Steven Phillips

Biography

My work involves using simulation models to better understand hydrologic systems and developing tools to help manage these systems.  Ongoing projects include (1) developing a water management optimization model of the Modesto region to help evaluate management alternatives for a group of six water providers and users; and (2) developing a seepage management plan for the San Joaquin River Restoration Program.  Most of my career has been addressing issues related to irrigated agriculture in the San Joaquin Valley, and artificial recharge, land subsidence, and public water-supply issues in Antelope Valley, California.

 

2009 – San Joaquin River Restoration Program:  Responsible for developing a Seepage Management Plan for the San Joaquin River Restoration Program, which is designed to restore the salmon run.

 

2008-present – Part-time Groundwater Specialist for the California Water Science Center

 

2005-present – Cooperator Stanislaus-Tuolumne Rivers Groundwater Basin Association (Modesto & Oakdale Irrigation Districts; Cities of Modesto, Oakdale and Riverbank; and Stanislaus County):Project Chief for development of a simulation/optimization model to explore water management alternatives under various future hydrologies, including the effects of climate variability and change.

 

2002-2007 – NAWQA: Work included collection and analysis of  hydraulic, temperature, geodetic, and chemical data from the unsaturated, saturated, and hyporheic zones; and development of regional- and local-scale coupled models.

 

1999-2004 – Cooperator USBR: Project Chief for development of a groundwater flow model to assess the effects of climatic extremes on the quantity and quality of subsurface drainflow in the western San Joaquin Valley.

 

1995-2002 – Cooperators Los Angeles Co. Dept. of Public Works and Antelope Valley-East Kern Water Agency: Project Chief for pilot study of injection, storage, and extraction of drinking water in Lancaster, Antelope Valley, CA.  Involved collection and analysis of water-level (incl. using microgravity), aquifer-system deformation (extensometers, continuous GPS, leveling, and InSAR), water chemistry, and other data. Developed a simulation/optimization model for use in planning and managing a larger-scale injection program to enhance water resources and mitigate future land subsidence.

 

1992-95 – Cooperator Antelope Valley Water Group:  Work involved measuring land subsidence, characterizing land and water use, and developing a transient model of groundwater flow and land subsidence. 

 

1991-92 – Cooperator San Francisco Water Department: Involved a geohydrologic characterization of San Francisco, including basin delineation and characterization, and development of a soil moisture budget model to estimate groundwater recharge given land-use characteristics, rainfall, irrigation, water pipe and sewer leakage, etc. 

 

1988-91 – Cooperator SWRCB: Estimated groundwater inflow to a 19-mile reach of the San Joaquin River and associated constituent loads.  The approach combined synoptic surface-water measurements, groundwater chemistry profiles, and cross-sectional flow models of three sites. 

 

1985-92 – San Joaquin Valley Drainage Program: Work involved developing steady-state and transient regional groundwater flow models to generate a greater understanding of the flow system in the western San Joaquin Valley, and to evaluate alternatives to agricultural drains for managing the shallow, saline groundwater underlying prime agricultural land.

 

 

 

 

 

 

Publications

Phillips, Steven P.; Green, Christopher T.; Burow, Karen R.; Shelton, Jennifer L.; Rewis, Diane L., 2007. Simulation of Multiscale Ground-Water Flow in Part of the Northeastern San Joaquin Valley, California. Geological Survey (U.S.) Scientific Investigations Report 2007-5009, viii, 43 p. [Link]

Brush, Charles F.; Belitz, Kenneth; Phillips, Steven P., 2004. Estimation of a water budget for 1972-2000 for the Grasslands Area, central part of the Western San Joaquin Valley, California. Scientific Investigations Report 2004-5180, 59 p. [Link]

Howle, James F.; Phillips, Steven P.; Denlinger, Roger P.; Metzger, Loren F., 2003. Determination of specific yield and water-table changes using temporal microgravity surveys collected during the second injection, storage, and recovery test at Lancaster, Antelope Valley, California, November 1996 through April 1997. Water-Resources Investigations Report 2003-4019, 28 p. [Link]

