A method for the prediction of a movable bed roughness coefficient is proposed by relating the roughness parameter A to the nondimensional shear stress τb′/τc50 and the Froude number of flow. This relationship is tested with a large number of flume and field data from different sources, and also compared with other prediction methods. The calculated flow depth based on the bed roughness coefficient predicted by the proposed method agrees very well with the measured data.
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Wu et al. (1999) studied this question.
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