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Sacramento River, California – the largest tributary to
the San Francisco Bay watershed
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Aerial photo of the San Francisco Bay and the Sacramento River/San Joaquin River delta
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An oblique aerial photo showing sediment disturbance and transport at Dunbarton Bridge on the Bay
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USGS Research Vessel Polaris, a floating laboratory dedicated
to monitoring and research in San Francisco Bay and its
tributary rivers
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USGS Research Vessel Polaris in port at
Redwood City, CA. The 96 foot Polaris was completed in 1927 and has been owned by the USGS since
1966. She is reputedly the oldest active vessel in the Federal service
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Inside the pilothouse of the USGS Polaris Research Vessel
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USGS scientist collecting water samples for analysis for pesticide content in the San Joaquin River
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USGS scientist retrieving a water-quality sample from a deep-water sampling chamber on board the USGS Research Vessel Polaris
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Zooplankton sampling to measure the biological production of the
Sacramento-San Joaquin River Delta's channels
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Collecting large-volume water samples from the San Joaquin River, CA, for pesticide analysis
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Preparation for water-quality sampling in the Sacramento-San
Joaquin River Delta, a USGS contribution to the CALFED
Bay-Delta Ecosystem Restoration Program
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USGS conducts a workshop for high-school and university
teachers, exploring exercises for teaching marine science from
the USGS Website for water-quality in San Francisco Bay
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U.S. Department of the Interior |
U.S. Geological Survey
