THE 2010 CHILEAN AND THE 2011 TOHOKU TSUNAMI WAVES IMPACT TO RIVERS IN THE TOHOKU REGION, JAPAN

Hitoshi Tanaka, Nguyen Xuan Tinh

Abstract


As a result when tsunami invades into river, it may not only a threat of damages to the banks but also cause the environmental problem such as inundation. Therefore, study of tsunami impacts to rivers becomes more important. The main objectives of this study are to investigate the tsunami wave propagation at different river morphologies based on real time measurements during the 2010 Chilean Tsunami and 2011 Tohoku Tsunami events. The aim is to learn empirically from the last extreme events tsunamis in order to suggest a better solution in terms of river and coastal management in the future. The analyzed results have been shown that the tsunami wave can be affected up to several tens kilometer upstream of a large river and the measured tsunami travel time inside the river is almost similar to the tsunami travel time calculated by using the long wave theory.

Keywords


2010 Chilean Tsunami; 2011 Tohoku Tsunami; river mouth; river upstream; tsunami wave impact

References


Abe K., 1986: Tsunami propagation in rivers of the Japanese Islands, Continental Shelf Research, Vol. 5, No.6, pp. 655-677.http://dx.doi.org/10.1016/0278-4343(86)90099-3

Mori, N., Takahashi, T., Yasuda, T. & Yanagisawa, H. , 2011. "Survey of 2011 Tohoku earthquake tsunami inundation and run-up," Geophysical Research Letters 38 doi:10.1029/2011GL049210.http://dx.doi.org/10.1029/2011GL049210

Roh M., Tinh N. X., Tanaka H., 2011: Effect of river mouth morphology on tsunami propagation ascending rivers, Journal of JSCE, Ser.A2 (Applied Mechanics),14, p.607-614.

Sato H., T. Shimamoto, A. Tsutsumi and E. Kawamoto, 1995: Onshore tsunami deposits caused by the 1993 Southwest Hokkaido and 1983 Japan Sea earthquakes, Pure and Applied Geophysics, Vol.144, No.3-4, pp. 693-717.http://dx.doi.org/10.1007/BF00874390

Tanaka H. and Tinh N. X., Dao N. X., 2011: Field measurement and numerical studies on the tsunami propagation into upstream of rivers, Proceedings of 34th IAHR Congress, Brisbane, Australia. (CD-ROM)

Tanaka H., K. Ishino, B. Nawarathna, H. Nakagawa, S. Yano, H. Yasuda, Y. Watanabe and K. Hasegawa, 2008: Field investigation of disasters in Sri Lankan Rivers caused by the 2004 Indian Ocean Tsunami. Journal of Hydroscience and Hydraulic Engineering, Vol.26, No.1, pp. 91-112.

Tanaka H., Tinh N.X., Umeda M., Hirao R., Pradjoko E., Mano A., Udo K., 2012: "Coastal and estuarine morphology changes induced by the 2011 Great East Japan Earthquake Tsunami," Coastal Engineering Journal, 54 (2012) http://dx.doi.org/10.1142/S0578563412500106

Tinh N. X., and Tanaka H., 2010: The influence of Chilean Tsunami wave in 2010 on rivers in the Tohoku District, Japan, Proceedings of International Sessions of Coastal Engineering Conference, JSCE, pp. 54-60.

Tsuji Y., T. Yanuma, I. Murata, and C. Fujiwara, 1991: Tsunami ascending in rivers as an undular bore, Natural Hazards, Vol.4, pp.257-266.http://dx.doi.org/10.1007/BF00162791

Yasuda H., 2010: A one-dimensional study on propagation of tsunami wave in river channels, Journal of Hydraulic Engineering, ASCE, Vol.136, No.2, pp.93-105.http://dx.doi.org/10.1061/(ASCE)HY.1943-7900.0000150


Full Text: PDF

Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.