JAPAN'S INNUNDATION RISK MAP OF STORM SURGE UNDER GLOBAL WARMING AND INNUNDATION DAMAGE FUNCTION OF COASTAL AREA

Abstract

Sea level rise and intensified storm caused by global warming increase inundation risk of storm surge. The auther assessed inundation damage risks of storm surge on many areas, and put them on a map of Japan. The map shows that Three Major Bays, Seto Inland Sea and Ariake - Yatsushiro Sea region have high risk and that risk areas are limited in Hokuriku, Tohoku and Hokkaido region. Using the inundation damage model, the author calculated inundation damages as functions of inundation height at various regions. Obtained relationship between damages and inundation height showed that the damages rapidly increase with inundation height up to T. P. 5m in the regions of Tokyo bay, Osaka bay and Seto Island sea, whereas damages are relatively lower and increase up to inundation height of T. P. 10m in the regions of Ibaraki - Kujukurihama and Nankai - Tonankai.