Sacramento Branch Meeting-Domestic Well Supply Reliability During Drought: Stress Testing for Groundwater Overdraft and Economic Costs

The Sacramento Branch is pleased to present:

Domestic Well Supply Reliability During Drought: Stress Testing for Groundwater Overdraft and Economic Costs

Rob M. Gailey, PG, CHG
UC Davis and R.M. Gailey Consulting Hydrogeologist


Many residential wells went dry during the drought from 2012 through 2016.  This is especially true for the southern Central Valley where there is a concentration of disadvantaged communities that also experience poor water quality (nitrate, arsenic, etc.).  An analysis of impacts to residential wells during the drought is performed for Tulare County where a detailed dataset on residential wells going dry during the drought is available.  The inventory of residential wells located on the valley floor is categorized by location and screened interval depth at the resolution of one square mile.  This information is then compared to declines in groundwater levels, potential actions to maintain supply continuity (increased energy for pumping lift, pump lowering, screen rehabilitation and well replacement) are considered and costs for those actions are estimated.  The impact and cost estimation model is calibrated against information on wells that actually went dry and uncertainty in the cost estimates are evaluated. Potential for using the model to perform analysis required for groundwater sustainability plans under the Sustainable Groundwater Management Act is demonstrated.  Finally, applying the modeling approach to other areas in the Central Valley is discussed.


Rob Gailey has been a practicing hydrogeologist since 1985. His work, involving both water supply and contaminant hydrogeology, ranges from performing field investigations and quantitative analysis to regulatory negotiation and expert witness engagements. Rob recently joined the GRA Board of Directors. He earned a B.S. in Geology/Biology from Brown University, an M.S. in Applied Hydrogeology from Stanford University, and an M.B.A. from University of California Berkeley.  In addition to consulting, he is currently a Ph.D. candidate in Civil and Environmental Engineering at the University of California Davis where he conducts research on sustainable groundwater management.  Contact information:;; (415) 407-8407.


All Proceeds to Benefit Science Students

The GRA Sacramento Branch has a history of supporting university-level science students. Our Scholastic Sponsorship Program is an opportunity to publicize your business while contributing toward a good cause. The cost is minimal; if interested, please contact Linda Bond at (530) 757-1500 or


Social Hour - 5:30-6:30 p.m.
Announcements & Dinner - 6:30-7:30 p.m.
Presentation - 7:30-8:30 p.m.
Usual great food, including two meat entrées, salad, rice, potatoes, vegetable and Iced Tea. A No-host beer and wine bar will be available.


Members: $27.00
Non-Members: $32.00
Students: $10.00

  • If you register after Noon on Monday, May 7th, or walk-in, a $3.00 surcharge will be added to the meeting cost.
  • Cancellations must be made by Noon on Monday, May 7th.

If you have questions about the meeting, please telephone Rodney Fricke at 916-407-8539 or email him at  For questions about Sacramento Branch in general, including submittal of your ideas and/or desires for future presentations, please telephone Linda Bond at (530) 757-1500 or email her at


June 6th, Kirby Brill, Former General Manager of the Mojave Water Agency, Southern California David Keith Todd Lecturer (invited) in conjunction with the GRA first annual Groundwater Sustainability Agency Summit

July 11th: Chris Bonds, Senior Engineering Geologist, California Department of Water Resources, State May Atom-Blast for Water: The Plowshare Program and DWR’s Connection 

August 8th: NGWA 2018 McEllhiney lecturer Todd Halihan, Ph.D, Professor of Geology, Oklahoma State University, Chief Technical Officer for Aestus LLC, The Future of Water: Data or Instincts?

September 12th: Glenn Meek, CA State Water Resources Control Board, Update on the Central Valley Salts Program


Wed, May 9, 2018
5:30 p.m. - 8:30 p.m.

Event has ended


Aviators Restaurant
6151 Freeport Blvd
Sacramento, California 95822

Aviator's Restaurant at the Sacramento Executive Airport
6151 Freeport Blvd., Sacramento, CA
Aviator's Restaurant is located within the aircraft Terminal Building.
Plenty of free parking.