Jeffrey Kennedy, Ph.D.

Biography

My research focuses on measuring and interpreting small changes in gravity as they relate to the hydrology of alluvial basins in the southwestern U.S. Current projects focus on the hydrology of the lower Colorado River, namely the lining of the All American Canal and environmental flood releases in the Colorado River Delta related to Minute 319.

As the geophysics specialist at the Arizona Water Science Center, I oversee the the Southwest Gravity Program, a joint effort of the New Mexico and Arizona Water Science Centers to collect high-quality, hydrologically-useful repeat microgravity data throughout the western U.S. More information, including a complete bibliography, is at the Arizona Water Science Center's Gravity Webpage.

A complete list of peer-reviewed articles and reports is at the bottom of this page.

Conference abstracts and presentations

Bell, M., Kahler, L., Kennedy, J., Robertson, A., 2019, A Microgravity Pilot Study: Insights into Storage Change, Specific Yield, and Groundwater/Surface Water Interaction in the Mesilla Groundwater Basin, New Mexico. American Geophysical Union Fall Meeting, Dec. 9-13, San Francisco, CA

Kennedy, J., Van Westrum, D. 2019, Comparing approaches to network design and drift correction for relative-gravity surveys, American Geophysical Union Fall Meeting, Dec. 9-13, San Francisco, CA

Hicks, C. L., Porter, R.C., Umhoefer, P.J., Kennedy, J., Springer, A.E., 2019, Cenozoic extensional basins and their water content in the Eloy and Maricopa-Stanfield Basins: A geophysical and structural analysis. Geological Society of America Annual Meeting, Sept. 22-25, Phoenix, AZ

Kennedy, J., 2019, Using cosmic-ray soil neutron sensing to separate changes in soil moisture from aquifer-storage change in gravity data, International Union of Geodesy and Geophysics General Assembly, July 8-18, Montreal, Canada.

Ball, L, Kennedy, J., Knight, J, 2019, Hydrostratigraphic model development from ground and airborne geophysical surveys of the western Hualapai Reservation near Grand Canyon West, Arizona, AGU-SEG Airborne Geophysics Workshop, June 9-10, Davie, FL.

Rinehart, A., Kennedy, J., Cadol, D., Kelley, S., Richards, M., Stark, K., 2019, Signals of focused recharge along an ephemeral wash by repeat microgravity surveys, Arroyo de los Pinos, NM, New Mexico, New Mexico Geological Society Spring Meeting, April 12, Socorro, NM.

Kahler, L. M., Bell, M., Robertson, A., Kennedy, J., 2019, Repeat Microgravity Monitoring of Rio Grande River Seepage and Groundwater Withdrawals in the Mesilla Valley, New Mexico, New Mexico Geological Society Spring Meeting, April 12, Socorro, NM.

Kennedy, J., 2018, Hydro-gravity signals, from large to small, First workshop on the international geodynamics and Earth tide service, June 18-20, Potsdam, Germany.

Kennedy, J., Macy, J., 2017, Non-invasive water-table imaging with joint DC-resistivity/microgravity/hydrologic model inversion, AGU Fall Meeting, Dec. 11-15, New Orleans, LA, Abstract NS11A-01

Macy, J., Kennedy, J., 2017, An improved hydrogeologic conceptual model of the Big Chino Sub-basin, Central Arizona, Arizona Hydrological Society Symposium, Sept. 6-8, Flagstaff, AZ.

Kennedy, J., Bell, M., Norton, S., 2017, Using time-lapse gravity to monitor storage-change during a groundwater injection test in Albuquerque, NM, Symposium on the Application of Geophysics to Engineering and Environmental Problems (SAGEEP 2017), Denver, CO, Mar. 20-22. 

Pool, D.R., J. Kennedy, P. MacQueen, and T.M. Neibauer, 2016, Hydrologic Interpretations of Long-Term Gravity Records at Tucson, Arizona, AGU Fall Meeting, Dec. 12-16, San Francisco, CA. Abstract H42D-06.

