On Propagation Characteristics of River Bed Variation due to Large Scale Sediment Yield

Abstract

This study deals with the effects of the sediment yield on topography of stream or river channels. In this paper, the result of study on propagation characteristics of river bed variation due to large scale sediment yield by using a synthetic sediment routine model in a mountainous river system is presented. After validating the model using the field measurement data, the result of some sets of computer simulations of river bed variation in the conditions of idealized severe sediment yields were carried out. The effects of various conditions of the simulations such as treatment of debris flow and location of observation point, and tendencies of river bed variation are discussed.