SPATIO-TEMPORAL ANALYSIS OF THE START OF TSUNAMI EVACUATION IN THE 2011 TOHOKU TSUNAMI IN SHIDUGAWA, MINAMISANRIKU

Abstract

 Many people could/did not evacuate from the 2011 Tohoku Tsunami. Solving problems of the evacuation start is very important to mitigate human losses due to tsunami disasters. In the present paper, we have been developing the evacuee generation simulation based on the viewpoint in which various agents in our society play an important role in the start of tsunami evacuation. In this research, using “Digital Archiving of the Great East Japan Earthquake Survey” and “Evacuee Generation Model”, we analyzed the start of tsunami evacuation in the 2011 Tohoku tsunami in Shidugawa, Minamisanriku. The results revealed that (1) many residents in their offices or stores headed evacuation sites after they went back home, (2) most residents move outwardly from the center of the town, and (3) residents in the suburbs of the town could start evacuation easily because of the reality of imminent emergency which prompts the need for evacuation constructed by many residents.