Modelling sand resuspension by waves over a rippled bed
Trouw, K.; Williams, J.J.; Rose, C.P. (2000). Modelling sand resuspension by waves over a rippled bed. Est., Coast. and Shelf Sci. 50(1): 143-151. dx.doi.org/10.1006/ecss.1999.0542 In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714; e-ISSN 1096-0015, more |  |
| Keywords | Models > Scale models > Hydraulic models
Ocean floor
Particulates > Suspended particulate matter
Profiles > Vertical profiles
Sedimentary structures > Bed forms
Sedimentary structures > Bed forms > Sand ripples
Sediments > Clastics > Sand
Suspension > Resuspension
Marine/Coastal | | Author keywords | sediment transport; ripples; waves; wave flume; sand concentrations; sediment cloud |
| Authors | | Top | - Trouw, K., more
- Williams, J.J.
- Rose, C.P.
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| Abstract | With a two-dimensional Kappa-Epsilon-model and equations to describe sediment entrainment, diffusion, convection and settling, wave-induced flow velocities and sediment concentration fields over rippled beds have been calculated. Results from the simulations are compared with time-averaged vertical suspended sediment concentration profiles, C-profiles, measured in a large wave flume using the autonomous multi-sensor instrument STABLE. The simulations make it possible to examine in detail the mechanisms of sediment entrainment, vortex formation and advection. The resulting animations of model output allow a quasi-3-D visualization of sediment resuspension processes and aid quantification of the resulting vertical suspended sediment concentration field due to regular waves, asymmetric waves and wave groups. The work contributes therefore, to knowledge about wave-sediment interactions and to understanding of sediment transport mechanics. |
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