Calculating Method of Wave Refraction for Tsunami Height Evaluation

Makoto NEMOTO; Hideharu SUGINO; Shiro TAKASE; Yoko IWABUCHI; Akio YAMAMOTO

doi:10.2208/kaigan.67.I_221

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

Online ISSN : 1883-8944
Print ISSN : 1884-2399
ISSN-L : 1883-8944

Calculating Method of Wave Refraction for Tsunami Height Evaluation

Makoto NEMOTO, Hideharu SUGINO, Shiro TAKASE, Yoko IWABUCHI, Akio YAMAMOTO

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Keywords: tsunami, source model, waveray method, refraction coefficient, fast prediction

JOURNAL FREE ACCESS

2011 Volume 67 Issue 2 Pages I_221-I_225

DOI https://doi.org/10.2208/kaigan.67.I_221

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Abstract

A waveray method has been used in past studies in order to evaluate tsunami hazards. Though this method is useful for it's convenience, it is difficult to predict quantitative tsunami heights because of the problems of calculating method, such as divergences of refraction coefficient in the cross-section areas of waverays. In this study, to be able to use waveray method for tsunami height prediction, (1) we modeled the shape of wave sources and investigated the relationship between fault parameters, (2) we improved the method of calculating the refraction coefficient with waveray method.

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