The Beginning of Sediment Transport as a Probability-Problemby Ulrich Zanke, Inst for Hydraulics, Germany,
Abstract: Sediment transport only takes place when the action of flow (shear stress, velocity) exceeds a critical value. The limit between rest and movement can be given as critical flow velocity, critical shear velocity, critical shear stress, critical dimensionless shear stress. Each of these values, describing the critical conditions, can be calculated from the other values. The aim of this work is to find a better solution for the critical conditions and for transport at low rates of shear-stress.
Subject Headings: Shear stress | Shear flow | Sediment transport | Fluid velocity | Critical flow | Probability | Water flow | Transport rates
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