Abstract
Physical and numerical experiments are carried out to clarify several fundamental characteristics of the two-dimensional behavior of a strong bore over a sloping beach, which has been observed to be caused by a tsunami. An approximate method (referred to as “a ray theory for bores” in this paper) is presented to analyze the two-dimensional behavior of bores. The analyses with the use of the method proposed in this study and Snell's law show that the behavior of strong bores over sloping beaches is quite different from that of waves.
