A STUDY ON HUMAN DAMAGE IN EVACUATION FROM TSUNAMI CONSIDERING STREET-BLOCKADES CAUSED BY DESTROY OF BUILDINGS

Abstract

Damage estimation and disaster prevention plan for a Nankai megathrust earthquake which occurrence is assumed in the future have been formulated cabinet office of Japan based on lesson learned from the huge human damage caused by the tsunami of The Great East Japan Earthquake in 2011. Damage estimation for earthquake and tsunami is usually evaluated independently. For the damage estimation by tsunami, the human damage in evacuation from tsunami has been carried out. However, street-blockades have not been considered in many studies and damage estimations. When evacuation routes are changed by the street-blockades, configuration of the human damage in evacuation from tsunami seems to be different in no street-blockades. To evaluate total damage in whole area, unified treatment of the human damage by the both disasters seems to be significant. This study presents an evaluation method of human damage in evacuation from tsunami considering street-blockades using area-wide mesh. The author’s method considering variances of tsunami run-up speed and walking speed is used to the evaluation. The street-blockades of evacuation routes are evaluated by using fragility curves of buildings for earthquake. Moreover, the difference in configuration of the human damage by consider the street-blockades and no blockades is discussed.