上流域河道内からの土砂流出を考慮した流込み式水力発電所土砂流入現象の再現

抄録

Because the intake of the run-off-river hydro power plant faces the river, sediment in the riverbed flows in the waterway through intake when the flood occurs. At a very large-scale flood, power generation stops because of the inflow of sediment. In this study, we constructed the numerical model that reproduces this sedimentation process. This model is composed of two model, the model of upstream area and the model of river around intake of hydro power plant. The first model can evaluate sediment runoff from upstream channel bed. Secondary model can calculated bed variation around intake by using 2-dimensional numerical model. The result of sediment runoff is used as the upper boundary condition of this 2- dimensional model. This model is applied to the actual watershed of hydro power plant, and the calculated results by this model mostly agree with field survey.