Mechanisms of sediment flux between shallows and marshes

San Francisco Bay National Estuarine Research Reserve
By: , and 

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Abstract

We conducted a field study to investigate temporal variation and forcing mechanisms of sediment flux between a salt marsh and adjacent shallows in northern San Francisco Bay. Suspended-sediment concentration (SSC), tidal currents, and wave properties were measured over the marsh, in marsh creeks, and in bay shallows. Cumulative sediment flux in the marsh creeks was bayward during the study, and was dominated by large bayward flux during the largest tides of the year. This result was unexpected because extreme high tides with long inundation periods are commonly assumed to supply sediment to marshes, and long-term accretion estimates show that the marsh in the study site is depositional. A water mass-balance shows that some landward transport bypassed the creeks, most likely across the marsh-bay interface. An estimate of transport by this pathway based on observed SSC and inferred volume indicates that it was likely much less than the observed export.

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Additional publication details

Publication type Conference Paper
Publication Subtype Conference Paper
Title Mechanisms of sediment flux between shallows and marshes
DOI 10.1142/9789814689977_0082
Year Published 2015
Language English
Publisher World Scientific
Contributing office(s) Pacific Coastal and Marine Science Center
Larger Work Type Book
Larger Work Subtype Conference publication
Larger Work Title The Proceedings of Coastal Sediments 2015
Conference Title Coastal Sediments 2015
Conference Location San Diego, CA
Conference Date May 11-15, 2015
Country United States
State California
Other Geospatial San Francisco Bay