Kennedy, J., Ramirez-Hernandez, J., and E. Rodriguez Burgueño, 2015, Experimental Floods in a Time of Drought: The 2014 Pulse Flow in the Lower Colorado River, Arizona, USA, and Mexico, AGU Fall Meeting, Abstract H21B-1356.

Kennedy, J., and Ferré, T., 2014, Too Fast to Measure: Network Adjustment of Rapidly Changing Gravity Fields: AGU Fall Meeting, Dec. 15-19, San Francisco, CA. Abstract 43C-02

Macy, J.P., Kennedy, J.R., and Callegary, J., 2014, Monitoring and modeling very large, rapid infiltration using geophysics during the 2014 Lower Colorado River pulse flow experiment: AGU Fall Meeting, Dec. 15-19, San Francisco, CA. Abstract NS41A-3830

Ferré, T.P., Kikuchi, C., Vrugt, J., Kennedy, J., and Bayley, T., 2014, Don’t use geophysics: AGU Fall Meeting, Dec. 15-19, San Francisco, CA. Abstract H43O-07

Ferré, T.P.A., Kennedy, J., Güntner, A., Abe, M., and Creutzfeldt, B., 2014, Using superconducting gravimeters as an infiltrometer: Geophysical Research Abstracts, Vol. 16, EGU2014-6373

Kennedy, J., Ferré, T.P., Abe, M., and Güntner, A., 2013, Increased accuracy through variable-baseline gradient measurements with multiple superconducting gravimeters: AGU Fall Meeting, Dec. 9–13, San Francisco, CA. Abstract G11A-0906

Kennedy, J., and Ferré, T., 2013, Newly developed gravity methods for monitoring infiltration and recharge: Arizona Hydrological Society Symposium, Sep. 18–20, Tucson, AZ.

Kennedy, J.,  Ferré, T., Creutzfeldt, B., Güntner, A., Neumeyer, J., Brinton, E., and Warburton, R., 2013, Smaller is better: first experiences using the iGrav superconducting gravimeter in a field enclosure. 17th International Symposium on Earth Tides, Apr. 1519, Warsaw, Poland.

Creutzfeldt, B., J. Kennedy, and P. A. Ferré., 2012, Water-storage change measured with high-precision gravimetry at a groundwater recharge facility in Tucson, USA (Invited): AGU Fall Meeting, Dec. 37, San Francisco, CA. Abstract NS44A-02

Kennedy, J., B. Creutzfeldt, and P.A. Ferré., 2012, Monitoring vadose zone infiltration with time-lapse gravity data at a municipal recharge and withdrawal facility (Invited): Geological Society of America annual meeting, Nov. 47, Charlotte, NC.

Kennedy, J., Creutzfeldt, B., Ferré, P.A., and Güntner, A., 2012. Gravity-measured water storage change and subsurface hydraulic properties at a managed recharge facility in Tucson, AZ (Invited): EAGE Near Surface Meeting, Sep. 35, Paris, France.

Kennedy J., Creutzfeldt B., and Ferré, T., 2012, Recent developments in the use of time-lapse gravity measurements to monitor groundwater storage change and infer aquifer properties: USGS Groundwater meeting, Aug. 6–10, Denver, CO.

Kennedy J., Creutzfeldt B., and Ferré, T., 2012, Gravity-measured water storage change and subsurface hydraulic properties at a managed recharge facility in Tucson, USA: Symposium on the Application of Geophysics to Engineering and Environmental Problems (SAGEEP 2012), Mar. 2529, Tucson, AZ.

Macy, J., Amoroso, L. Kennedy, J., and Unema, J., 2012, Depth of cinder deposits and water-storage capacity at Cinder Lake, Coconino County, Arizona: Symposium on the Application of Geophysics to Engineering and Environmental Problems (SAGEEP 2012), Mar. 2529, Tucson, AZ.

