Siltation by sediment-induced density currents
Winterwerp, J.C.; van Kessel, T. (2003). Siltation by sediment-induced density currents. Ocean Dynamics 53(3): 186-196
In: Ocean Dynamics. Springer-Verlag: Berlin; Heidelberg; New York. ISSN 1616-7341; e-ISSN 1616-7228, meer
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Density currents
Numerical models
Sediments > Clastics > Mud > Fluid mud
Siltation
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| Auteurs | | Top |
- Winterwerp, J.C., meer
- van Kessel, T., meer
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| Abstract |
This paper describes the results of numerical experiments with a three-dimensional hydrodynamic and mud transport model in which sediment-fluid interaction is taken into account through the effects of hindered settling, buoyancy destruction in the turbulence k- ε model and sediment-induced barocline pressure gradients in the momentum equations. The model was applied to a schematic case representing a coastal area with a tidal river, navigation channel and harbour basin, and a real-world case, viz. Rotterdam harbour area in The Netherlands. The results show that the sediment transport into the harbour area, and subsequent siltation rates, increase by a factor 3 to 5 due to the sediment-fluid interaction. It is shown that the larger contribution stems from an increase in vertical gradients in suspended sediment. |
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