The use of modeling and suspended sediment concentration measurements for quantifying net suspended sediment transport through a large tidally dominated inlet

Sediment exchange at large energetic inlets is often difficult to quantify due complex flows, massive amounts of water and sediment exchange, and environmental conditions limiting long-term data collection. In an effort to better quantify such exchange this study investigated the use of suspended se...

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Bibliographic Details
Published in:Marine geology 2013-11, Vol.345, p.96-112
Main Authors: Erikson, Li H., Wright, Scott A., Elias, Edwin, Hanes, Daniel M., Schoellhamer, David H., Largier, John
Format: Article
Language:English
Subjects:
Delft3D
estuaries
Exchange
Flux
Gates
inlet sediment flux
Inlets
International trade
Mathematical models
San Francisco Bay
Sediments
suspended sediment transport
Tides
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Summary:Sediment exchange at large energetic inlets is often difficult to quantify due complex flows, massive amounts of water and sediment exchange, and environmental conditions limiting long-term data collection. In an effort to better quantify such exchange this study investigated the use of suspended sediment concentrations (SSC) measured at an offsite location as a surrogate for sediment exchange at the tidally dominated Golden Gate inlet in San Francisco, CA. A numerical model was calibrated and validated against water and suspended sediment flux measured during a spring–neap tide cycle across the Golden Gate. The model was then run for five months and net exchange was calculated on a tidal time-scale and compared to SSC measurements at the Alcatraz monitoring site located in Central San Francisco Bay ~5km from the Golden Gate. Numerically modeled tide averaged flux across the Golden Gate compared well (r2=0.86, p-value
ISSN:0025-3227
1872-6151
DOI:10.1016/j.margeo.2013.06.001