TY - GEN
T1 - Numerical analysis of tsunami flow around coastal dyke
AU - Mikami, T.
AU - Shibayama, T.
N1 - Funding Information:
The present work was supported by the Grants-in-Aid for Scientific Research (B) No.22404011 from the Japan Society for the Promotion of Science (JSPS) and the “Disaster Analysis and Proposal for Rehabilitation Process for the Tohoku Earthquake and Tsunami” from Waseda University Research Initiatives. Some of the figures were generated using the Generic Mapping Tools (Wessel and Smith 1998).
Publisher Copyright:
© APAC 2013.All rights reserved.
PY - 2020
Y1 - 2020
N2 - Japan has a long stretch of coastal dykes along its shoreline to protect against storm surges, tsunamis and high wind waves. The 2011 Tohoku Earthquake and Tsunami caused serious damage to these coastal dykes. To improve the coastal dykes along the damaged coast and also to reconsider tsunami risks in other parts of the Japanese coast, it is important to understand the effect that a tsunami can have on a coastal dyke. The present paper thus aims to analyze a tsunami flow around a coastal dyke using a LES numerical model. To simulate both an impact phase and an overtopping phase of a tsunami flow, which were observed in the 2011 tsunami, a dam break flow and a pump flow were used to generate a tsunami-like flow in the numerical model. Based on the numerical results, the pressure and the velocity field around a coastal dyke were ascertained. These effects were considered to have a big influence on the dike failure in the 2011 tsunami, and thus it is recommended that the design of countermeasures should include a calculation of both of these parameters.
AB - Japan has a long stretch of coastal dykes along its shoreline to protect against storm surges, tsunamis and high wind waves. The 2011 Tohoku Earthquake and Tsunami caused serious damage to these coastal dykes. To improve the coastal dykes along the damaged coast and also to reconsider tsunami risks in other parts of the Japanese coast, it is important to understand the effect that a tsunami can have on a coastal dyke. The present paper thus aims to analyze a tsunami flow around a coastal dyke using a LES numerical model. To simulate both an impact phase and an overtopping phase of a tsunami flow, which were observed in the 2011 tsunami, a dam break flow and a pump flow were used to generate a tsunami-like flow in the numerical model. Based on the numerical results, the pressure and the velocity field around a coastal dyke were ascertained. These effects were considered to have a big influence on the dike failure in the 2011 tsunami, and thus it is recommended that the design of countermeasures should include a calculation of both of these parameters.
KW - Coastal dyke
KW - LES model
KW - Numerical analysis
KW - Overtopping
KW - Tsunami
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M3 - Conference contribution
AN - SCOPUS:84957697308
T3 - Proceedings of the 7th International Conference on Asian and Pacific Coasts, APAC 2013
SP - 654
EP - 659
BT - Proceedings of the 7th International Conference on Asian and Pacific Coasts, APAC 2013
A2 - Suriamihardja, Dadang A.
A2 - Harianto, Tri
A2 - Abdurrahman, M. Asad
A2 - Rahman, Taufiqur
PB - Hasanuddin University Press
T2 - 7th International Conference on Asian and Pacific Coasts, APAC 2013
Y2 - 24 September 2013 through 26 September 2013
ER -