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Numerical analysis of boulder transport by the 2004 Indian Ocean tsunami at Pakarang Cape, Thailand

Goto, Kazuhisa ; Okada, Kiyohiro ; Imamura, Fumihiko

Marine geology, 2010, Vol.268(1), pp.97-105 [Evalué par les pairs]

  • Titre :
    Numerical analysis of boulder transport by the 2004 Indian Ocean tsunami at Pakarang Cape, Thailand
  • Auteur(s) : Goto, Kazuhisa ; Okada, Kiyohiro ; Imamura, Fumihiko
  • Notes : At Pakarang Cape, Thailand, we conducted field observations and numerical modeling of the spatial and grain size distributions and sources of boulders deposited by the 2004 Indian Ocean tsunami; the boulders are a very rare example of boulders for which a tsunami origin is well confirmed. Numerical modeling of the tsunami's boulder transport revealed that the grain size and spatial distributions of boulders are explainable by the initial distribution of boulders at the source and the tsunami's local behavior, which is controlled strongly by the tsunami hydrodynamic features and local topography. Soon after the bore front reached at the beach, the tsunami's hydraulic force on the tidal bench decreased suddenly below the critical force necessary to displace the boulder because of the seaward propagation of the reflected wave that had been generated at the beach slope. Consequently, all boulders were deposited below the high-tide line and subsequently concentrated at the western...
  • Liens : Marine geology, 2010, Vol.268(1), pp.97-105 [Evalué par les pairs]
  • Sujets : 2004 Indian Ocean Tsunami ; Tsunami ; Boulder ; Pakarang Cape ; Thailand ; 2004 Indian Ocean Tsunami ; Tsunami ; Boulder ; Pakarang Cape ; Thailand ; Oceanography ; Geology
  • Langue : Anglais
  • Type : Article
  • ISSN: 0025-3227 ; E-ISSN: 1872-6151 ; DOI: 10.1016/j.margeo.2009.10.023
  • Source : ScienceDirect Journals (Elsevier)
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