Mechanisms of sediment flux between shallows and marshes
San Francisco Bay National Estuarine Research Reserve
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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.
Suggested Citation
Lacy, J.R., Schile, L., Callaway, J., Ferner, M., 2015, Mechanisms of sediment flux between shallows and marshes, in The Proceedings of Coastal Sediments 2015, San Diego, CA, May 11-15, 2015, https://doi.org/10.1142/9789814689977_0082.
Study Area
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Mechanisms of sediment flux between shallows and marshes |
| DOI | 10.1142/9789814689977_0082 |
| Publication Date | April 15, 2015 |
| 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 |