Abstract
It is rare case that local residents take evacuation, before sediment-related disaster occurred. It is pointed out the reason why people didn't take evacuation was because they had not experience of a sediment disaster, and they thought that their home was safer, it is called normalcy bias. Therefore, we analyzed the reason about the past disaster that it took evacuation, or no evacuation. As a result, it has been understood that it is important that the resident maintain consideration to the danger of sediment-related disaster. These supplement factor are the sediment-related disaster and disaster tradition, etc. We showed the only factor that did not evacuate is that local residents didn't recognize the danger of the sediment-related disaster. On the basis of analysis, we showed it about “the factor that local residents takes evacuation succeed". And we suggested that “the making of the check list to sense sediment-related disaster" and “the necessity of upbringing of the leader disaster prevention" were important.
