Fred D Tillman, Jr., Ph.D.

Biography

Fred Tillman joined the USGS Arizona Water Science Center in Tucson, AZ in 2006 after two-plus years as a National Research Council (NRC) fellow with the USEPA Office of Research and Development (ORD) in Athens, Georgia.  His current projects include monitoring the extent of 1,4-dioxane and chromium contamination in groundwater at the Tucson Airport Remediation Project (TARP) Superfund Site, investigating potential changes in groundwater recharge under projected climate change in the upper Colorado River basin, and understanding the potential for uranium mining impacts on regional water resources in the Grand Canyon area.

Prior to joining the USGS, Fred was a post-doctoral researcher with the Ecosystems Research Division of USEPA’s ORD from 2004 through mid-2006, working with Dr. James W. Weaver on issues related to soil vapor intrusion, particularly from leaking underground storage tanks.  Results from this research are documented in several journal and web publications (see below).  Fred joined EPA after completion of his doctoral degree in Environmental Engineering at the University of Virginia in 2003, where he worked with Dr. James A. Smith on the response of volatile organic compound (VOC) vapors in the unsaturated zone to natural barometric pressure fluctuations (barometric pumping).

 

Education

  • Ph.D. 2003, Environmental Engineering, University of Virginia, Charlottesville, VA
  • M.S. 1998, Environmental Engineering, University of Virginia, Charlottesville, VA
  • B.S. 1990, Electrical Engineering, Florida State University, Tallahassee, FL

Publications

GOOGLE SCHOLAR PROFILE

Tillman, F.D, Coes, A.L., Anning, D.W., Mason, J.P., and Coplen, T.B., 2019, Investigation of recent decadal-scale cyclical fluctuations in salinity in the lower Colorado River.  Journal of Environmental Management, 235, p. 442-452. [Link]

Tillman, F.D, Pruitt, T., and Gangopadhyay, S., 2018, Effect of spatial and temporal scale on simulated groundwater recharge investigations.  Advances in Water Resources, 119, p. 257–270. [Link]

Tillman, F.D, Anning, D.W., Heilman, J.A, Buto, S.G., and Miller, M.P., 2018, Managing salinity in upper Colorado River basin streams: Selecting catchments for sediment control efforts using watershed characteristics and random forests models.  Water, 10, 676.  [Link

Tillman, F.D, 2017, Concentration and trend of 1,4-dioxane in wells sampled during 2002–2017 in the vicinity of the Tucson International Airport Area Superfund Site.  U.S. Geological Survey Scientific Investigations Map 3385, scale 1:7,500, 1 sheet. [Link]

Beisner, K.R., Tillman, F.D, Anderson, J.R., Antweiler, R.C., and Bills, D.J., 2017, Geochemical characterization of groundwater discharging from springs north of the Grand Canyon, Arizona, 2009–2016. U.S. Geological Survey Scientific Investigations Report 2017–5068, 58 p. [Link]

Tillman, F.D, Gangopadhyay, S., and Pruitt, T., 2017, Changes in projected spatial and seasonal groundwater recharge in the upper Colorado River basin.  Groundwater, 55, p. 506–518. [Link]

Beisner, K.R, Paretti, N.V., Tillman, F.D, Naftz, D.L., Bills, D.J., Walton-Day, K., and Gallegos, T.J., 2016, Geochemistry and hydrology of perched groundwater springs: assessing elevated uranium concentrations at Pigeon Spring relative to nearby Pigeon Mine, Arizona (USA).  Hydrogeology Journal, 25, p. 539–556. [Link]

Tillman, F.D, Gangopadhyay, S., and Pruitt, T., 2017, Understanding the past to interpret the future: comparison of simulated groundwater recharge in the upper Colorado River basin (USA) using observed and general-circulation-model historical climate data.  Hydrogeology Journal, 25, p. 347–358.  [Link]

Tillman, F.D, McCleskey, R.B., and Hermosillo, E., 2016, Investigation of Total and Hexavalent Chromium in Filtered and Unfiltered Groundwater Samples at the Tucson International Airport Superfund Site.  Bulletin of Environmental Contamination and Toxicology, 97, p. 543–547.  [Link]

