Sediment erodability in sediment transport modelling: Can we account for biota effects? |
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| Authors: | P Le Hir Y Monbet F Orvain |
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| Institution: | IFREMER, Centre de Brest, BP 70, 29280 Plouzané, France |
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| Abstract: | Sediment erosion results from hydrodynamic forcing, represented by the bottom shear stress (BSS), and from the erodability of the sediment, defined by the critical erosion shear stress and the erosion rate. Abundant literature has dealt with the effects of biological components on sediment erodability and concluded that sediment processes are highly sensitive to the biota. However, very few sediment transport models account for these effects. We provide some background on the computation of BSS, and on the classical erosion laws for fine sand and mud, followed by a brief review of biota effects with the aim of quantifying the latter into generic formulations, where applicable. |
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| Keywords: | Sediment dynamics Macrophytes Microphytobenthos Biostabilisation Macrofauna Bioturbation Mudflat morphology Modelling |
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