Sacramento Valley – Solano
Statistics
- Basin Name
- Sacramento Valley – Solano
- Basin Number
- 5-021.66
- SGMA Basin Priority
- Medium
- Critically Overdrafted
- No
- Hydrologic Region Name
- Sacramento River
- Counties
- Sacramento, Solano, Yolo
Basin Notes
2003: Bulletin 118 basin description
2014: CASGEM basin prioritization – medium
2016: Basin boundary modification with Yolo 5-021.67, Colusa 5-021.52 and Capay 5-021.68 Sacramento Valley subbasins approved.
2018: Basin draft priority – high. Groundwater levels and salt intrusion comments:
- 1) CASGEM/WDL/GWIDS: Longterm hydrographs show groundwater level decline. Source: DWR 2) The Solano Project was developed to help mitigate the declining groundwater elevations in Solano County. Source: Solano County Water Agency / Local Conditions
- 1) Numerous upstream storage facilities, together with diversions of water from the Delta and the tributary streams of the Delta have substantially reduced the amount of fresh water flowing into the Delta with a resultant increase in salinity intrusion into the Marsh and Delta. …The following policies represent the County’s intent in preserving water quality and reducing flood hazards in the Suisun Marsh: SM.P-11: Projects designed to import or redistribute the fresh water in the Marsh for salinity control should be planned carefully so that the expected benefits are realized. SM.P-12: To prevent crop damage in some areas, the withdrawal of groundwater from the aquifers surrounding the Marsh may be desirable. Withdrawal should not be so extensive as to allow the salt water of the Marsh to intrude into fresh water aquifers, or to disrupt the natural subsurface flow of groundwater into the Marsh. Source: Suisun Marsh Draft General Plan
2019: Basin boundary modification revised the internal boundary line between Yolo and Solano subbasins to bring Yolo County Reclamation Districts 150, 307, and 999 into the Yolo Subbasin.
Phase 2 draft basin priority: high
2022: January 27 – GSP submitted to DWR
2024: January 18 – DWP approved GSP
At-A-Glance
California Water Library Documents About This Basin
Groundwater sustainability and land subsidence in California’s Central Valley
Water (MDPI) | April 22nd, 2024
The Central Valley of California is one of the most prolific agricultural regions in the world. Agriculture is reliant on the conjunctive use of surface-water and groundw
Statement of Findings regarding the Approval of the Sacramento Valley - Solano Subbasin Groundwater Sustainability Plan
California Department of Water Resources (DWR) | January 18th, 2024
The Department of Water Resources (Department) has evaluated the groundwater sustainability plan (GSP or Plan) submitted for the Sacramento Valley – Solano Subbasin and
Thousands of domestic and public supply wells face failure despite groundwater sustainability reform in California’s Central Valley
Nature Portfolio (Springer Nature) | September 8th, 2023
Subsurface water flux in California's Central Valley and its source watershed from space geodesy
American Geophysical Union (AGU) | September 29th, 2022
We combine measurements from Global Positioning System positioning and Gravity Recovery and Climate Experiment gravity to infer change in water components in Central Vall
Critical Aquifer Overdraft Accelerates Degradation of Groundwater Quality in California's Central Valley During Drought
American Geophysical Union (AGU) | September 1st, 2021
It has been established that wells are at risk to run dry when groundwater levels decline during drought, but associated impacts to water quality are poorly understood.
Domestic well vulnerability to drought duration and unsustainable groundwater management in California's Central Valley
Environmental Research Letters (IOP) | March 18th, 2020
Millions of Californians access drinking water via domestic wells, which are vulnerable to drought and unsustainable groundwater management. Groundwater overdraft and th
A hybrid machine learning model to predict and visualize nitrate concentration throughout the Central Valley aquifer, California, USA
Science of the Total Environment (Elsevier) | June 9th, 2017
Intense demand for water in the Central Valley of California and related increases in groundwater nitrate concentration threaten the sustainability of the groundwater res
Geochemistry of Ground Water in the Sacramento Valley, California
U.S. Geological Survey (USGS) | July 13th, 1984
A geochemical investigation was done to evaluate temporal changes in water quality and to determine the processes that control water chemistry in shallow ground water of
Geology, water resources and usable ground-water storage capacity of part of Solano County, California
U.S. Geological Survey (USGS) | July 1st, 1960
The area described is confined largely to the valley-floor and foothill lands of Solano County, which lies directly between Sacramento, the State capital, and San Franc