Evaluation of Operational Optimization for Enhancing Flood Control Capacity of Dam Reservoirs in the Upper Tone River Basin

Key Points

• This research aims to evaluate the potential for improving flood control functions of existing dams in the Upper Tone River Basin.
• Conducted a case study on the Typhoon of 2019 in East Japan.
• Assumed alternative operations of six dams, excluding the unutilized Yamba Dam.
• Developed a flow release decision model based on predicted inflow.
• Performed numerical experiments to analyze the model's effectiveness.
• Optimized operations of six dams ensured flood control capacities equivalent to those of Yamba Dam.
• Measured water levels at Hakutojima closely matched real observations.
• Sensitivity analysis indicated optimal operations are effective with inflow predictions 54 hours for Shimonkubo Dam and 24 hours for others.