2022 Volume 78 Issue 2 Pages I_451-I_456
In recent years, the design offshore waves has been revised nationwide, and as a result, the design wave will become larger, which will increase the demand of wave-dissipating works. Currently, when estimating the amount of wave overtopping of a seawall in design, there is no choice but to use Goda's overtopping estimation chart, even if the conditions do not match. Matsushita et al. proposed a wave overtopping discharge estimation chart for wave and cover conditions corresponding to the example of implemented construction, but the results were obtained on a gentle slope beach with a slope of 1/30. Since there are many beaches with a seabed slope of 1/10 in Japan, verification on a steep slope beach is also necessary. This study conducted hydraulic experiments on a steep slope beach with the same crown height of the seawall and the wave absorber, and the fully cross-sectional covered type of seawall. The results were compared with those of Goda's chart and the effect of seabed slope was discussed. Furthermore, the applicability of the Integrated Formula of Overtopping and Runup Modeling (IFORM) to a wave-dissipating seawall was examined.
