Working under the direction of John Hoffman at the United States Geological Survey, Tucson, Matt (shown in orange) used temperature measurements to estimate recharge to the aquifer underlying Tucson from an ephemeral river bed.  Matt was awarded first place for a presentation at the University of Arizona Graduate and Professional Student Council's Student Showcase, 1999.  He also received the STAR award from the Department of the Interior, 1999-2000, and the 2000 Student Scholarship from the Arizona Hydrological Society.

After graduating from Tennessee Tech with majors in geology and biology, Frank worked with the USGS in Cajun country and wrestled gators in the fetid swamps of Florida in his spare time.  This experience has served him well; he now wrestles a Lacoste and Romberg gravity meter (victory has proved elusive).  Frank is working under the direction of Don Pool and John Hoffmann at the USGS in Tucson studying the practical constraints on temporal gravity monitoring using a coupled unsaturated water flow and gravimeter response model. 

Working with the United States Geological Survey, Tucson, under the direction of John Hoffman, Kyle has instrumented a trench in the Rillito River with probes to monitor temperature, water content and scour to quantify infiltration at the onset and following stream flow.  His dissertation will address the transient processes of water and sediment movement in ephemeral channels.  Kyle earned two B.Sc. degrees and an M.Sc. from MIT and spent four years working as a bioenvironmental engineer in the Air Force.  He is a recipient of the NASA Space Grant fellowship and eagerly awaits recognition for his many discoveries including: the aquaduct, the washing machine, and the Labrador retriever.

Following a B.A. in French and Fine Arts, concentration in thee-ayter, at Georgetown University, James earned a B.S. in Environmental Science and a B.A. in Chemistry at the University of Arizona.  James is investigating the use of surface and borehole electromagnetic methods to estimate soil hydraulic parameters and rates of natural streambed recharge.  His study area is located in the Sierra Vista Subwatershed of the Upper San Pedro River Basin, AZ. James received an EPA Fellowship for his first three years of graduate study and is now employed at the United States Geological Survey, Tucson.  At the USGS, James works under the direction of Don Pool and Alissa Coes.
 

Working under the direction of Stan Leake at the United States Geological Survey, Tucson, and Randy Hanson, United States Geological Survey, San Diego, Jesse is using basin scale numerical models to investigate the basin properties that affect the preservation of climatic signals in groundwater levels. 

Charles showed that deep temperature profiles measured before and after an infiltration event could be used to estimate the infiltration rate.  He used this method to investigate recharge processes through deep vadose zones in the Tucson Basin.  His work was a Special Initiatives Project under the direction of John Hoffman at the United States Geological Survey, Tucson.

Gavin conducted a reconnaissance assessment of the water resources in the area of Kingman, AZ, under the cosupervision of Pete Hawkins.  His work is bringing together disparate sources of hydrologic and geologic information to form a useable framework for water-related decision making.  (Shown conducting hands-on field work.)  His thesis will focus on a novel method of characterizing active vegetation from satellite imagery.

Having failed miserably at his primary focus, training his dog, Alex has decided to focus his efforts on two academic pursuits under the cosupervision of Art Warrick:  1) developing and applying numerical and analytical solutions to investigate and improve performance of geophysical methods; and 2) modeling the fertigation process for different irrigation types based on analyses of flow, fate, and transport at and below the ground surface. Alex earned his B.Sc. and M.Sc. degrees from the department of Agricultural Engineering at the Technion, Israel.

Under the co-supervision of Jim Shuttleworth, Chawn is developing new time domain transmission techniques for the measurement of the water storage in plant canopies and saline soils.

Andrew comes to Arizona from Vancouver (that's in CANADA) with a strong practical background in environmental applications of geophysics to hydrogeology.  He completed his B.Sc. at the University of Waterloo (also in CANADA) and worked an environmental engineering firm for four years (based in CANADA).  Working under the SAHRA program with cosupervision provided by Art Warrick, Andrew is conducting coupled geophysical and hydrologic numerical modeling and field experiments to optimize the electrical resistivity method for monitoring transient hydrologic processes.  Andrew finds copious free time to enjoy canoeing (even in AZ), hiking, and biking.

Working under the supervision of Stan Leake, at the United States Geological Survey, Tucson, David used shallow temperature probes to better define the location and extent of intermittent reaches along the San Pedro River.

