Abstract
Evacuation is one of the most important flood disaster mitigations. It is necessary to know the actual condition of evacuation for its simulation and planning. However, evacuation has different actual conditions according to flood plain conditions which are flood plain gradient, inundation depth, and so on. We have questionnaires with relation to actual evacuation in the two river basins, namely, the Mifune and the Rokkaku river. People there suffered considerable losses from flood in 1988 and 1990 respectively. We analyze the answers, then we get evacuation velocity, evacuation ratio, etc.
