Fred D Tillman, Jr., Ph.D.
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.
Fred's current projects include investigating potential changes in groundwater recharge under projected climate change in the Colorado River basin and understanding the potential for uranium mining effects 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. 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 and Certifications
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
Science and Products
Managing salinity in Upper Colorado River Basin streams: Selecting catchments for sediment control efforts using watershed characteristics and random forests models
Changes in projected spatial and seasonal groundwater recharge in the upper Colorado River Basin
Geochemical characterization of groundwater discharging from springs north of the Grand Canyon, Arizona, 2009–2016
Geochemistry and hydrology of perched groundwater springs: assessing elevated uranium concentrations at Pigeon Spring relative to nearby Pigeon Mine, Arizona (USA)
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
A case study on evaluating impacts of potential climate change on groundwater resources: Groundwater recharge in the Upper Colorado River Basin
Changes in groundwater recharge under projected climate in the upper Colorado River basin
Investigation of total and hexavalent chromium in filtered and unfiltered groundwater samples at the Tucson International Airport Superfund Site
Initial characterization of the groundwater system near the Lower Colorado Water Supply Project, Imperial Valley, California
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
Documentation of input datasets for the soil-water balance groundwater recharge model of the Upper Colorado River Basin
The Effect of modeled recharge distribution on simulated groundwater availability and capture
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Managing salinity in Upper Colorado River Basin streams: Selecting catchments for sediment control efforts using watershed characteristics and random forests models
Changes in projected spatial and seasonal groundwater recharge in the upper Colorado River Basin
Geochemical characterization of groundwater discharging from springs north of the Grand Canyon, Arizona, 2009–2016
Geochemistry and hydrology of perched groundwater springs: assessing elevated uranium concentrations at Pigeon Spring relative to nearby Pigeon Mine, Arizona (USA)
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
A case study on evaluating impacts of potential climate change on groundwater resources: Groundwater recharge in the Upper Colorado River Basin
Changes in groundwater recharge under projected climate in the upper Colorado River basin
Investigation of total and hexavalent chromium in filtered and unfiltered groundwater samples at the Tucson International Airport Superfund Site
Initial characterization of the groundwater system near the Lower Colorado Water Supply Project, Imperial Valley, California
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
Documentation of input datasets for the soil-water balance groundwater recharge model of the Upper Colorado River Basin
The Effect of modeled recharge distribution on simulated groundwater availability and capture
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.