Abstract
In steep alluvial rivers, braided channels are often produced due to the formation of multiple raw bars. It is important to predict the long term bed variation as well as channel shifting for river for river regulation works.
In this paper, the Abe river is chosen for discussions. The field data show the river bed has aggraded since the year 1967, and a typical draided channel is formed. The applicability of a two-dimensional numerical model is verified for local erosion and deposition in braided areas and outer-bank erosion in curved regions. In addition, it is found that the method can predict a complex bed configuration, which is caused by an artificial change of the upstream reach.
