Detached breakwaters effects on tsunamis around coastal dykes

Takahito Mikami, Mizuho Kinoshita, Shunya Matsuba, Shun Watanabe, Tomoya Shibayama

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

    3 Citations (Scopus)

    Abstract

    The Japanese coastal areas have a lot of different types of coastal structures with different purposes, and it is important to understand each structure's effects on tsunami. In the present paper, the authors focused on detached breakwaters effects on tsunami flow around coastal dykes with a field data investigation and laboratory experiments using a tsunami basin. The field data obtained from the 2011 Tohoku Earthquake and Tsunami showed that tsunami flow was not uniform along a coastal dyke with the specific arrangement of detached breakwaters. The laboratory experiments performed in a tsunami basin showed that a detached breakwater with a small detached breakwater parameter (distance from the shoreline/length of the opening) had a tsunami mitigation effect along the shoreline just behind the main body of the breakwater, but did not have a tsunami mitigation effect along the shoreline just behind the opening. The results obtained from the laboratory experiments agreed with the field data of the 2011 tsunami.

    Original languageEnglish
    Title of host publicationProcedia Engineering
    PublisherElsevier Ltd
    Pages422-427
    Number of pages6
    Volume116
    Edition1
    DOIs
    Publication statusPublished - 2015
    Event5th International Conference on Asian and Pacific Coasts, APAC 2009 - Singapore, Singapore
    Duration: 2009 Oct 132009 Oct 16

    Other

    Other5th International Conference on Asian and Pacific Coasts, APAC 2009
    CountrySingapore
    CitySingapore
    Period09/10/1309/10/16

    Keywords

    • Coastal dyke
    • Detached breakwater
    • Laboratory experiment
    • Tsunami

    ASJC Scopus subject areas

    • Engineering(all)

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  • Cite this

    Mikami, T., Kinoshita, M., Matsuba, S., Watanabe, S., & Shibayama, T. (2015). Detached breakwaters effects on tsunamis around coastal dykes. In Procedia Engineering (1 ed., Vol. 116, pp. 422-427). Elsevier Ltd. https://doi.org/10.1016/j.proeng.2015.08.307