Estimating the 2004 Indian Ocean tsunami wave height and period from boulders’ distribution at Pakarang Cape, Thailand

Kazuhisa Goto, Kiyohiro Okada, Fumihiko Imamura

    Research output: Chapter in Book/Report/Conference proceedingChapter

    1 Citation (Scopus)

    Abstract

    We propose a numerical method to estimate the local wave height and period of a tsunami from the distributions of boulders. The method was applied to boulders (<23 t) at Pakarang Cape, Thailand that were displaced from the reef slope onto the tidal bench by the 2004 Indian Ocean tsunami. They were deposited characteristically below the high-tide line, irrespective of size and no boulders were deposited on land. These features were used as the constraint of the calculation. We conducted over 10,000 cross-sectional calculations to satisfy above mentioned constraints, showing that the wave height and period at the shoreline were calculated to be 4–6 m and 18–37 min, respectively, which well concur with observed values. The input parameters for this calculation are the sizes and initial positions of boulders with seaward/landward limits, which are obtainable through the geological survey for historical and pre-historical tsunamis. This method is useful to estimate the local wave height and period of historical and pre-historical tsunamis from boulders reported throughout the world.

    Original languageEnglish
    Title of host publicationAdvances in Natural and Technological Hazards Research
    PublisherSpringer Netherlands
    Pages215-223
    Number of pages9
    DOIs
    Publication statusPublished - 2014

    Publication series

    NameAdvances in Natural and Technological Hazards Research
    Volume35
    ISSN (Print)1878-9897
    ISSN (Electronic)2213-6959

    Keywords

    • 2004 Indian Ocean tsunami
    • Boulder
    • Pakarang Cape
    • Tsunami

    ASJC Scopus subject areas

    • Global and Planetary Change
    • Geography, Planning and Development
    • Economic Geology
    • Computers in Earth Sciences
    • Management, Monitoring, Policy and Law

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