Leighton, David A.; Phillips, Steven P., 2003. Simulation of ground-water flow and land subsidence in the Antelope Valley ground-water basin, California. Water-Resources Investigations Report 2003-4016, 118 p. [Link]

Phillips, Steven P.; Carlson, Carl S.; Metzger, Loren F.; Howle, James F.; Galloway, Devin L.; Sneed, Michelle; Ikehara, Marti E.; Hudnut, Kenneth W.; King, Nancy E., 2003. Analysis of Tests of Subsurface Injection, Storage, and Recovery of Freshwater in Lancaster, Antelope Valley, California. Water-Resources Investigations Report 2003-4061, 122 . [Link]

Carlson, Carl S.; Phillips, Steven P., 1998. Water-level changes (1975-1998) in the Antelope Valley ground-water basin, California. Open-File Report 98-561, 2 over-size sheets,

Carlson, Carl S.; Leighton, David A.; Phillips, Steven P.; Metzger, Loren F., 1998. Regional water table (1996) and water-table changes in the Antelope Valley ground-water basin, California. Water-Resources Investigations Report 98-4022, 2 maps on 2 sheets : col. ; 58 x 77 cm., sheets 122 x 92 cm., folded in envelope 30 x 23 cm.

Belitz, Kenneth; Phillips, Steven P.; Gronberg, Jo Ann M. , 1993. Numerical simulation of ground-water flow in the central part of the western San Joaquin Valley, California. U.S. G.P.O. ; For sale by the Books and Open-File Reports Section, U.S. Geological Survey, Water Supply Paper 2396, vi, 69 p. :ill., maps ;28 cm.

 

Complete List of Publications

First-authored reports, papers, articles

Phillips, S.P., and Galloway, D.L., 2007, Groundwater pumping and land subsidence, in Stewart, B.A. and Howell, T.A., eds., Encyclopedia of Water Science, Marcel Dekker, Inc., New York.

Phillips, S.P., Green, C.T., Burow, K.R., Shelton, J.L., and Rewis, D.L., 2007, Simulation of multiscale ground-water flow in part of the northeastern San Joaquin Valley, California: US Geological Survey Scientific Investigations Report 2007-5009, 43 p.

Phillips, S.P., Burow, K.R., Rewis, D.L., Shelton, J.L., and Jurgens, B.C., Hydrogeologic Setting and Ground-water Flow Simulations of the San Joaquin Valley Regional Study Area, California, in Paschke, S.S., ed., 2006, Hydrogeologic settings and ground-water flow simulations for regional studies of the transport of anthropogenic and natural contaminants to public-supply wells – Studies begun in 2001:  U.S. Geological Survey Professional Paper 1737-A.

Phillips, S.P., Carlson, C.S., Metzger, L.F., Howle, J.F., Galloway, D.L., Michelle Sneed, Ikehara, M.E., Hudnut, K.W., and King, N.E., 2003, Analysis of tests of subsurface injection, storage, and recovery of freshwater in Lancaster, Antelope Valley, California: U.S. Geological Survey Water-Resources Investigations Report 03-4061, 122 p.

Phillips, S.P., 2003, Aquifers, artificial recharge of, in Stewart, B.A. and Howell, T.A., eds., Encyclopedia of Water Science, Marcel Dekker, Inc., New York, p. 33-36

Phillips, S.P., Carlson, C.S., Metzger, L.F., Howle, J.F., Galloway, D.L., Michelle Sneed, Ikehara, M.E., Hudnut, K.W., and King, N.E., 2003, Analysis of tests of subsurface injection, storage, and recovery of freshwater in Lancaster, Antelope Valley, California: U.S. Geological Survey Water-Resources Investigations Report 03-4061, 122 p.

Phillips, S.P., Carlson, C.S., Metzger, L.F., Sneed, M., Galloway, D.L., Hudnut, K.W., and Ikehara, M.E., 2002, Optimal management of an ASR program to control land subsidence in Lancaster, California, in Dillon, P.J., ed., Management of aquifer recharge for sustainability: Proceedings of the 4th International Symposium on Artificial Recharge of Groundwater, ISAR-4, Adelaide, South Australia, September 22-26, 2002, p. 361-366.

