Cohesive suspended sediment transport: feasibility and limitations of numerical modeling

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Abstract
The state of the art in numerical simulation of cohesive sediment transport has advanced considerably in the past ten years. Nevertheless, for engineering applications, reliable predictive results are not yet within our reach and model use is often restricted to sensitivity analysis purposes, already very useful. Reasons of relative failure in gaining quantitative results do not come from the numerical techniques, which are well experienced today, but from the incomplete knowledge of basic processes such as deposition, erosion and consolidation of cohesive sediment. The still unsatisfactory predictions of numerical models may also originate from a possible discrepancy between specifications of physical laws, derived from laboratory experiments, and prototype behaviour. This paper relies almost exclusively upon modelling approaches in use at Laboratoire National d'Hydraulique, Chatou, France.

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