STUDY ON SEDIMENT DISCHARGE DISTRIBUTIONS IN A COMPOUND CHANNEL WITH DIFFERENT PLAN FORMS

Abstract

It is important to evaluate properly sediment discharge distribution of the meandering compound channel, because the plan shape of many rivers in Japan has a meandering compound change. We use conventional bed-load equation derived for a simple channel. An applicability of conventional bed-load equation should be examined for compound channels.
In this paper, at first we investigate sediment discharge characteristics in the compound channel whose plan form changes longitudinally. In the second, we compare analytical sediment discharge rate obtained from our 3D-flow model and experimental result. Problems are raised to sediment discharge rate and distribution of compound channels with different plan forms.