THEORETICAL STUDY ON THE RECOVERY PROCESS OF THE CONCAVE LANDFORM AFTER THE TSUNAMI

• VO Hoang Cong

  Dept. of Civil Engineering, Tohoku University

• TANAKA Hitoshi

  Dept. of Civil Engineering, Tohoku University

• MITOBE Yuta

  Dept. of Civil Engineering, Tohoku University

抄録

The 2011 tsunami flushed sand spit in front of the Nanakita River mouth, Sendai Coast, Miyagi Prefecture. It also caused severe erosion of sand barrier which is adjacent to the left side of the river mouth. These damages formed concave shoreline at this area after the tsunami. The morphological recovery of this area is presented through analysis of aerial photography. The recovery time of morphology is evaluated from analytical solution of one-line model. Results indicate that coastal structures at both ends have major impact on the shoreline evolution. Moreover, the dimensionless recovery time of morphology is depended on the ratio of total length of adjacent sandy coast to the concave width. A new analytical solution of one-line model, which describes the evolution of shoreline of concave landform bounded by rigid boundaries, has been introduced. Good agreement between measured shoreline positions and simulated results is also obtained.

収録刊行物

• 土木学会論文集Ｂ１（水工学）

  土木学会論文集Ｂ１（水工学） 71 (4), I_31-I_36, 2015

  公益社団法人 土木学会

キーワード

• Tsunami
• shoreline retreat
• recovery process
• one-line model
• analytical solution

詳細情報

• CRID: 1390001205354101248
• NII論文ID: 130005123574
• DOI: 10.2208/jscejhe.71.i_31
• ISSN: 2185467X
• Web Site: https://www.jstage.jst.go.jp/article/jscejhe/71/4/71_6/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可