the proposed low-level radioactive waste disposal facility in California: presented to the Low Level Radioactive Waste Disposal Board, Austin, Texas, 1995.

    Controls on subsurface flow in an arid setting including evaluation of preferred pathways: presented at the VII Evans Workshop, “Flow and Transport through Unsaturated Fractured Rock,” Phoenix, Arizona, 1995.

    Review of unsaturated zone studies in arid sites and implications for contaminant transport: presented to Nuclear Waste Technical Review Board, San Francisco, California, 1995.

    Review of unsaturated zone studies in arid sites and implications for contaminant transport: presented to Department of Geological Sciences, The University of Texas at Austin, 1995.

    Evidence for focused recharge beneath playas in the Southern High Plains, Texas: presented at the Playa Basin Symposium, Texas Tech University, Water Resources Center, Lubbock, Texas, 1994.

    Low-level radioactive waste disposal in arid settings: Texas as an example: presented to the Board on Radioactive Waste Management, National Academy of Sciences, Los Angeles, California, 1994.

    Analysis of unsaturated flow in desert soils: presented to The University of Texas at Austin, Department of Geological Sciences, 1993.

    Results of numerical simulations of nonisothermal liquid and vapor flow in arid systems: presented at Princeton University, Department of Civil Engineering, 1993.

    Long-term simulation of nonisothermal liquid and vapor flow in desert soils: case study Chihuahuan Desert, West Texas: presented at Southwest Research Institute, 1993.

    Evaluation of recharge rates using chemical tracers at low-level radioactive waste disposal sites in the Chihuahuan Desert, Texas: presented at Workshop on Chloride and 36Cl Studies in the Arid Southwest, Las Vegas, Nevada, 1993.

    Numerical simulations of unsaturated flow in semiarid systems: presented to The University of Arizona at Tucson, Department of Hydrology, Tucson, Arizona, 1992.

    Preferential flow in fissured sediments related to site characterization of a low-level radioactive waste disposal facility in Texas: presented at the INTRAVAL workshop, Las Cruces, New Mexico, 1992.

    Evaluation of moisture flux in semiarid soils: presented to The University of Nevada at Reno, Department of Geology, Reno, Nevada, 1992.

    Comparison of chemical and hydraulic approaches in evaluation of moisture flux in desert soils: presented at the U.S. Geological Survey, Denver, Colorado, 1991.

    Importance of vapor transport in unsaturated flow in arid systems: a case study in the Chihuahuan Desert of Texas: presented at the University of Nevada, Las Vegas, 1991.

    Comparison of physical and chemical approaches to evaluation of moisture flux in desert soils: presented at the University of California, Davis, Department of Land, Air, and Water Research, 1990.

    Bomb chlorine-36 analysis in the characterization of unsaturated flow at a proposed radioactive waste disposal facility, Chihuahuan Desert, Texas: presented at the Accelerator Mass Spectrometry Conference, Paris, France, 1990.

    Analysis of unsaturated flow in the Chihuahuan Desert, West Texas: presented to the University of Rochester, Department of Geological Sciences, Rochester, New York, 1989.

    Summary of unsaturated-zone studies in the Chihuahuan Desert related to low-level radioactive waste disposal: presented to the Texas Low-Level waste disposal Authority, Board of Directors, Austin, Texas, 1989.

    Physical controls on hydrochemical variability in a karst aquifer: presented to The University of Texas at Austin, Department of Geological Sciences, hydrogeology seminar, Austin, Texas, 1987.


    Short Courses

    Groundwater Arsenic Contamination in Texas: short course presented to TCEQ, Austin, Texas, Summer 2011.

    Groundwater Geochemistry: short course presented to TCEQ with J. P. Nicot, Austin, Texas, Spring 2008.

    Fate and Transport in the Subsurface: short course presented to TCEQ with J. P. Nicot, Austin, Texas, Spring 2008.

    Elements of Groundwater Hydrology: short course presented to TCEQ with J. P. Nicot, Austin, Texas, Spring 2008.

    Groundwater Arsenic Contamination in Texas: short course presented to TCEQ with J. P. Nicot, Austin, Texas, Spring 2008.

    Estimating rates of groundwater recharge (co-taught with Rick Healy, USGS: presented at the GSA Annual Meeting, Houston, Texas, October 2008.

    Groundwater arsenic contamination (co-taught with Dr. Nicot): 1-day short course presented to Texas Commission on Environmental Quality (TCEQ), Austin, Texas, February 2006, 2007.

    Fate and transport (with J. P. Nicot): presented to Texas Commission on Environmental Quality (TCEQ), Austin, Texas, Spring 2003–2007.

