Characteristics of shoreline retreat due to the 2011 Tohoku earthquake and Tsunami and its recovery after three years

Keiko Udo, Kaoru Tojo, Yuriko Takeda, Hitoshi Tanaka, Akira Mano

研究成果: Chapter

4 被引用数 (Scopus)

抄録

We investigate the characteristics of shoreline retreat due to the 2011 Tohoku Earthquake and Tsunami and its recovery after 3 years over a wide area from Aomori Prefecture to Ibaraki Prefecture by analyzing the data of crustal deformation, tsunami height, and aerial photographs. There were no significant retreats where the seawall remained unbreached and where river mouths were distantly located regardless of the tsunami overflow depth over the seawall, indicating that the seawall condition during tsunami strikes is one of the most important factors that prevent serious shoreline retreat. After 3 years from the event, recovery of the eroded Ria coasts has been insignificant compared to the plain coasts. The key natural factors for the recovery are the upward crustal deformation after the earthquake and sediment supply from adjacent coasts or rivers after the tsunami; however, these could not be expected at the Ria coasts at least in near future.

本文言語English
ホスト出版物のタイトルCoastal Research Library
出版社Springer
ページ113-123
ページ数11
DOI
出版ステータスPublished - 2016

出版物シリーズ

名前Coastal Research Library
14
ISSN(印刷版)2211-0577
ISSN(電子版)2211-0585

ASJC Scopus subject areas

  • Oceanography
  • Management, Monitoring, Policy and Law
  • Nature and Landscape Conservation
  • Ecology

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