BACKFILLING OF SANDY COAST BREACHING AFTER THE 2011 TSUNAMI

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

doi:10.9753/icce.v35.sediment.11

No. 35 (2016), Sediment Transport and Morphology

No. 35 (2016)

BACKFILLING OF SANDY COAST BREACHING AFTER THE 2011 TSUNAMI

Sediment Transport and Morphology

https://doi.org/10.9753/icce.v35.sediment.11

Published 2017-06-23

Vo Cong Hoang⁺⁻
Hitoshi Tanaka⁺⁻
Yuta Mitobe⁺⁻
Keiko Udo⁺⁻
Akira Mano⁺⁻

Vo Cong Hoang

Department of Hydraulic Structure, Thuyloi University-Southern Campus, 02 Truong Sa, Ward 17, Binh Thanh District, Ho Chi Minh City

Hitoshi Tanaka

Department of Civil Engineering, Tohoku University, 6-6-06 Aoba, Sendai 980-8579

Yuta Mitobe

Department of Civil Engineering, Tohoku University, 6-6-06 Aoba, Sendai 980-8579

Keiko Udo

International Research Institute of Disaster Science, Tohoku University, 6-6-11 Aoba, Sendai

Akira Mano

Emeritus Professor, International Research Institute of Disaster Science, Tohoku University, 6-6-11 Aoba, Sendai

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Keywords

Tsunami
Yamamoto Coast
concave shoreline
analytical solution
one-line model

How to Cite

Hoang, V. C., Tanaka, H., Mitobe, Y., Udo, K., & Mano, A. (2017). BACKFILLING OF SANDY COAST BREACHING AFTER THE 2011 TSUNAMI. Coastal Engineering Proceedings, 1(35), sediment.11. https://doi.org/10.9753/icce.v35.sediment.11

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 one-line 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.

https://doi.org/10.9753/icce.v35.sediment.11

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References

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BACKFILLING OF SANDY COAST BREACHING AFTER THE 2011 TSUNAMI

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