周期の長い津波の遡上・反射に伴うソリトン分裂特性に関する数値実験

抄録

It was reported in model experiments that the tsunami wave penetrated to very shallow water area is dispersed to solitary waves. A long period tsunami wave, however, cannot be generated in a usual experimental flume due to limitation of flume length or hydraulic scale effect. In this paper, the numerical experiments using a Boussinesq type wave transformation model are conducted to observe the deformation of the long period tsunami wave on a slope or a step reef.
The numerical experiments have shown that solitary waves dispersed in front of long period tsunami wave start to appear at the small depth on the slope and grow up on the step reef. The solitary waves in front of the reflected long period tsunami wave also grow up on the slope with negative gradient.