台風の風速と被害との関係について

Abstract

The basic surface wind was computed from the gradient wind with modifications by typhoon translation and supergradient wind inside the eye.For the data of Typhoon 9119 (MIREILLE) , a good relationship between the maximum basic surface wind speed and the rate of wooden house damages was obtained with the correlation coefficient of 0.91. Using this method, a hindcast of wind damages of Typhoon 9019 (FLO) was executed and a significant result was obtained. The basic surface wind was also related well to the rate of electric pole dameges by Typhoon 9119 with the correlation coefficient of 0.54. Therefore, the basic surface wind is considered to be valuable for the prediction of disasters by severe winds in typhoons hitting Japan. In the near future, two methods for prediction of damages by high wind in typhoons will be developed. One of the methods can be used for the prediction of wind disasters at the real time, and the other for the prediction of disaters expected in such a long period as 100 years for design purpose.