Tillman, F.D, Gangopadhyay, S., and Pruitt, T., 2016, Changes in groundwater recharge under projected climate in the upper Colorado River basin.  Geophysical Research Letters, 43, p. 6968–6974. [Link]

Tillman, F.D, 2016, Soil-water balance groundwater recharge model results for the upper Colorado River basin. U.S. Geological Survey Data Release. [Link]

Tillman, F.D, Wiele, S.M., and Pool, D.R., 2016, A comparison of estimates of basin-scale soil-moisture evapotranspiration and estimates of riparian groundwater evapotranspiration with implications for water budgets in the Verde Valley, Central Arizona, USA.  Journal of Arid Environments, 124, p. 278–291. [Link]

Tillman, F.D, Gangopadhyay, S., Pruit, T., 2016, A Case Study on Evaluating Impacts of Potential Climate Change on Groundwater Resources: Groundwater Recharge in the Upper Colorado River Basin.  Bureau of Reclamation Technical Memorandum No. 86-68210-2016-11, 28 p.  [Link]

Tillman, F.D, 2015, Documentation of input datasets for the soil-water balance groundwater recharge model of the Upper Colorado River Basin.  U.S. Geological Survey Open-File Report 2015–1160, 17 p.  [Link]

Rumsey, C.A., Miller, M.P., Susong, D.D., Tillman, F.D, and Anning, D.W., 2015, Regional scale estimates of baseflow and factors influencing baseflow in the Upper Colorado River Basin.  Journal of Hydrology: Regional Studies, 4, part B, p. 91–107.  [Link]

Tillman, F.D, Flynn, M.E., and Anning, D.W., 2015, Geospatial datasets for assessing the effects of rangeland conditions on dissolved-solids yields in the Upper Colorado River Basin.  U.S. Geological Survey Open-File Report 2015-1007, 21 p.  [Link]  

Tillman, F.D, Oki, D.S., Johnson, A.G., Barber, L.B., and Beisner, K.R., 2014, Investigation of Geochemical Indicators to Evaluate the Connection between Inland and Coastal Groundwater Systems near Kaloko-Honokōhau National Historical Park, Hawai‘i.  Applied Geochemistry, 51, p. 278–292.  [Link]

Tillman, F.D, Oki, D.S., and Johnson, A.G., 2014, Water-chemistry data collected in and near Kaloko-Honokōhau National Historical Park, Hawai‘i, 2012–2014.  U.S. Geological Survey Open-File Report 2014-1173, 14 p.  [Link]

Tillman, F.D, Pool, D.R., and Leake, S.A., 2014, The effect of modeled recharge distribution on simulated groundwater availability and capture.  Groundwater, 53, no. 3 p. 378-388.  [Link]  

Tillman, F.D, and Anning, D.W., 2014, Updated estimates of long-term average dissolved-solids loading in streams and rivers of the Upper Colorado River Basin.  U.S. Geological Survey Open-File Report 2014-1148, 11 p.  [Link]

Tillman, F.D, and Anning, D.W., 2014, A data reconnaissance on the effect of suspended-sediment concentrations on dissolved-solids concentrations in rivers and tributaries in the Upper Colorado River Basin.  Journal of Hydrology, 519, p. 1020–1030.  [Link]

Garner, B.D., Pool, D.R., Tillman, F.D., and Forbes, B.T., 2013, Human effects on the hydrologic system of the Verde Valley, central Arizona, 1910–2005 and 2005–2110, using a regional groundwater flow model.  U.S. Geological Survey Scientific Investigations Report 2013–5029, 47 p. [Link]

Tillman, F.D, Garner, B.D., and Truini, M., 2013, Preliminary groundwater flow model of the basin-fill aquifers in Detrital, Hualapai, and Sacramento Valleys, Mohave County, northwestern Arizona.  U.S. Geological Survey Scientific Investigations Report 2013–5122, 52 p. [Link]

Tillman, F.D, Callegary, J.C., Nagler, P.L., and Glenn, E.P., 2012, A simple method for estimating basin-scale groundwater discharge by vegetation in the basin and range province of Arizona using remote sensing information and geographic information systems.  Journal of Arid Environments, 82, p. 44–52. [Link]

