Tsunami ascending in rivers as an undular bore |
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| Authors: | Yoshinobu Tsuji Takashi Yanuma Isao Murata Chizuru Fujiwara |
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| Institution: | (1) Earthquake Research Institute, University of Tokyo, Yayoi 1-1-1, 113 Bunkyo-Ku, Tokyo, Japan |
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| Abstract: | At time of the 1983 Japan Sea tsunami, waves in the form of a bore ascended many rivers. In some cases, bores had the form of one initial wave with a train of smaller waves, and in other cases, such a wave train did not appear and only a step with a flat water surface behind was observed. In the present study, it is clarified that both undular-type and nonundular-type bores can be recognized as solutions of the KdV-Burger's equation which was introduced by Johnson in 1972. Numerically obtained analytical solutions and results of laboratory experiments are compared. |
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| Keywords: | Bore undular bore hydraulic jump KdV-Burgers equation nonlinear and dispersive wave with energy dissipation riverwall planning breaking waves phase plane method Runge-Kutta-Gill's method amplification of tsunami soliton dispersion |
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