On Wave Runup Height and Overtopping Quantity of Gentle Slope Revetment Placed behind Artificial Reef

Abstract

Laboratory experiments were conducted in a wave flume to investigate the runup height and volume of overtopped water changed the water depth at the toe and the crest height of a gentle slope revetment. A time-averaged numerical wave model and a semi-empirical runup and overtopping model were applied to the computation of the runup height and overtopping rate. The results of the experiments showed that the long-period wave measured behind the artificial reef influenced wave runup and overtopping. The runup and overtopping model was modified to take into account the influence of the long-period wave. The numerical model predicted the overtopping rate reasonably well in the case of low crest height of the revetment and relatively large overtopping rate.