Weaver, J.W., Ferguson, J., Small, M., Mukherjee, B., and Tillman, F.D, 2011, Statistical Accounting for Uncertainty in Modelling Transport in Environmental Systems in Rong, Y. (Ed.), Practical Environmental Statistics and Data Analysis:  ILM Publications, Hertfordshire, UK, ISBN 978-1-906799-04-5, p. 163–192.  [Link]

Tillman, F.D, Cordova, J.T., Leake, S.A., Thomas, B.E., and Callegary, J.B., 2011, Water Availability and Use Pilot – Methods Development for a Regional Assessment of Groundwater Availability, Southwest Alluvial Basins, Arizona.  U.S. Geological Survey Scientific Investigations Report 2011–5071, 118 p. [Link]

Provoost J., Tillman, F.D, Weaver, J., Reijnders, L., Bronders, J., Van Keer, I., and Swartjes, F., 2011, Vapour Intrusion into Buildings – A Literature Review, in Daniels J.A. (Ed.), Advances in Environmental Research, volume 5:  Nova Science Publishers Inc., New York, ISBN 978-1-61668-744-1, p. 69–111.  [Link]

Bills, D.J., Brown, K.M., Alpine, A.E., Otton, J.K., Van Gosen, B.S., Hinck, Jo Ellen, and Tillman, F.D, 2011, Breccia-pipe uranium mining in northern Arizona; estimate of resources and assessment of historical effects.  U.S. Geological Survey Fact Sheet 2010-3050, 4 p. [Link]

Bartelt-Hunt, S.L., Olson, M.S., and Tillman, F.D, 2010, Advective-diffusive transport processes for chemicals in surface soils:  Part 2 in Chapter 8 Mass Transfer within Surface Soils in Thibodeaux, L.J., and Mackay, D., eds., Handbook of Chemical Mass Transport in the Environment:  CRC Press, Florida, p. 187–211.  [Link]

Tillman, F.D and Leake, S.A., 2010, Trends in groundwater levels in wells in the active management areas of Arizona, USA.  Hydrogeology Journal, 18, no. 6, p. 1515–1524. [Link]

Tillman, F.D, 2010, Concentration of 1,4-dioxane in wells sampled during 2002–2009 in the vicinity of the Tucson International Airport Area Superfund Site, Arizona.  U.S. Geological Survey Scientific Investigations Map 3113, scale 1:7,500 and database.  [Link]

Bills, D.B., Tillman, F.D, Anning, D.W., Antweiler, R.C., and Kraemer, T.K., 2010, Historical and 2009 water chemistry of wells, perennial and intermittent streams, and springs in Northern Arizona, in Alpine, A.E., ed., 2010, Hydrological, geological, and biological site characterization of breccia pipe uranium deposits in northern Arizona.  U.S. Geological Survey Scientific Investigations Report 2010–5025, 353 p., 1 pl., scale 1:375,000.  [Link]

Tillman, F.D, 2009, Results of the analyses for 1,4-dioxane of groundwater samples collected in the Tucson Airport Remediation Project area, south-central Arizona, 2006–2009.  U.S. Geological Survey Open-File Report 2009-1196, 14 p.  [Link]

Tillman, F.D, 2009, Excel® spreadsheet tools for analyzing groundwater level records and displaying information in ArcMap™. U.S. Geological Survey Techniques and Methods 4-F1, 59 p.  [Link]

Tillman, F.D, Leake, S.A., Flynn, M.E., Cordova, J.T., Schonauer, K.T., and Dickinson, J.E., 2008, Methods and indicators for assessment of regional ground-water conditions in the southwestern United States.  U.S. Geological Survey Scientific Investigations Report 2008–5209, 22 p. [Link]

Tillman, F.D and Leake, S.A., 2008, A visual representation of trends in groundwater conditions.  Southwest Hydrology, January/February, p. 8-9. [Link]

Tillman, F.D, Leake, S.A., Flynn, M.E., Cordova, J.T., and Schonauer, K.T., 2007, An online interactive map service for displaying ground-water conditions in Arizona.  U.S. Geological Survey Open-File Report 2007–1436, 16 p.  [Link]

Tillman, F.D and Weaver, J.W., 2007, Parameter sets for upper and lower bounds on soil-to-indoor-air contaminant attenuation predicted by the Johnson and Ettinger vapor intrusion model.  Atmospheric Environment, 41, no. 27, p. 5797–5806.  [Link]

