San Francisco Bay and Sacramento-San Joaquin Delta Estuary
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The San Francisco Bay/Sacramento-San Joaquin Delta is one of the largest estuaries in the United States. It provides water to more than 25 million California residents, farmlands, and key fish and wildlife habitats. To help ensure the health of this crucial estuary, the U.S. Geological Survey provides science essential to address issues of importance to our partners and the public.
San Francisco Bay and Delta Overview Video
Learn about the San Francisco Bay-Delta ecosystem, current management issues, and some of the monitoring and research the USGS is conducting in coordination with others.
Watch VideoUSGS Science at Work
This fact sheet provides an overview of USGS research in the San Francisco Bay-Delta region.
Read MoreState of the Network
Long-Term, High-Frequency Flow and Water Quality Data in the San Francisco Estuary, California
New article provides examples of the work being done to measure water flow and quality in the San Francisco Estuary.
Read the ArticlePublications
Using the STARS Model to evaluate the effects of two proposed projects for the long-term operation of State Water Project Incidental Take Permit Application and CEQA compliance
The California Department of Water Resources (DWR) requested analysis of juvenile Chinook salmon survival in the Sacramento-San Joaquin River Delta (henceforth identified as “the Delta”) as part of an effects analysis that will be included in an Incidental Take Permit (ITP) Application. This application is in compliance with the California...
Perry, Russell W.; Hansen, Amy C.; Evans, Scott D.; Kock, Tobias J.
Using the STARS model to evaluate the effects of the proposed action for the reinitiation of consultation on the coordinated long-term operation of the Central Valley and State Water Project
In 2016, the U.S. Bureau of Reclamation (USBR) and California Department of Water Resources requested a reinitiation of consultation under Section 7 of the Endangered Species Act on the coordinated long-term operations of the Central Valley and State Water Projects. This resulted in a Biological Assessment released by USBR in 2019. In its analysis...
Perry, Russell W.; Pope, Adam C.; Sridharan, Vamsi K.
Flow-mediated effects on travel time, routing, and survival of juvenile Chinook salmon in a spatially complex, tidally forced river delta
We evaluated the interacting influences of river flows and tides on travel time, routing, and survival of juvenile late-fall Chinook salmon (Oncorhynchus tshawytscha) migrating through the Sacramento–San Joaquin River Delta. To quantify these effects, we jointly modeled the travel time, survival, and migration routing in relation to individual...
Perry, Russell W.; Pope, Adam C.; Romine, Jason G.; Brandes, Patricia L.; Burau, Jon R.; Blake, Aaron R.; Ammann, Arnold J.; Michel, Cyril J.