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" In Suspect Terroir: A Case Study of Complexities at a Vineyard MAR Site Along the Cosumnes River"

Presented By:

Brad Gooch, PhD., PG.

Larry Walker & Associates

 

Maribeth L. Kniffin, Ph.D.

University of California, Davis

 

 

 INTRODUCTION:

Recent and on-going efforts by Dr. Gooch and Dr. Kniffin will be presented on characterizations of subsurface conditions at a managed aquifer recharge (MAR) site along the Cosumnes River and Deer Creek floodplain near Sacramento, California. The site is both an example of Ag-MAR and flood-MAR as it is situated in the floodplain, utilizes flood water, and is a large production vineyard. In the winter of 2021, Cosumnes River water was diverted to the vineyard during a natural Deer Creek flooding event. Shortly after the flood event, they conducted geophysical surveys to characterize preferential recharge pathways at the site. Installation of a monitoring network containing a suite of sensors began in 2018 to understand baseline hydrologic and natural flood conditions, and a subsurface geologic database to illuminate potential drivers of recharge heterogeneity. Many Groundwater Sustainability Plans (GSPs) are expected to incorporate MAR to augment groundwater levels. Logistically favorable MAR sites/projects may need to leverage subsurface aquifer features to achieve desired outcomes, which will require detailed site characterization to optimize recharge vs. project costs.

 

SPEAKER BIO:

Brad T. Gooch, PhD, PG, Larry Walker Associates

Brad T. Gooch, Ph.D., P.G. is a hydrogeologist with a broad professional and educational background in geology and geophysics focused in groundwater science. Dr. Gooch is a licensed Professional Geologist in California and holds a Ph.D. in Geological Sciences from The University of Texas at Austin and both a Bachelor and Master of Science in Geology from the University of South Florida. Dr. Gooch has worked on numerous groundwater and geological studies spanning geologic site characterization, geophysical surveying, geologic and groundwater modeling, natural hazards assessments, and groundwater resource feasibility and sustainability studies across the United States. Additionally, Dr. Gooch has worked on geoscience projects related to petroleum exploration and carbon sequestration in the governmental and industrial sectors. Dr. Gooch has experience teaching various classroom- and field-based geoscience courses, including graduate-level hydrogeology. Since joining LWA, Dr. Gooch has conducted numerous hydrogeologic investigations in aquifer characterization, time series analyses of groundwater levels, geophysical surveying, groundwater sustainability management, managed aquifer recharge, water supply and water resources, and conceptual and numeric geologic model building.

 

Maribeth L. Kniffin, Ph.D

Dr. Maribeth Kniffin is a postdoctoral scholar in hydrology at the University of California, Davis working with Dr. Helen Dahlke and Dr. Laura Foglia to model the impacts of Flood-Managed Aquifer Recharge in the Cosumnes River basin. Dr. Kniffin completed a postdoc at the University California, Merced researching climate change impacts on mountain headwater storage using downscaled global climate model projections. During her PhD at the University of Wisconsin-Madison, Dr. Kniffin studied groundwater/surface water interactions in an irrigated agricultural area using groundwater flow modeling and stable isotope analyses. In addition, she conducted participatory stakeholder engagement processes to link science, modeling, and water resources decision-making.

 

Moderator BIO:

Michael Bombard, PG, CHG

Michael Bombard, PG, CHG is a hydrogeologist with over 33 years experience conducting and managing projects that primarily revolve around groundwater. He successfully managed hundreds of projects ranging from small "one-offs" to multi-year multi-million dollar projects performed over several years. Recently, Mike successfully managed a first of its kind $1.2M Groundwater Well Asset Management Plan for a major northern California water utility. Mike provided technical direction on water-supply projects involving springs used for bottled water sources and production wells in the US and Mexico. He designed, installed, and/or properly abandoned monitoring, extraction, injection, and water supply wells for numerous sites in Northern California. He also designed and provided design and oversight of production well rehabilitation efforts in the US and Mexico. Mike installed and managed well and boring installation programs that used various drilling techniques including mud rotary, air rotary (casing hammer, Odex and Tubex) dual-tube percussion, hollow-stem auger and rock coring. He conducted well hydraulic testing including specific capacity, short- and long-term pumping tests, and slug tests and evaluated the test data. He has also evaluated hydrogeochemical data, monitored natural data and other data involving groundwater contamination.

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Date and Time

Wed, July 14, 2021

noon - 1 p.m.
(GMT-0700) America/Los_Angeles

Location

Login Instructions will be in included in the confirmation email



This GRACast will use zoom webinar.

Event has ended

Group(s): GRA