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JDR Vol.8 No.4 pp. 612-625
(2013)
doi: 10.20965/jdr.2013.p0612

Paper:

Damages to Shore Protection Facilities Induced by the Great East Japan Earthquake Tsunami

Fuminori Kato, Yoshio Suwa, Kunihiro Watanabe,
and Satoshi Hatogai

National Institute for Land and Infrastructure Management, Ministry of Land, Infrastructure, Transport and Tourism, Asahi 1, Tsukuba, Ibaraki 305-0804, Japan

Received:
February 22, 2013
Accepted:
May 8, 2013
Published:
August 1, 2013
Keywords:
tsunami, shore protection facilities, coastal dikes, the Great East Japan Earthquake
Abstract

After clarifying high-speed flow, pressure change, and scouring using model experiments when tsunamis overflow coastal dikes, the damage to coastal dikes caused during the Great East Japan Earthquake is summarized and the mechanism of categorized damage patterns of coastal dikes is discussed. Multiple logistic regression analysis is performed using external force acting affecting damaged coastal dikes and structure specifications, and overflow depth and armor width of landward toes are extracted as elements influencing such damage. Based on these results, structure innovation that persistently exerts effects during tsunami overflow is clarified for coastal dikes.

Cite this article as:
F. Kato, Y. Suwa, K. Watanabe, and <. Hatogai, “Damages to Shore Protection Facilities Induced by the Great East Japan Earthquake Tsunami,” J. Disaster Res., Vol.8, No.4, pp. 612-625, 2013.
Data files:
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Last updated on Jan. 18, 2019