Innovation for Resilient Coastal Structures to Reduce Tsunami Disaster
Kochi University of Technology
Tosayamada, Kami, Kochi 782-8502, Japan
The Great East Japan Earthquake Tsunami on March 11, 2011, caused unprecedented damage mainly in northeast Japan. This paper introduces the characteristics of the tsunami and resultant damage. The mechanism of the breaching of coastal structures and the effect of surviving structures on damage reduction in land are discussed. Then, a two-level tsunami mitigation concept, proposed and adopted by a committee hosted by the Government for recovery and reconstruction, is introduced. Within this framework, coastal structures are required to be resilient to external forces exceeding the design level. Various technologies that have been developed based on experience and research after the tsunami are introduced.
-  S. Sato (Ed.), “Special Anniversary Issue on the 2011 Tohoku Earthquake Tsunami,” Coastal Engineering J., Vol.54, No.1 (12 papers), 2012.
-  Joint Survey Group for Great East Japan Earthquake tsunami, http://www.coastal.jp/ttjt/ [accessed April 30, 2011]
-  H. Watanabe, “List of Disastrous Tsunamis in Japan,” Univ. Tokyo Press, pp. 238 1998 (in Japanese).
-  Technical committee on prevention and reduction of earthquakes and tsunamis, “Basic Plan for Coastal Conservation,” Kochi Prefecture, 2013 (in Japanese).
-  Y. Kotake and M. Isobe, “Experimental study on pressure distribution along landward slope of coastal dike due to tsunami overflow,” J. JSCE, Ser. B2, Vol.68, pp. 891-895, 2012 (in Japanese).
-  Kochi pref., http://bousaimap.pref.kochi.lg.jp/ [accessed November 10, 2015]
This article is published under a Creative Commons Attribution-NoDerivatives 4.0 Internationa License.