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Journal Articles Journal of Hydraulic Engineering Year : 2007

Critical Shear Stress of Bimodal Sediment in Sand-Gravel Rivers

Abstract

A new model for the critical shear stress and the transport of graded sediment is presented. The model is based on the size distribution of the bed surface and can be used to compute sediment transport rates in numerical simulations with an active layer model. This model makes a distinction between unimodal and bimodal sediments. It is assumed that all size fractions of unimodal sediments have the same critical shear stress while there is selective transport for the gravel fractions of bimodal sediments. A recently published laboratory transport data set is used to calibrate our model.

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Hydrology
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Dates and versions

insu-00386813 , version 1 (22-05-2009)

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Matthieu de Linares, Philippe Belleudy. Critical Shear Stress of Bimodal Sediment in Sand-Gravel Rivers. Journal of Hydraulic Engineering, 2007, 133 (5), pp.555 à 559. ⟨10.1061/(ASCE)0733-9429(2007)133:5(555)⟩. ⟨insu-00386813⟩
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