Modelling sediment transport with hysteresis effects

Knaapen, M. and Kelly, D.M. (2011) Modelling sediment transport with hysteresis effects. In: TELEMAC-MASCARET User Conference 2011, 19-21 October 2011, Paris, France.

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Abstract

This paper details the extension of the sediment transport and morphology model SISYPHE 2D to include a lag term within the bed exchange source term of the, depthaveraged, continuity of sediment concentration equation. This lag term represents the time it takes for a sediment concentration profile to adapt to spatial or temporal changes in the flow. The inclusion of a lag term means that the settling velocity is no longer the only scaling factor for the exchange of sediment between the water and the bed. The newly modified SISYPHE 2D is tested against field data from the Thames estuary (UK), flume experiments on a dredged trench and a hypothetical channel widening. It is illustrated that the lag factor introduced into SISYPHE 2D is essential to model the sediment transport and morphodynamics, especially when considering engineered situations, where the bed is out of equilibrium with the flow conditions. Moreover, with this lag factor included, there is evidence that SISYPHE 2D can be used for (short term)morphodynamic modeling of engineered situations.

Item Type: Conference or Workshop Item (Paper)
Additional Information: XVIIIth TELEMAC-MASCARET User Conference
Subjects: Maritime > General
Coasts > Sediment transport and scour
Coasts > General
Divisions: Coastal
Maritime
Depositing User: Unnamed user with email i.services@hrwallingford.com
Date Deposited: 02 Apr 2020 09:49
Last Modified: 28 May 2020 10:09
URI: http://eprints.hrwallingford.com/id/eprint/812

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