Hydraulic Experiments on Characteristic of Channel Network Congurations

Abstract

Channel network configurations are changed by hydraulic conditions. The characteristic of a river channel network configuration is directly connected with river channel disasters and a river ecosystem. For this reason, the relation between the form characteristic and the hydraulic conditions needs to be grasped. In this study, hydraulic experiments on channel network configurations were conducted. Sufficiently wide flume was used for the experiments so that the influence of side walls might not appear in the channel network formation. Although few channels were formed in the hydraulic condition that the bed shear stress was near the critical bed shear stress, multi-row bars were formed in the condition that the bed shear stress is to some extent large. As a result of conducting linear stability analysis, it was shown that a phenomenon which is different when hydraulic conditions differ arises.