Abstract
In order to assess the sediment transport in a whole water system, a synthetic sediment routing model based on the river channel networks obtained from the digital elevation map was examined. The sediment routing model was applied to the Haya River basin and the Abe River basin. Through the application using two kinds of scale of channel network element, and the diffelent catchment area, effects of these elements on the simulation of river bed variation were discussed. The results show that the river bed variation in the two kinds of scale, 250m mesh and 500m mesh, shows about the same behavior except upper part of the basin, and themodel has a possibility to be applicable.
