DEVELOPEMENT OF LOCAL TSUNAMI FIRE RISK ASSESSMENT METHOD BASED ON THE TSUNAMI DEBRIS DISTRIBUTION SURVEY IN THE TOHOKU PACIFIC OCEAN EARTHQUAKE

Abstract

 In the Tohoku Pacific Ocean Earthquake, some tsunami evacuation buildings have been exposed to the risk of fires. It highlights a requirement of the tsunami evacuation buildings for the tsunami fires. Most of existing risk assessment methods of tsunami fire predicts macroscopically the number of fires and its scales within a large area. In order to estimate risk of tsunami fire for a certain building, it is essential to consider the circumstance of the local terrain and surrounding buildings. In this study, the relationships between tsunami fire risk and debris distribution was investigated analyzing aerial photos and LiDAR data after the tsunami. Furthermore, the statistical model for estimating the risk of localized fire at 100m mesh was proposed.