San Francisco Bay

Science Center Objects

USGS scientists have made great strides in refining and extending the capabilities of the Computational Assessments of Scenarios of Change for the Delta Ecosystem (CASCaDE II model systems); a collaboration among the USGS and several academic and international organizations. This paved the way for more reliable and objective evaluations of the ecosystem consequences of management actions and climate change than have been possible. CASCaDE II is an integrated system that models linkages between climate, hydrology, hydrodynamics, sediment, water quality, and several biological and ecological processes occurring in the Estuary. This will improve the ability for scientists and planners to anticipate and diagnose Bay-Delta ecosystem responses to both planned and unplanned changes including modifications of water infrastructure, tidal marsh restoration, and climate change. USGS is collaborating with management agencies and stakeholders to apply the CASCaDE tools to answer questions critical to California’s water future and preservation of the Bay-Delta, such as how climate change and the new conveyance infrastructure and increased tidal marsh will alter drinking water quality.


San Francisco Bay and Sacramento-San Joaquin Delta Estuary

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 USGS provides science essential to address issues of importance to our partners and the public. 

Habitat Restoration: South Bay Salt Pond Project

The South Bay Salt Pond Restoration Project can be used as a model of how interdisciplinary science, policy, and management efforts can address complex issues associated with large-scale estuarine restoration and help to provide a mosaic of diverse habitats for wildlife, quality public access, and environmental education.

Water quality sampling using a Niskin sampler from the Research Vessel Polaris at sunset on San Francisco Bay.

USGS conducts water quality sampling to describe changes in water quality along the deep channel of the San Francisco Bay-Delta system. Here a water discrete water sample is collected using a Niskin sampler at sunset in north San Francisco Bay.(Credit: Francis Parchaso, USGS. Public domain.)



Western Ecological Research Center (WERC)

WERC Ridgway's rail in marsh with reflection

WERC Ridgway's rail in marsh with reflection (Public domain.)


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