Phillips, S.P., 2002, The role of saturated flow in artificial recharge projects, in U.S. Geological Survey Artificial Recharge Workshop Proceedings, Sacramento, California, April 2-4, 2002, p. 16-19.

Phillips, S.P., Hamlin, S.N., and Yates, E.B., 1993, Geohydrology, water quality, and estimation of ground-water recharge in San Francisco, California, 1987-92: U.S. Geological Survey Water-Resources Investigations Report 93-4019, 69 p.

Phillips, S.P., and Belitz, Kenneth, 1991, Calibration of a texture-based model of a ground water flow system, western San Joaquin Valley, California: Ground Water, v.29, no. 5, p. 702-715.

Phillips, S.P., Beard, Sherrill, and Gilliom, R.J.,1991, Quantity and quality of ground-water inflow to the San Joaquin River, California: U.S. Geological Survey Water-Resources Investigations Report 91-4019, 64 p.

Phillips, S.P., 1988, Calibration of a texture-based simulation of the ground-water flow system in the western San Joaquin Valley, California: MS Geology thesis, San Jose State University, 142 p.

 

First-author conference papers, abstracts

Phillips, S.P., Carlson, C.S., Sneed, Michelle, Galloway, D.L., Ikehara, M.E., Metzger, L.F., and Hudnut, K.W., 2008, Optimal Management of an Aquifer Storage and Recovery (ASR) Program in a Subsidence Area, Lancaster, California: in Proceedings of the 2008 Joint Annual Meeting, October 5-9, 2008, Houston, Texas.

Phillips, S.P., Carlson, C.S., Sneed, Michelle, Galloway, D.L., Ikehara, M.E., Metzger, L.F., and Hudnut, K.W., 2008, Optimal Management of an Aquifer Storage and Recovery (ASR) Program in a Subsidence Area, Lancaster, California: in Proceedings of the Groundwater Resources Association Symposium on Applications of Optimization, October 16, 2008, Sacramento, California.

Phillips, S.P., Flint, A.L., Flint, L.E., and Hanson, R.T., 2008, Simulated effects of climate change on surface water availability and groundwater conditions in the agriculturally dominated Modesto region, California: Proceedings of the Groundwater Resources Association Symposium on Climate Change: Implications for California Groundwater Management, August 13, 2008, Sacramento, California.

Phillips, S.P., and Green, C.T., 2008, Modeling spatial heterogeneity in aquifers using process-informed models (TProGS): U.S. Geological Survey National Ground-Water Workshop, August 4-8, 2008, Denver, Colorado.

Phillips, S.P., 2008, Development of Regional and Nested Local-Scale Ground-Water Models for Study of the Fate of Agricultural Nitrogen, Merced County, California: Proceedings of the California Central Valley Groundwater Modeling Workshop, July 11, 2008, Berkeley, California, p. 21-22.

Phillips, S.P., Bayless, Randall, and Zamora, Celia, 2006, Estimation of unsaturated and saturated flow from an irrigated orchard to the Merced River, California: Eos Trans. AGU, 87(52), Fall Meeting Supplement, Abstract H11A-1235.

Phillips, S.P., Green, C.T., and Zamora, Celia, 2006, Development of nested, heterogeneous ground-water flow models for study of transport and fate of agricultural chemicals, Merced County, California: in Meeting Program, 2006 Joint Assembly of the American Geophysical Union, May 23-26, Baltimore, Maryland, p. 89.

Phillips, S.P., Howle, J.F., Metzger, L.F., and Galloway, D.L., 2003, Techniques used to monitor an aquifer storage and recovery program, Lancaster, California, in Proceedings of Artificial recharge in California – technical and policy challenges, April 30 – May 1, 2003, San Jose, California, 1p.

Phillips, S.P., 2002, The role of saturated flow in artificial recharge projects, in U.S. Geological Survey Artificial Recharge Workshop Proceedings, Sacramento, California, April 2-4, 2002, p. 16-19.

Phillips, S.P., Carlson, C.S., Metzger, L.F., Sneed, M., Galloway, D.L., Hudnut, K.W., and Ikehara, M.E., 2002, Optimal management of an ASR program to control land subsidence in Lancaster, California, in Dillon, P.J., ed., Management of aquifer recharge for sustainability: Proceedings of the 4th International Symposium on Artificial Recharge of Groundwater, ISAR-4, Adelaide, South Australia, September 22-26, 2002, p. 361-366.

