2022 Volume 78 Issue 2 Pages 45-57
The heavy rain event of July 2020 caused flooding and landslides mainly in the south of Kumamoto Prefecture, resulting in a huge disaster of 86 dead and missing. We conducted a questionnaire survey on a change in evacuation awareness that change over time according to river conditions and awareness of disasters in Hitoyoshi City, Kuma Village, and Sakamoto Town, Yatsushiro City in Kumamoto Prefecture, which suffered the most damage. Then, using the results of these questionnaires, we estimated a decision making model of evacuation based on situational awareness that changes with the progress of heavy rain. From the analysis of the questionnaire results and the evacuation awareness model, as for the factors that encourage horizontal evacuation, the stimuli that promote situational awareness such as evacuation calls and river flooding were more significant than disaster preparedness such as confirmation of hazard maps and confirmation of evacuation sites and evacuation information such as evacuation advisories and evacuation orders.
