Barrier spit recovery following the 2004 Indian Ocean tsunami at Pakarang Cape, southwest Thailand

Naoto Koiwa, Mio Takahashi, Shuhei Sugisawa, Akifumi Ito, Hide aki Matsumoto, Charlchai Tanavud, Kazuhisa Goto

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)

    Abstract

    The 2004 Indian Ocean tsunami had notable impacts on coastal landforms. Temporal change in topography by coastal erosion and subsequent formation of a new barrier spit on the nearshore of Pakrang Cape, southeastern Thailand, had been monitored for 10 years since 2005 based on field measurement using satellite images, high-resolution differential GPS, and/or handy GPS. Monitored topography data show that a barrier island was formed offshore from the cape several months after the tsunami event through progradation of multiple elongated gravelly beach ridges and washover fan composed of coral gravels. Subsequently, the barrier spit expanded to the open sea. The progradation and expansion were supported by supply of a large amount of coral debris produced by the tsunami waves. These observations provide useful data to elucidate processes of change in coastal landforms after a tsunami event. The 2004 Indian Ocean tsunami played an important role in barrier spit evolution over a period of at least a decade.

    Original languageEnglish
    Pages (from-to)314-324
    Number of pages11
    JournalGeomorphology
    Volume306
    DOIs
    Publication statusPublished - 2018 Apr 1

    Keywords

    • Beach ridge
    • GPS
    • Microlandform
    • Recovery
    • Washover fan

    ASJC Scopus subject areas

    • Earth-Surface Processes

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