Phillips, S.P., Galloway, D.L., Metzger, L.F., Howle, J.F., Rewis, D.L., Ikehara, M.E., and Hudnut, K.W., 1997, Aquifer-system response to injection, Lancaster, California: American Water Resources Association Annual Conference, Long Beach, Calif., October 19-23, 1997. (It was erroneously omitted from the program).

Phillips, S.P., 1995, Land subsidence as a resource management objective in Antelope Valley, California, in Prince, K.R., Galloway, D.L., and Leake, S.A., U.S. Geological Survey subsidence interest group conference, Edwards Air Force Base, Antelope Valley, California, November 18-19, 1992: Abstracts and summary: U.S. Geological Survey Open-File Report 94-532, p. 44-45.

Phillips, S.P., Beard, Sherrill, and Gilliom, R.J.,1991, Estimation of the quantity and quality of ground-water inflow to the San Joaquin River, California: Eos, Transactions of the American Geophysical Union, Program and Abstracts, v. 72, no. 44, Supplement, p. 168.

Phillips, S.P., and Belitz, Kenneth, 1988, Calibration of a texture-based model of a ground-water flow system, western San Joaquin Valley, California: Eos, Transactions of the American Geophysical Union, Abstracts, v. 69, no. 44, p. 1188.

Co-authorships

Domagalski, J., Phillips, S., Bayless, R., Zamora, Celia, Kendall, C., Wildman, R., Hering, J., 2008, Influences of the Unsaturated, Saturated, and Riparian Zones on the Transport of Nitrate Near the Merced River, California: Hydrogeology Journal, Vol. 16, No. 4, p. 675-690.

Burow, K.R., Jurgens, B.C., Kauffman, L.J. Phillips, S.P., Dalgish, B.A., and Shelton, J.L., 2008, Simulations of ground-water flow and particle pathline analysis in the zone of contribution of a public-supply well in Modesto, eastern San Joaquin Valley, California: U.S. Geological Survey Scientific Investigations Report 2008–5035, 41 p.

Zamora, Celia, Kratzer, C.R., Phillips, S.P., and Dileanis, P.D., 2008, Estimating ground water accretions to the lower San Joaquin River, California using heat flux and MODFLOW: in Proceedings of the 5th Biennial CALFED Science Conference on Global Perspectives and Regional Results: Science and Management in the Bay-Delta System, October 22-24, 2008, Sacramento, California.

Green, C.T., Pucket, L.J., Böhlke, J.K., Bekins, B.A., Phillips, S.P., Kauffman, L.J., Denver, J.M., and Johnson, H.M., 2008, Limited occurrence of denitrification in four shallow aquifers in agricultural areas of the United States: Journal of Environmental Quality, Vol. 37, No. 3, p. 994-1009.

Weissmann, G.S., Lansdale, A.L., Phillips, S.P., Burow, K.R., 2006, Regional-scale influence of large incised-valley fill deposits on groundwater flow; in Proceedings of the Gordon Conference, Summer 2006.

Green, C.T., and Phillips, S.P., 2005, Modeling of reactive transport of nitrate in a heterogeneous alluvial fan aquifer, San Joaquin Valley, California: Eos Trans. AGU, 86(52), Fall Meet. Supplement, Abstract H11D-1300.

Brush, C.F., Belitz, Kenneth, and Phillips, S.P., 2004, Estimation of a water budget for 1972-2000 for the Grasslands Area, central part of the western San Joaquin Valley, California: U.S. Geological Survey Scientific Investigations Report 2004-5180, 51 p.

Howle, J.F., Phillips, S.P., Denlinger, R.P., and Metzger, L.F., 2003, Determination of specific yield and water-table changes using temporal microgravity surveys collected during the second injection storage and recovery test at Lancaster, Antelope Valley, California, November 1996 through April 1997: U.S. Geological Survey Water-Resources Investigations Report 03-4019, 28 p.