Kennedy, J., Murdoch, L., Long, A., and Koth, K., 2011, Measuring groundwater flow at the Sanford Laboratory with coupled surface/subsurface time-lapse gravity measurements (Invited): American Geophysical Union Fall Meeting, Dec. 5–9, San Francisco, CA.  Abstract NH54A-01

Kennedy, J., Pool, D., Ferré, P.A., and Wilson, C., 2011, Using high-resolution gravity and pumping data to infer aquifer parameters: American Geophysical Union Fall Meeting, Dec. 5–9, San Francisco, CA. Abstract H43E-1273

Kennedy, J., and Paretti, N., 2011, Arizona flood frequency analysis: updated tools and products: Arizona Hydrological Soc. Symposium, Sep. 1820, Flagstaff, AZ.

Truini, M., Beard, S., Kennedy, J., and Macy, J., 2011, Hydrogeologic framework and estimates of groundwater storage for the Hualapai, Detrital, and Sacramento Valleys, Arizona: Rocky Mountain (63rd Annual) and Cordilleran (107th Annual) Joint Meeting, May 1820, Salt Lake City, UT.

Pool, D.R., Kennedy, J.R., and Conway, B., 2010, Observations of the spatial and temporal distributions of gravity and water-mass change in the western United States: IGCP 565 Workshop 3–Separating Hydrological and Tectonic Signals in Geodetic Observations, Oct. 11–13, Reno, NV.

Winester, D., Pool, D., and Kennedy, J., 2010, A regional-scale network for geoid monitoring and satellite gravimetry validation: American Geophysical Union Fall Meeting, Dec. 1317, San Francisco, CA. Abstract G41A-0795

Kennedy, J., 2009, Debris flows and drought: Monitoring aquifer storage during hydrologic extremes in the upper San Pedro basin, 2000-2009: Arizona Hydrological Soc. Symposium, Aug. 30–Sep.2, Scottsdale, AZ.

Kennedy, J., 2009, Expanding the Usefulness of Existing Data-Collection Infrastructure with Wireless Sensor Networks: American Geophysical Union Fall Meeting, Dec. 1418, San Francisco, CA. Abstract IN23C-1073

Dickinson, J.E., Kennedy, J., Callegary, J., and Pool, D.R., 2009, Incorporating transient electromagnetic, gravity, and well log data for developing hydrogeologic framework and ground water models, National Groundwater Summit, April 19-23, Tucson, AZ.

Finke, T., Moran, M.S., Yool, S., and Kennedy, J. 2008, Object-Oriented Classification to Map Impervious Surfaces for Hydrologic Models: Conference of Association of American Geographers, Apr. 15–19, Boston, MA.

Carruth, R., and Kennedy, J., 2008, The Use of Gravity Methods in Arizona’s Rural Watershed Initiative Projects: American Geophysical Union Fall Meeting, Dec. 1519, San Francisco, CA. Abstract H21D-0868

Kennedy, J., and Carruth, R., 2008, The Role of Absolute Gravimetry in Arizona’s Rural Watershed Initiative Projects: Arizona Hydrological Soc. Symposium, Sep 20–24, Flagstaff, AZ.

Kennedy, J., Leenhouts, J., and Goodrich, D., 2007, Runoff generation in a suburban development: Arizona Hydrological Soc. Symposium, Aug. 29–Sep. 1, Tucson, AZ.

Kennedy, J.; Leenhouts, J.; Unkrich, C.; and Goodrich, D., 2006, Parameterization of an Urban Runoff Model, American Geophysical Union Fall Meeting, Dec. 11–15, San Francisco, CA. Abstract H43E-0534

Kennedy, J.R., Keefer, T.O., Paige, G.B., and Barnes, F. 2003. Evaluation of dielectric constant-based soil moisture sensors in a semi-arid rangeland: Proc. 1st Interagency Conf. on Research in the Watersheds, K.G. Renard, S. McElroy, W. Gburek, E. Canfield, and R.L. Scott (eds.), Oct. 27-30, Benson, AZ, pp. 503-508.