2008 Volume 16 Pages 105-110
Japan has large low-lying land on the coasts, in which large population and assets are accumulated. In the areas, inundation risks by storm surges are increased by sea level rise and typhoon strengthening due to the global warming. For estimating such risks, the author built up numerical models that describe probability of storm surge hitting, overtopping seawall and inundation in low-lying land. The model also covers Kuyshu region. Then, using the models, the author estimated inundation areas and inundated population corresponding to changes of sea level rise and of storm tide. According to the calculation, as sea level rise and storm tide increase, the inundation area and inundated population rather linearly increase. And also the result shows that the low-lying lands at North West part of Kyusyu, Kitakyusyu region, Suoh-Nada side, Beppu Bay side, South part of Miyazaki, Satsuma Peninsula have high storm surge inundation risks.