Tillman, F.D and Weaver, J.W., 2007, Temporal moisture content variability beneath and external to a building and the potential effects on vapor intrusion risk assessment.  Science of the Total Environment, 379, no. 1, p. 1-15. [Link]

Tillman, F.D and Weaver, J.W., 2006, Uncertainty from synergistic effects of multiple parameters in the Johnson and Ettinger (1991) vapor intrusion model.  Atmospheric Environment, 40, no. 22, p. 4098–4112.  [Link]

Tillman, F.D and Weaver, J.W., 2005, Review of recent research on vapor intrusion.  U.S. Environmental Protection Agency Publication No. EPA/600/R-05/106, 40 p.  [Link]

Weaver, J.W. and Tillman, F.D, 2005, Uncertainty and the Johnson-Ettinger model for vapor intrusion calculations.  U.S. Environmental Protection Agency Publication No. EPA/600/R-05/110, 43 p.  [Link]

Tillman, F.D and Smith, J.A., 2005, Vapor transport in the unsaturated zone, in Lehr, J.H., and Keely, J., eds., Water Encyclopedia: Ground Water. New Jersey, John Wiley & Sons, p. 543–548.  [Link]

Tillman, F.D and Smith, J.A., 2005, Site characteristics controlling airflow in the shallow unsaturated zone at Picatinny Arsenal, NJ.  Environmental Engineering Science, 22, no. 1, p. 25–37.  [Link]

Tillman, F.D, Bartelt-Hunt, S.L., Craver, V.A, Smith, J.A., and Alther, G.R., 2005, Relative metal ion sorption on natural and engineered sorbents:  Batch and column studies.  Environmental Engineering Science, 22. no. 3, p. 400–410. [Link]

Alther, G.R., Tillman, F.D, and Smith, J.A., 2005, Evaluation of Two Organoclays, Clinoptilolite, and Hydroxy-Apatite as Sorbents for Heavy Metal Removal from Water, in Calabrese E.J., Kostecki P.T., Dragun J. (eds) Contaminated Soils, Sediments and Water. Springer, Boston, MA, p. 457–468. [Link]

Tillman, F.D, Bartelt-Hunt, S.L., Smith, J.A., and Alther, G.R., 2004, Evaluation of an organoclay, an organoclay-anthracite blend, clinoptilolite, and hydroxy-apatite as sorbents for heavy metal removal from water.  Bulletin of Environmental Contamination and Toxicology, 72, no. 6, p. 1134–1141.  [Link]

Tillman, F.D and Smith, J.A., 2004, Design and laboratory testing of a chamber device to measure total flux of volatile organic compounds from the unsaturated zone under natural conditions.  Journal of Contaminant Hydrology, 75, no. 1-2, p. 71–94.  [Link]

Tillman, F.D, Choi, J.-W., and Smith, J.A., 2003, A comparison of direct measurement and model simulation of total flux of volatile organic compounds from the subsurface to the atmosphere under natural field conditions.  Water Resources Research, 39, no. 10, p. 1284–1294.  [Link]

Tillman, F.D, 2003, Design and testing of a chamber device to measure total flux of volatile organic compounds from the unsaturated zone under natural conditions.  Charlottesville, University of Virginia, Ph.D. dissertation, 130 p.

Choi, J.-W., Tillman, F.D, and Smith, J.A, 2002, Relative Importance of Gas-Phase Diffusive and Advective Trichloroethene (TCE) Fluxes in the Unsaturated Zone under Natural Conditions.  Environmental Science and Technology, 36, no. 14, p. 3157–3164.  [Link]

Olson, M.S., Tillman, F.D, Choi, J.-W., and Smith, J.A., 2001, Comparison of three techniques to measure unsaturated-zone air permeability at Picatinny Arsenal, New Jersey.  Journal of Contaminant Hydrology, 53, no. 1-2, p. 1–19.  [Link]

Tillman, F.D, Choi, J.-W., Katchmark, W., Smith, J. A., and Wood, H.G.III, 2001, Unsaturated-zone airflow:  Implications for natural remediation of ground water by contaminant transport through the subsurface, in Smith, J.A., and Burns, S.E., eds., Physicochemical Groundwater Remediation.  New York, Kluwer Academic/Plenum Publishing, ISBN 978-0-306-46928-2, p. 307–340.  [Link]