Lizz received a B.S. from ASU (the OTHER university), but we don't hold that against her.  She is completing a study of the water resources of the Upper Agua Fria Watershed, AZ.  Her thesis research will focus on completing a quantitative water balance of the Verde Valley, AZ.

While working full-time for the City of Tucson, Karen developed a new method to determine the dependence of the dielectric permittivity of municipal refuse on its water content.  The resulting calibrations will be used to improbe the application of borehole ground penetrating radar and time domain reflectometry to landfill water content monitoring.

Working under the direction of Don Pool and Alissa Coes at the United States Geological Survey, Tucson, Anastasia is conducting a detailed set of physical property measurements on intact soil cores.  These data will allow for the testing of existing pedotransfer functions on desert soils.

Dale is examining the spatial sensitivity of borehole ground penetrating radar for water content profiling.  He has conducted a highly instrumented field experiment to compare the responses of several indirect methods for monitoring the advance of a wetting front.  In addition, he is developing improved methods for GPR analysis.

Gerd is investigating the use of borehole ground penetrating radar to monitor water movement during the operation of a pumping well in a riparian area.  Gerd's work under the SAHRA program is being conducted in collaboration with a project directed by Tom Maddock and Kate Baird.

Kelly conducted long-term borehole ground penetrating radar measurements and assisted with the construction of a field site for the comparison of vadose zone monitoring methods.  She now works at the USGS as a student intern.

Jeff is using historical flow data in conjunction with current measurements of infiltration to estimate changes in streambed recharge in Rillito Creek over the past 50 years.  Jeff's work is being conducted under the Honors Undergraduate Research Program.

Eileen compared the responses of three moisture measurement techniques as part of a study of the movement of water and heat through surface mulches led by Don Post in the Department of Soil, Water and Environmental Studies.

Working together with Kyle Blasch, Leo developed a simple, robust instrument to identify periods of flow in ephemeral streams.  Under the NASA Space Grant program, Leo presented his findings at  the 2001 American Geophysical Union Fall Meeting.

Brandon used repeated surface ground penetrating radar measurements over a buried pipe to quantify drainage in streambeds following surface flow.  Brandon's work was conducted, in part, under the Honors Undergraduate Research Program.

Working under the direction of Nigel Livingston at the University of Victoria, Marija is studying the response of specially-designed TDR probes for the measurement of leaf water content for her undergraduate thesis.  She has also conducted laboratory experiments to investigate the frequency-dependence of TDR instruments in saline soils.  (Bill Hook in background.)

Under the Honors Undergraduate Research Program, Warren used repeated surface ground penetrating radar measurements over a buried pipe to quantify drainage in streambeds following surface flow.  He also customized laboratory equipment for automated monitoring.

Sander spent two weeks in Tucson in 2001 as a visiting scholar from Amsterdam, The Netherlands.  While in Tucson, he investigated the effects of TDR probe designs on frequency domain measurements of soil properties.  He also studied the effects of dielectric mixing models on the uniqueness of water content estimates based on GPR ground wave measurements. 

John visited Tucson in 2000 and 2002 to continue his work on the analysis of the spatial sensitivity of TDR to lateral variations in dielectric permittivity and electrical conductivity. 

Henrik spent four months in Tucson in 1999 as a visiting scholar from Aalborg, Denmark.  While in Tucson, he combined his experience with the design of TDR probes with numerical modeling of probe sensitivity and sample area to better define the responses of TDR probes in challenging environments.

Martha earned a B.S. in Geological sciences at Michigan State University, and then fled the cold midwest to complete an M.S. and Ph.D. in Hydrology and Water Resources at The University of Arizona.  Her M.S. thesis and Ph.D. dissertation research both utilized numerous vadose zone field methods.  She is currently working with Ty Ferre, Bart Nijssen, and Jim Washburne on the GLOBE Soil Moisture Project.  This project aims to mobilize thousands of GLOBE-affiliated schools  worldwide to collect soil moisture data that is useful to global climate modelers.  Martha is studying the potential error of various soil moisture measurement methods, assisting in the soil moisure measurement training of GLOBE teachers, and is working with global climate models and modelers to improve GLOBE soil moisutre data collection strategies.