Relationship between the maximum extent of tsunami sand and the inundation limit of the 2011 Tohoku-oki tsunami on the Sendai Plain, Japan

Tomoya Abe, Kazuhisa Goto, Daisuke Sugawara

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

This paper focuses on the relationship between the maximum extent of sandy tsunami deposits and inundation distance of the 2011 Tohoku-oki tsunami. Inundation limits of the Tohoku-oki tsunami were assessed over seven shore-normal transects along the Sendai Coastal Plain. Inundation distances were found to range from 0.6 to 4.0. km. At the maximum extent of the tsunami deposit, the sand unit ranged in thicknesses from 0.1 to 4.0. cm. The maximum limit of the ≥ 0.5 cm thick sand layer extended to over 90% of the inundation distance where the inundation distance was less than 2.5. km. This observation is consistent with previous studies that examined characteristics of recent tsunami events that had inundation distances of at least 2. km. The maximum limit of the ≥ 0.5 cm thick sand layer extended to 3. km (57-76% of the inundation distance) where the inundation distance was more than 2.5. km. Our results are important for estimating paleo-tsunami inundation distances based on the landward extent of sand deposits and valuable for the assessment of future tsunami risks in other coastal areas in the world, which have been devastated by huge tsunamis in the past.

Original languageEnglish
Pages (from-to)142-150
Number of pages9
JournalSedimentary Geology
Volume282
DOIs
Publication statusPublished - 2012 Dec 30

Keywords

  • 2011 Tohoku-oki tsunami
  • Inundation limit
  • Maximum extent of sand
  • Sendai Coastal Plain
  • Tsunami deposit

ASJC Scopus subject areas

  • Geology
  • Stratigraphy

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