Tidal and meteorological forcing of sediment transport in tributary mudflat channels


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dc.contributor.author Ralston, David K.
dc.contributor.author Stacey, Mark T.
dc.date.accessioned 2007-09-19T20:13:10Z
dc.date.available 2007-09-19T20:13:10Z
dc.date.issued 2006-01-31
dc.identifier.uri http://hdl.handle.net/1912/1798
dc.description Author Posting. © Elsevier B.V., 2007. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Continental Shelf Research 27 (2007): 1510-1527, doi:10.1016/j.csr.2007.01.010. en
dc.description.abstract Field observations of flow and sediment transport in a tributary channel through intertidal mudflats indicate that suspended sediment was closely linked to advection and dispersion of a tidal salinity front. During calm weather when tidal forcing was dominant, high concentrations of suspended sediment advected up the mudflat channel in the narrow region between salty water from San Francisco Bay and much fresher runoff from the small local watershed. Salinity and suspended sediment dispersed at similar rates through each tidal inundation, such that during receding ebbs the sediment pulse had spread spatially and maximum concentrations had decreased. Net sediment transport was moderately onshore during the calm weather, as asymmetries in stratification due to tidal straining of the salinity front enhanced deposition, particularly during weaker neap tidal forcing. Sediment transport by tidal forcing was periodically altered by winter storms. During storms, strong winds from the south generated wind waves and temporarily increased suspended sediment concentrations. Increased discharge down the tributary channels due to precipitation had more lasting impact on sediment transport, supplying both buoyancy and fine sediment to the system. Net sediment transport depended on the balance between calm weather tidal forcing and perturbations by episodic storms. Net transport in the tributary channel was generally off-shore during storms and during calm weather spring tides, and on-shore during calm weather neap tides. en
dc.description.sponsorship The research was funded by National Institutes of Health grant P42ES0475 from the National Institute of Environmental Health Sciences. References en
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.relation.uri http://dx.doi.org/10.1016/j.csr.2007.01.010
dc.subject Sediment transport en
dc.subject Intertidal sedimentation en
dc.subject Salinity gradients en
dc.subject Tidal inlets en
dc.subject Topographic effects en
dc.subject San Francisco Bay, California, USA en
dc.title Tidal and meteorological forcing of sediment transport in tributary mudflat channels en
dc.type Preprint en

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