Understanding the extreme tsunami inundation in Onagawa Town by the 2011 Tohoku Earthquake, Its effects in urban structures and coastal facilities

Bruno Adriano, Satomi Hayashi, Hideomi Gokon, Erick Mas, Shunichi Koshimura

    研究成果: Review article査読

    12 被引用数 (Scopus)

    抄録

    The 2011 Tohoku Tsunami is considered to be one of the most tragic events in Japan's disaster history, and represents an important milestone for the research community regarding the investigation of the characteristics of tsunami inundation. A thorough analysis of tsunami inundation was conducted using numerical modeling, and measurements from a video recorded from the rooftop of a building in Onagawa in Miyagi Prefecture. In this study, we analyze the destruction of buildings using numerical simulations and tsunami fragility functions. Numerical results for the locations at which the tsunami eyewitness video was recorded are compared with measurements. In addition, we considered the effect of the breakwater in Onagawa bay to evaluate its contribution to reducing overland tsunami inundation depths. The results of our simulations show that the maximum inundation depth due to the first incoming wave was over 16 m, and over 500 buildings were washed away with this first wave. This result is consistent with the video data. Further, we found that the breakwater, which was not originally designed against tsunami waves, reduced the maximum tsunami inundation depth at least by 2.0 m in Onagawa town.

    本文言語English
    論文番号1640013
    ジャーナルCoastal Engineering Journal
    58
    4
    DOI
    出版ステータスPublished - 2016 12 1

    ASJC Scopus subject areas

    • 土木構造工学
    • モデリングとシミュレーション
    • 海洋工学

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