Abstract
Authors proposed the network-moder for arguing a stable longitudinal profile on the basin. This model enables us to evaluate the longitudinal variations of dischare and sediment discharge, bed elevation, mean diameter of bed materials, width of channels and flow depth. In this model, there are some assumptions that discharge from the outer link in all the basin, sediment discharge from the outer link, inflow and sediment inflow from the side basin in the basin of branches are the same. In the real basin, those factors are complicated by geographical and geological configuration. So in this paper, those factors ate varied every unit river channel. The irnpnwed network-model is applied to the Takisato Dam basin. So, the sediment discharge at Takisato Dam is estimated. The animal volume of deposition could estimate extending conception of sediment discharge under dominant flow discharge. Estimated annual volume of deposition at sabo dams in the basin was verified with the value offield data.
