河川流量データで降雨流出の地域特性を反映した土砂災害警戒避難基準雨量

抄録

Numerous sediment-related disasters have occurred in recent years. Hence, it is necessary to improve the predictability of such disasters so that we can develop effective warning and evacuation systems. For this purpose, we used the critical rainfall, based on the soil water index, calculated using a tank model of the entire country. We attempted to establish the critical rainfall based on real-time stream-flow data, but this index is as influential as the rainfall index obtained using the model presented in this study. The critical rainfall, which is based on stream-flow data, has the same precision as the soil-water index in the case of catchment areas less than 100 km².