ANALYSIS OF FLOODING DIRECTIONS OF THE 2011 EARTHQUAKE TOHOKU TSUNAMI

Hiroshi Sanuki, Tomohiro Takagawa, Yoshimitsu Tajima, Shinji Sato

Abstract


In contrast to many post-tsunami studies focusing on tsunami inundation heights, this study focuses mainly on tsunami flooding flow directions, which may have more direct impact on damages of structures. Based on tilted poles and trees in the inundated area, this study collected data of tsunami flow directions at Rikuzen-takata, Ootsuchi, and Naraha on the east coast of Japan. Numerical tsunami inundation model was then applied to each of these sites to investigate the relationship between simulated time-varying flow patterns and observed flow directions. Such link is essentially important to deepen our understandings on the dynamics of the inundation tsunami flow.

Keywords


2011 Tohoku Tsunami; Numerical Simulation; Flow Direction; Rikuzen-takata; Ootsuchi; Naraha

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References


The 2011 Tohoku Earthquake Tsunami Joint Survey Group. The 2011 off the Pacific coast of Tohoku Earthquake Tsunami Information (http://www.coastal.jp/tsunami2011/).

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H. Sanuki, R. Takemori, Y. Tajima and S. Sato. 2013. Study on tsunami flooding in river based on video images and numerical simulation. Proceedings of Coastal Engineering, JSCE, 69:196-200.

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DOI: https://doi.org/10.9753/icce.v34.currents.13