Physical processes constituting fine, cohesive sediment transport in estuarial waters are described. These processes, which include settling and depo-sition, consolidation, erosion and transport in suspension, are typically interlinked by the cyclic nature of the tide dominated environment. Complexities in process characterization arise as a consequence of the dual dependence of sediment ag-gregate properties on the physico-chemical properties of the sediment-water mix-ture as well as the turbulent flow field. Present day knowledge of the processes enables reliable predictions of rates of sedimentation and erosion in navigable chan-nels, waterways and harbors through numerical modeling. Further research is re-quired for improving procedures for measuring settling velocities, identification of depth at which a definable bed is encountered, and the behavior of near-bed high density suspensions.
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