EXPERIMENTAL STUDY OF TSUNAMI PROPAGATION IN A MEANDERING CHANNEL

Abstract

The form of the tsunami run-up in rivers is divided into breaker bore and undular bore. It is important to understand the propagation characteristics of hydraulic bore in the meandering river reach in order to prevent the damage such as inundation for tsunami run-up. In this study, hydraulic bores generated by sudden gate opening are investigated in a meandering channel with the aim of clarifying the propagation characteristics of the bore, measuring the temporal variation in wave height. In the breaking bore, the wave height in a meandering channel is explained by the one-dimensional theoretical analysis of dam break flow and water surface profile in steady flow in a uniform curved channel. In the undular bore, because the wave height due to soliton fission is amplified in a meandering channel, it cannot be evaluated by the theoretical analysis.