Numerical analysis of tsunami flow around coastal dyke

T. Mikami, T. Shibayama

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

Abstract

Japan has a long stretch of coastal dykes along its shoreline to protect against storm surges, tsunamis and high wind waves. The 2011 Tohoku Earthquake and Tsunami caused serious damage to these coastal dykes. To improve the coastal dykes along the damaged coast and also to reconsider tsunami risks in other parts of the Japanese coast, it is important to understand the effect that a tsunami can have on a coastal dyke. The present paper thus aims to analyze a tsunami flow around a coastal dyke using a LES numerical model. To simulate both an impact phase and an overtopping phase of a tsunami flow, which were observed in the 2011 tsunami, a dam break flow and a pump flow were used to generate a tsunami-like flow in the numerical model. Based on the numerical results, the pressure and the velocity field around a coastal dyke were ascertained. These effects were considered to have a big influence on the dike failure in the 2011 tsunami, and thus it is recommended that the design of countermeasures should include a calculation of both of these parameters.

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
Pages654-659
Number of pages6
ISBN (Electronic)9789795301257
Publication statusPublished - 2020
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 dyke
  • LES model
  • Numerical analysis
  • Overtopping
  • Tsunami

ASJC Scopus subject areas

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

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