ESTIMATION OF SEVERAL TYPHOON SCALES, STORM SURGE INUNDATION AND LEAD TIME FOR EVACUATION

TAKESHITA Tetsuya, SUZUYAMA Katsuyuki, SUWA Yoshio, HIMENO Kazuki

doi:10.2208/kaigan.71.i_217

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Other Title

気象庁台風区分に対応する想定台風設定と高潮浸水，リードタイムの試算
キショウチョウタイフウクブンニタイオウスルソウテイタイフウセッテイトタカシオシンスイ,リードタイムノシサン

Abstract

In Japan, storm surge hazard maps were made in some areas. But only few attempts had so far been made at the estimation of storm surge inundation depending on several typhoon scales and the consideration of lead time in order to evacuate from the typhoon. The purpose of this study is to estimate storm surge inundation corresponding to typhoon scales and intensities announced by the Japan Meteorological Agency and to consider the lead time for evacuation at the Tokyo Bay area and its surrounding area.<br> As a result, the assumption typhoon which had a central atmospheric pressure of 910 hectopascals and was called “the Muroto typhoon grade” corresponded to “a very strong typhoon”. The typhoon's inundation became larger than any other typhoon scales of this study. The radius of the maximum cyclostrophic wind speed was the longer, a typhoon course which had the highest tidal level was the more westerly. Sequential wind velocity distribution was made in the process of the estimation of storm surge inundation. Using the wind velocity distribution, the arrival time of the strong winds area more than wind velocity 15 m/s was calculated as information to help setting of the refuge completion time.

Journal

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 71 (2), I_217-I_222, 2015

Japan Society of Civil Engineers

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