EXPERIMENTS ON THE EFFECTS OF RIVER LEVEE BREACHES ON TSUNAMI RUN-UP IN RIVER

Abstract

Serious damage was caused by tsunami run-up in river in the Great East Japan Earthquake. A large scale experiment modeled Kitakami River was carried out to clarify the effect of river levee breaches caused by the tsunami. The run-up height and speed were compared. As the result, the river levee breach would lower the run-up height and speed of upper stream of the river. These trends could be represented by the numerical simulation using the nonlinear long wave theory.