INFLUENCE OF WIND VELOCITY ON WAVE RUN-UP UNDER IRREGULAR WAVE ACTION

Abstract

 This study clarified the relationship between wind speed and run-up height of irregular waves on a coastal revetment focusing on the presence or absence of wave breaking in front of the revetment. In the study, a two-dimensional wave tank with a wind tunnel was used to measure the wave run-up height under wind blowing conditions. The characteristic of wave run-up height differs depending on the existence of wave breakings in front of the revetment. Under the non-wave breaking condition, the relative run-up height increases exponentially as the wind speed increases. On the other hand, the wind speed shows almost no influences on wave run-up height under the wave breaking condition. Increasing or decreasing characters of wave run-up height against the steepness of incident wave differ depending on the wind speed. The probability distribution of the wave run-up height under wind blowing conditions follows Rayleigh distribution.