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  California Water Science Center

Tomales Bay Watershed Intensive Sediment Transport Monitoring Study

Project Chief: David Schoellhamer

This project is part of the NPS-USGS Water Quality Assessment and Monitoring partnership program, and was developed through coordination with the Point Reyes National Seashore. The project addresses the Clean Water Act Section 303(d) listing of Tomales Bay and its two major freshwater drainages, Lagunitas Creek and Walker Creek as impaired by sediment. The project will implement daily, seasonal, suspended-sediment monitoring at two existing USGS stream gages and periodic, seasonal, suspended-sediment sampling at one existing stream gage. The sediment sampling is supplemented with more frequent (for example, 15-minute) optical backscatter/turbidity monitoring at all three gages, to capture the rapid temporal variations in sediment concentration and test the use of optical backscatter as a sediment surrogate in this environment. The project implementation plan has been developed in conjunction with the San Francisco Bay Regional Water Quality Control Board and is consistent with the Tomales Bay Watershed Council Action Plan. Information derived from this project contributes to the development and implementation of sediment TMDLs for Tomales Bay and its watersheds.

Contact Information

David Schoellhamer
Office phone: 916-278-3000

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Page Last Modified: Thursday, 29-Dec-2016 23:06:31 EST