Debris Flow and Large-Scale Landslide Disaster Prevention Information Network

Alerts for massive landslides are primarily based on rainfall, supplemented by on-site monitoring data, with red and yellow warnings issued as appropriate after comprehensive evaluation. To prevent public misunderstanding and increased disaster management costs due to excessive deviation from current 『debris flow』 emergency response protocols, considering the established 『debris flow』 disaster prevention and emergency response methods, massive landslide potential areas are divided into two types based on the spatial relationship between the potential area and 『debris flow potential stream』 and the overlap of protected households. Warning issuance is implemented according to type: Type 1: Massive landslide protected households and 『debris flow potential stream』 protected households overlap. Type 2: Massive landslide protected households and 『debris flow potential stream』 protected households do not overlap.