SEDIMENTATION IN CHANNELS AND TRENCHES

Abstract

In this paper the siltation in approach channels and trenches due to cross currents and waves is discussed. It is in this respect not necessary that the current crosses the channel at a right angle. When the current crosses the channel obliquely simply a greater distance over which the water flows over the greater depth is introduced. Deviations in the flow pattern - see figure 1 - due to the channel are neglected. When the flow pattern is known, either from measurements in nature or in model this effect can easily be introduced. The influence of the waves is introduced through the introduction of an increased bed shear and subsequently higher diffusion coefficient (see Bijker, 1971, [3]).