Abstract
In recent years, frequent extreme heavy rainfalls exceeding planning levels have been causing shortage of flood control capacity of dams and serious flood damages as a result of extreme-flood control operations that allows the inflowing flood to continue flowing downstream in an unregulated manner. While the scale of flood damage is expected to increase due to climate change, new construction of dams is becoming increasingly difficult. Therefore, more effective operations of existing dams are essential to protect assets of the beneficiary area from floods. This paper propose a dam operation method which will minimize damages in the flood area by the preliminary discharge operation and optimization of the maximum discharge volume based on precipitation forecasts using the recently significantly improved Weather Research and Forecasting Model (WRF). We examined past flood data and verified the effectiveness of integrated management of reservoir storage volume both for flood control and water utilization.