Leighton, D.A., and Phillips, S.P., 2003, Simulation of Ground-Water Flow and Land Subsidence in the Antelope Valley Ground-Water Basin, California: U.S. Geological Survey Water-Resources Investigations Report 03-4016, 107 p.

Howle, J.F., Phillips, S.P., and Ikehara, M.E., 2002, Estimating water-table change using microgravity surveys during an ASR program in Lancaster, California, in Dillon, P.J., ed., Management of aquifer recharge for sustainability: Proceedings of the 4th International Symposium on Artificial Recharge of Groundwater, ISAR-4, Adelaide, South Australia, September 22-26, 2002, p. 269-272.

Carlson, C.S., Leighton, D.A., Phillips, S.P., and Metzger, L.F., 1998, Regional water-table (1996) and water-table changes in the Antelope Valley Ground-Water Basin, California: U.S. Geological Survey Water-Resources Investigations Report 98-4022, 2 pl.

Carlson, C.S., and Phillips, S.P., 1998, Water-level changes (1975-98) in the Antelope Valley, California: U.S. Geological Survey Water-Resources Investigations Report 98-561, 2 pl.

Galloway, D.L., Phillips, S.P., and Ikehara, M.E., 1998, Land subsidence and its relation to past and future water supplies in Antelope Valley, California, in Borchers, J.W., ed., Land subsidence case studies and current research – Proceedings of the Dr. Joseph F. Poland Symposium on land subsidence, October 4-5, Sacramento, California, p. 529-539.

Galloway, D.L., Hudnut, K.W., Ingebritsen, S.E., Phillips, S.P., Peltzer, G., Rogez, F., and Rosen, P.A., 1998, Detection of aquifer system compaction and land subsidence using interferometric synthetic aperture radar, Antelope Valley, Mojave Desert, California: Water Resources Research, Vol. 34, No. 10, p. 2573-2585.

Belitz, Kenneth, and Phillips, S.P., 1995, Alternative to agricultural drains in California’s San Joaquin Valley: Results of a regional-scale hydrogeologic approach: Water Resources Research, Vol. 31, No. 8, p. 1845-1862.

Templin, W.E., Phillips, S.P., Cherry, D.E., DeBortoli, M.L., and others, 1995, Land use and water use in the Antelope Valley, California: U.S. Geological Survey Water-Resources Investigations Report 94-4208, 97 p.

Ikehara, M.E., and Phillips, S.P., 1994, Determination of land subsidence related to ground-water-level declines using global positioning system and leveling surveys in Antelope Valley, Los Angeles and Kern Counties, California: U.S. Geological Survey Water-Resources Investigations Report 94-4184, 101 p.

Belitz, Kenneth, and Phillips, S.P., 1994, Simulation of water-table response to management alternatives, central part of the western San Joaquin Valley, California: U.S. Geological Survey Water-Resources Investigations Report 91-4193, 41 p.

Belitz, Kenneth, Phillips, S.P., and Gronberg, J.M., 1993, Numerical simulation of ground-water flow in the central part of the western San Joaquin Valley, California: U.S. Geological Survey Water-Supply Paper 2396, 69 p.

Beard,  Sherrill, Phillips, S.P., and Gilliom, R.J., 1991, Estimation of the constituent load of groundwater inflow to the San Joaquin River, California: EOS, Transactions of the American Geophysical Union, Program and Abstracts, Supplement, v. 72, no. 44, p. 187.

Belitz, Kenneth, Phillips, S.P., and Gronberg, J.M., 1991, Numerical modeling of groundwater flow in the central part of the western San Joaquin Valley, CA: Water table response to management actions: EOS, Transactions of the American Geophysical Union, Program and Abstracts, v. 72, no. 44, Supplement, p. 176.

Michel, R.L., Hamlin, S.N., and Phillips, S.P., 1991, Tritium distributions and recharge to ground water in western San Francisco, California: Eos, Transactions of the American Geophysical Union, Program and Abstracts,v. 72, no. 44, Supplement, p. 206.

Gronberg, J.M., Belitz, Kenneth, and Phillips, S.P., 1990, Distribution of wells in the central part of the western San Joaquin Valley, California: U.S. Geological Survey Water-Resources Investigations Report 89-4158, 51 p.