Developing Science Based Scalable Approaches to Groundwater Banking
Groundwater is cri cal to life in California (and much of the world) and current use is unsustainable By law and by necessity groundwater management must change Science based management prac ces are lacking
Berkeley Lab exper se can help fill the need
Gregory A. Newman Lawrence Berkeley Na onal Laboratory
Groundwater is Cri cal to Life in California and Current Use is UnsustainableGroundwater is Cri cal to Life in California and Current Use is Unsustainable
Overdra ~1-2 million AF/yr
Normal Year ~29% Dry Year ~39% Drought Year ~60%
Groundwater Level Change Spring 2012 to Spring 2015 Groundwater Recharge or Banking: building a rainy sunny day fund
Precipita on Comes in Pulses
How to connect short term extreme events to long term groundwater storage?
Groundwater Managed Long-term
Subsurface Process Knowledge and Modeling: Geophysical imaging Hydro-Chem-Mechanical Modeling Groundwater Recharge or Banking: building a rainy sunny day fundcharge or Banking: building a rainy sunny day fund Pumped Recharge Dedicated Basin ($124/AF)
Use Exis ng Infrastructure and Agriculture Lands to Restore Groundwater ($40-107 AF)? Where is there suitable subsurface for banking?
Where will banked groundwater go?
How long will it take to get there?
What will be the water quality?
How will it impact energy use and subsidence?
How much current and future overdra can be met by different GW banking strategies? (coupled hydroclimate)
What will be the impact on the surface water system, Delta? Detailed Knowledge of Surface Soil Proper es and Suitability
10 km Course Knowledge of Subsurface Suitability Course Knowledge of Subsurface Suitability Where is there suitable subsurface for banking?
Scalable Approach to Water Banking Valida on and Verifica on Scalable Approach to Water Banking Valida on and Verifica on CVHM Geophysical Imaging CASGEM Data Worth Surface wave Well logs Ini al Analysis tomography (SWT) and hydrologic Site electrical resis vity model tomography (ERT)
Water Applica on
Addi onal site selec on using Water Fate based on new insights, CVHM regions, Characteriza on and results from ETA-CEC GW refined hydrologic Pumping Project model
Upscaling Cross Valida on Wider region
Build Reac ve network InSAR surface deforma on for into hydrological model by mechanical impacts and assigning reac vity to regional context Upscaling geophysical data structure to local region Where is there suitable subsurface for banking?
ScalablScalable Approach to Water Banking Valida on and Verifica on CVHM Geophysical Imaging CASGEM Data Worth Surface wave Well logs Ini al Analysis hydrologic tomography (SWT) and Site model in electrical resis vity Tough2 tomography (ERT)
Water Applica on
Addi onal site selec on using Discon nuous Clay Rich Zones Water Fate based on new insights, CVHM regions, Characteriza on and results from ETA-CEC GW refined hydrologic Pumping Project model
Upscaling Cross Valida on Wider region
Build Reac ve network InSAR surface deforma on for into hydrological model by mechanical impacts and assigning reac vity to regional context Upscaling geophysical data structure to local region Where is there suitable subsurface for banking?
Scalable Approach to Water Banking Valida on and Verifica on
CVHM Geophysical Imaging CASGEM Data Worth Surface wave Well logs Ini al Analysis tomography (SWT) and hydrologic Site electrical resis vity model tomography (ERT)
Water Applica on
Addi onal site selec on using Water Fate based on new insights, CVHM regions, Characteriza on and results from ETA-CEC GW refined hydrologic Pumping Project model
Upscaling Cross Valida on Wider region
Build Reac ve network InSAR surface deforma on for into hydrological model by mechanical impacts and assigning reac vity to regional context Upscaling geophysical data structure to local region Electrical Resis vity Tomography for Almond Groundwater Banking
ERT data acquisi o n system Steel electrodes
Resis vity (ohm.m)
10 100 1000 Geophysical Monitoring of Subsurface Processes
Differencing of geophysical data collected over me highlights changes due to Natural or engineered hydrological or biogeochemical transforma ons. Material with different proper es (e.g. water, solute, mineral precipitate) Geophysical Imaging can provide understanding of the control of heterogeneity on induced Transforma ons over field-relevant scales ERT for Water Infiltra on Studies Demonstrated sensi vity of resis vity to changes in soil water Rain water infiltra on Irriga on water infiltra on content Δρ over me Δρ over me Time
Surface based Cross well The image part with relationship ID rId8 was not Large spa al Be er ver cal Suzuki and Higashi 2001 found in the file. Barker and Moore 1998 coverage resolu on Surface Wave Tomography for Almond Groundwater Banking Surface Wave Tomography for Almond Groundwater Banking Surface Wave Tomography 4.5 Hz ver cal geophones R E C S E O I U V R E C R E S S MiniVib 4-80 Hz 10 Surface Wave Tomography Example -- Abandoned Mine Sites Groundwater Banking Test Sites
New Collabora on with UC Davis & Almond Board of California
Delhi Site: Modesto Site: Very Sandy down to 10 Clay rich, confining layer at 7 dry Wet Fast infiltra on Slow infiltra on Vadose Zone Hydrological Transport
• Poorly understood
• Transport is controlled by heterogeneous deposits that are geologically that can be chao c in nature
• Understanding is necessary for proper groundwater stabiliza on strategies of subsurface aquifers Vadose Zone Characteriza on
• Mapping of Geological Heterogenei es
• Iden fica on of Transport/Permeable Pathways
• Iden fica on of Potable Waters Relevant Geophysical Methods
• Cross Well EM • Surface Methods – Transient EM – Surface Nuclear Magne c Resonance • Airborne EM • Surface Seismics