Present and future tsunami and storm surge protections in Tokyo and Sagami bays

T. Shibayama, K. Ohira, T. Takabatake

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

On March 11, 2011, a large earthquake that occurred offshore the northeast coast of Japan generated a large tsunami which devastated extensive areas of the Tohoku coastline and large casualties were recorded. Based on the experiences, coastal protection works in Japan are now in the process of modifications. In the present paper, Tokyo and Kanagawa are taken as examples and new methodologies are explained in the area. For the case of storm surge, a new model is applied to predict the future behavior of storm surge. For the case of tsunami, Genroku Kanto Earthquake (1703), Keicho Earthquake (1605) and Meiou Tokai Earthquake (1498) were mainly discussed in the numerical analysis, since tsunamis caused by these three earthquakes gave strong damages to coastal area of Kamakura, and left influences to Yokohama and Tokyo. New tsunami flood maps over coastal land area based on numerical simulations were presented to the residents of coastal region on April 2012 in Kanagawa prefecture. For Kamakura area, Keicho Earthqueke takes 90 minutes to reach the Kamakura coast and the height is over 12 m. But for the case of Genroku Kanto earthquake it takes 25 minutes and the height is 8 m. It appears that there are two different types of risk, 1) high wave comes but we have time for evacuation and 2) relatively small wave comes quickly and time is limited for evacuation. New countermeasures including soft and hard techniques are also required.

Original languageEnglish
Title of host publicationProceedings of the 7th International Conference on Asian and Pacific Coasts, APAC 2013
EditorsDadang A. Suriamihardja, Tri Harianto, M. Asad Abdurrahman, Taufiqur Rahman
PublisherHasanuddin University Press
Pages764-766
Number of pages3
ISBN (Electronic)9789795301257
Publication statusPublished - 2020
Externally publishedYes
Event7th International Conference on Asian and Pacific Coasts, APAC 2013 - Bali, Indonesia
Duration: 2013 Sep 242013 Sep 26

Publication series

NameProceedings of the 7th International Conference on Asian and Pacific Coasts, APAC 2013

Conference

Conference7th International Conference on Asian and Pacific Coasts, APAC 2013
CountryIndonesia
CityBali
Period13/9/2413/9/26

Keywords

  • Coastal protection
  • Storm surge
  • Tsunami

ASJC Scopus subject areas

  • Aquatic Science
  • Ecology, Evolution, Behavior and Systematics
  • Ecology

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