Web GIS Based Typhoon Committee Disaster Information System for Typhoon Disaster Risk Management

Abstract

ABSTRACT Out of damage from natural disasters in recent decade, more than 60% is due to typhoon in Korea, and yearly damage has exceeded 10 billion USD as urbanization and development continue. Many local areas are affected by climate extremes such as typhoons and flash flood and great amount of coastal areas are exposed to flood risk by typhoon related winds and storm surges. These climatic impacts are expected to be severer and eventually impede development of the region. The main reasons for the high vulnerability to natural disaster are that great number of local cities are located in low land and vulnerable region and highly populated. As a scientific effort on disaster prevent and disaster risk reduction, statistical estimations of risk and regional vulnerability have been carried out. Typhoon trajectory is estimated from statistically method to determine the typhoon approaching region of interest and risk is also estimated from physical modeling of rainfall rate and wind speed, while regional vulnerability is statistically modeled from damage data of properties. This paper describes the development of typhoon risk assessment and application to Asia countries including Republic of Korea using Web GIS based technology. The system would be able to help decision makers to take informed actions during emergency situations of an approaching tropical cyclone.