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Modelling tidal currents in a sediment stratified idealized estuary
- Source :
- Continental Shelf Research. 25:655-665
- Publication Year :
- 2005
- Publisher :
- Elsevier BV, 2005.
-
Abstract
- A numerical modelling study on the effects of sediment-induced stratification on tidal currents is conducted for an idealized tidal estuary with a muddy seabed. The numerical model is a three-dimensional oceanic sediment transport model capable of predicting dynamics of Newtonian fluid mud layers due to coupling of the sea water density and suspended sediment concentration. The model uses a reparameterized bottom drag coefficient C d that incorporates a linear stability function of flux Richardson number R f . The study has shown that the sediment-induced stratification in the bottom boundary layer (BBL) reduces the vertical eddy viscosity and bottom shear stress in comparison with the model prediction in a neutrally stratified BBL. In response to these apparent reductions, the tidal current shear in the water column is increased in the estuary.
Details
- ISSN :
- 02784343
- Volume :
- 25
- Database :
- OpenAIRE
- Journal :
- Continental Shelf Research
- Accession number :
- edsair.doi...........561339e9c55f0c79fd3546c7114f446e