    Evaluation of groundwater arsenic contamination in Texas: 4-hour short course presented to TCEQ, Austin, Texas, 2005.

    Groundwater-surface water interactions focusing on water quantity and water quality issues: 1-day short course presented to TCEQ, Austin, Texas, 2005.

    Fate and transport (with J. P. Nicot): presented to Texas Commission on Environmental Quality (TCEQ), Austin, Texas, February 2004.

    Fate and transport (with J. P. Nicot): presented to Texas Commission on Environmental Quality (TCEQ), Austin, Texas, February 2004.

    Estimating rates of groundwater recharge: cotaught with Rick Healey at Geological Society of America meeting, Denver, Colorado, 2004.

    Assessment of groundwater surface water interactions: presented to EPA Region 6, Dallas, Texas, October 2003.

    Groundwater surface water interactions: presented to Texas Commission on Environmental Quality, Austin, Texas, August 2003.

    Fate and transport (with J. P. Nicot): presented to Texas Commission on Environmental Quality (TCEQ), Austin, Texas, February 2003.

    Interactions of groundwater and surface water: presented at Regional EPA Meeting at TCEQ, Austin, Texas, 2003.

    Unsaturated zone hydrology: presented to Texas Natural Resources Conservation Commission, Austin, Texas, April 2002.

    Estimating rates of groundwater recharge (co-taught with Dr. Healy): 1-day short course presented at Geological Society of America Annual Meeting, Boston, Massachusetts, November 2001.

    Techniques for quantifying groundwater recharge: Short Course: Geological Society of America Annual Meeting, Boston, Massachusetts, November 2001.

    Unsaturated zone hydrology: Short Course: Texas Natural Resources Conservation Commission, Austin, Texas, August 2001.

    Techniques for estimating groundwater recharge: Short Course: Texas Water Development Board, Austin, Texas, June 2001.

    Unsaturated zone hydrology, organic contaminant transport, and groundwater modeling: presented at University College, Department of Civil Engineering, Cork, Ireland, Spring 1997.

    Physical and environmental tracer data to quantify spatial and temporal variability in unsaturated flow: presented at the Summer School on European Water Resources and Climate Change Processes, University College, 1997.

    Geology 391, Unsaturated zone hydrology: presented to The University of Texas at Austin, Department of Geological Sciences, October 1996.

    Geology 391, Unsaturated zone hydrology: presented to The University of Texas at Austin, Department of Geological Sciences, February 1995.

    Geology 391, Unsaturated zone hydrology: presented to The University of Texas at Austin, Department of Geological Sciences, February 1994.

    Unsaturated-flow studies related to low-level radioactive waste disposal: sponsored by the American Nuclear Society and presented to the University of Nevada, 1989.


    University Teaching

    Unsaturated Zone Hydrology: 3-hr-credit course, GEO 27225  and 27490, presented at Department of Geological Sciences, The University of Texas at Austin, Austin, Texas, Fall 2008.
    Environmental isotope geochemistry (Co-taught with Dr. Banner): 3-hour-credit course, GEO 388H, presented at Department of Geological Sciences, The University of Texas at Austin, Austin, Texas, February 2003, 2005.

    Ground water pollution and contaminant transport: 3-hour-credit graduate course presented at the Department of Civil Engineering, The University of Texas at Austin, Austin, Texas, February March, 2005.

    Vadose zone hydrology (cotaught with Dr. McCray): 3-hour-credit course, GEO 391, presented at The University of Texas at Austin, Austin, Texas, February 2004.

    Unsaturated zone hydrology: presented to Department of Geological Sciences field class, The University of Texas at Austin, Austin, Texas, May 2002.

    Ground water pollution and contaminant transport: 3-hour-credit graduate course presented at the Department of Civil Engineering, The University of Texas at Austin, Austin, Texas, February 1998.

    Unsaturated zone hydrology, organic contaminant transport, and groundwater modeling: presented to University College, Department of Civil Engineering, Cork, Ireland, February 1997.

    Physical and environmental tracer data to quantify spatial and temporal variability in unsaturated flow: presented at the Summer School on European Water Resources and Climate Change Processes, University College, 1997.

    Basic principles of unsaturated flow and solute transport: presented at the Department of Geological Sciences, The University of Texas at Austin, Austin, Texas, 1992.

    Basic principles of unsaturated flow and solute transport: presented to The University of Texas at Austin, Department of Geological Sciences, 1992.

    Basic principles of unsaturated flow and solute transport: presented at the Department of Geological Sciences, The University of Texas at Austin, Austin, Texas, 1991.

    Geology 382, Analysis of unsaturated flow related to radioactive waste disposal: presented at The University of Texas at Austin, Department of Geological Sciences, 1990.