2025 Volume 81 Issue 16 Article ID: 24-16005
In this study, we visualized the storage functions of each countermeasure on a sub-basin scale for river basins in Toyama Prefecture and evaluated the effects of the basin flood control countermeasures at each target basin. We focused on seven countermeasures: paddy field dam, agriculture pond, school yard storage, storage of existing dams, preliminary release from dam reservoirs, preliminary release from agricultural dams, and the construction of new dams. Our findings indicate that the existing dam, paddy field dam, and school storage will be effective in the target river basins. Additionally, we evaluated the storage of existing dams in combination with the effects of other countermeasures, examining and comparing the effectiveness of these countermeasures at each basin. As a result, we identified effective countermeasures at the Oyabe, Jinzu, and Sho River basins. The method we used in this study does not involve any numerical experiments or detailed simulations, making it faster and easier way to understand the effectiveness of each countermeasure.
