Field measurements and numerical modeling for the run-up heights and inundation distances of the 2011 Tohoku-oki tsunami at Sendai Plain, Japan

Kazuhisa Goto, Koji Fujima, Daisuke Sugawara, Shigehiro Fujino, Kentaro Imai, Ryouta Tsudaka, Tomoya Abe, Tsuyoshi Haraguchi

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We conducted an urgent field survey at the Sendai Plain to measure the run-up heights and inundation distances of the 2011 Tohoku-oki tsunami. We used GPS measurements because of the remarkably long inundation distances (ca. 5.4 km). We established an accurate measurement scheme using the far electric reference points (about 350 km). Using this method, we quickly measured 69 run-up heights within 3 days. The tsunami run-up heights and inundation distances varied mainly according to the local topography, ranging from 9.6 m at 0.4 km to 0.2 m at 5.4 km, respectively. Furthermore, artificial structures and topography played an important role in constraining the inundation limit. Our observations are important for future analyses using aerial and satellite imagery and numerical modeling in the area because the maximum inundation area might be underestimated in the images as a result of the subtle traces of the tsunami inundation, which were difficult to identify in the field. However, results show that numerical modeling might not reproduce minor inundation beyond the highway without sufficiently high-resolution topographic data because data for the modeling are usually rough, and the highway, small channels, and street gutters, which played an important role in local inundation, are too small a resolution to be recognized in the model.

Original languageEnglish
Pages (from-to)1247-1257
Number of pages11
Journalearth, planets and space
Volume64
Issue number12
DOIs
Publication statusPublished - 2012

Keywords

  • Run-up height
  • Sendai plain
  • The 2011 tohoku-oki tsunami

ASJC Scopus subject areas

  • Geology
  • Space and Planetary Science

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