Abstract
In order to examine the countermeasures for reservoir sedimentation, it is required to predict the effect of them. As a technical tool for that, the one-dimensional movable bed numerical model is considered to be effective. But its reproducibility has not been verified sufficiently by using field observed data. In this study, we carried out calculation of the sediment accumulating and scouring phenomena in Sabaishigawa reservoir by non-uniform particles movable bed model and conducted verification in comparison with the field measured data. As a result, it is revealed that the sedimentation configurations are well predicted by numerical model with two important factors as follows. The first one is the input data of each sediment particle inflow volume estimated from the field measured data of past sedimentation. The second is the erosion rate formula of fine sediment calibrated by the result of physical experiments using the sediment materials collected at the reservoir.
