Author(s)

J.-M. Hervouet, C. Machet & C. Villaret

Abstract

Dealing with rigid beds in saturated bed load transport equations J.-M. Hervouet, C. Machet & C. Villaret Laboratoire National d'Hydraulique et Environnement. Electricitd De France, Research & Development Division. France Abstract In this paper a new method for dealing with rigid beds in saturated bed load transport equation is proposed. The divergence of the bed load transport is responsible for the variations of bed elevation, and the method consists of finding a limitation of this bed load transport which ensures a limitation of its divergence so that the rigid bed is not affected. The technique is detailed in the framework of the finite element theory. 1 Introduction Classical sediment transport formulae deal with saturated transport, which means that they give the maximum capacity of transport of a turbulent flow acting over sediment. For instance, the Meyer-Peter and Miiller formula gives the following solid transport rate, in m2/s : p, is the sediment density, p is the water density, g

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