河道の水理

[II-172] Experiments on propagation of breaking bore in a meandering river and its calculation

〇Daisuke Kobayashi¹, Tatsuhiko Uchida¹, Yoshihisa Kawahara¹ (1.Hiroshima University Graduate School of Advanced Science and Engineering)

Keywords:Shallow water equation, Breaking bore, Propagation speed, Reflected wave , Shock wave

It is important to understand the tsunami run-up in rivers for a disaster prevention. We aim to clarify the propagation characteristics of the breaking bores in a meandering river. The two-dimensional calculation was conducted using the shallow water equation for the bores in the meandering channel. In the case of a bore whose initial downstream water depth is close to Dry, the calculation result cannot be expressed due to the influence of reflected wave and shock wave. In the case of bore with sufficient downstream water depth, the experimental results are almost expressed. It is considered that the difference in the reproducibility is affected by the difference in the propagation speed.