1991年台風19号による風と被害との関係について

Abstract

Severe storm of Typhoon 9119 (MIREILLE) caused damages to about 680 thousand houses over the Japanese Islands11.The distribution of the surface wind speed of this typhoon was estimated from the objectively analyzed pressure pattern2), in consideration of the characteristics of a radial wind distribution and the surface roughness.The estimated wind speeds represent well the surface wind speeds observed at the weather stations.The damage rate of houses is not clearly related with the maximum estimated wind speed, but the frequency of loss occurrences of houses, F1, is related closely with the maximum wind speed, Vs, with the correlation coefficient of 0.71.F1increases in proportion to the 5.5th power of Vs and the relation between them is represented as F1=3.9 x 10-4 Vs55, where F1 and Vs are measured in % and msー1, respectively.The result obtained in this study will be applied to simulate the house damage distribution by severe thyohoons in a succeeding study.