Backfilling of sandy coast breaching after the 2011 Tsunami

Vo Cong Hoang, Hitoshi Tanaka, Yuta Mitobe, Keiko Udo, Akira Mano

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Breaching of sandy coast was commonly observed on Yamamoto Coast, southern Miyagi Prefecture during the 2011 tsunami. That made the shoreline having concave shape after the tsunami. Concave shoreline is bounded by two headlands. The recovery of concave shoreline is discussed through the analysis of satellite images. The relationship between dimensionless elapsed time with dimensionless recovery of shoreline at the central line of concave portion, and dimensionless of area of backfilling in the concave portion are studied based on analytical solutions of the oneline model. For those two relationships, results obtained for case with rigid boundaries is asymptotic when the ratio between length of the bounded coast and width of concave portion is getting larger. Good agreement between measured data and theoretical results can be obtained.

Original languageEnglish
Title of host publicationProceedings of the 35th International Conference on Coastal Engineering, ICCE 2016
EditorsPatrick Lynett
PublisherAmerican Society of Civil Engineers (ASCE)
ISBN (Electronic)9780989661133
Publication statusPublished - 2016
Event35th International Conference on Coastal Engineering, ICCE 2016 - Antalya, Turkey
Duration: 2016 Nov 172016 Nov 20

Publication series

NameProceedings of the Coastal Engineering Conference
Volume35
ISSN (Print)0161-3782

Other

Other35th International Conference on Coastal Engineering, ICCE 2016
CountryTurkey
CityAntalya
Period16/11/1716/11/20

Keywords

  • Analytical solution
  • Concave shoreline
  • One-line model
  • Tsunami
  • Yamamoto Coast

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Ocean Engineering
  • Oceanography

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