津波・高波(2)

[II-87] Visualization experiment on generation process of splashes due to wave run-up at a vertical seawall

〇Shoki Yamada¹, Kentaro Koga¹, Masaru Yamasiro¹, Mituyosi Kodama¹ (1.KYUSHU University)

Keywords:the wave run-up splashes, Hydraulic model experiment, Visualization experiment, Image analysis, Wave-making tunnel

In Japan, violent splash run-ups are sometimes generated at the front face of the coastal structures by intense incoming waves. However, the data on the generation and dispersion process of splashes are insufficient, and the generation process of splashes is still unclear. In this study, model experiments were conducted using a two-dimensional wind-wave flame to clarify the generation process of splashes due to wave-overtopping. The main conclusions is in the process of a wave run-up, relatively large water mass is swelled up due to wind like a balloon, and consequently bursts. The burst generates a large number of small splashes.