On the Characteristics of the Damage Distribution and Verification of the Risk Assessment Model to the strong wind accompanied by typhoon : Focus on the Korean peninsula

Extreme events such as, typhoon, storm, heat wave, caused by the climate change are more frequently occurred in recently. Also, the trend of the extent of damage caused by these natural disasters is increasing rapidly (Samsung Loss Control Center, 2006; Park et al., 2005). Especially, the damages of typhoons can be effectively reduced by thorough preparation through prior disaster prevention activities before the approach of typhoon to the Korean Peninsula. In this study, the Korean Risk Assessment Model (KMA, 2009) adopted by Florida Public Hurricane Loss Model (FPHLM) (FDFS, 2005) is used to estimate the wind speed of 10m in the actual terrain (Va) of the typhoon, Kompasu, in 2010. We evaluated the application possibility of prevention aspect of disaster management by comparing estimated Va and hourly mean wind speed observed in 76 weather stations and also, calculates the 3-second gust (V3) based on improved risk model and examines the damage distribution of typhoon Kompasu. As a result, the calculated wind speed of the Korean Risk Assessment Model is reasonable to use for the prevention aspect of damage management. The distributions of V3 and damage cost by the track of typhoon found that the distribution of strong wind was similar to the damaged regions. The distribution of strong wind occurrence regions varied by the movement paths of typhoons. Furthermore, the damaged areas were also similar to the strong wind occurrence areas according to the routes of typhoons. The Busan and Gyeongnam provinces were most vulnerable to strong wind damages by typhoon during the studied period.

Keywords : Typhoon disaster, 3-second gust, Risk assessment, disaster prevention, damage management

Acknowledgements This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2011-0029809).