Abstract
A Flaring Shaped Seawall (FSS) can drastically reduce a crest height and wave overtopping quantity in comparison with a conventional upright one. In this study, a series of hydraulic experiments were carried out using a two-dimensional flumeto apply the FSS to practical use. As a result, armor stones on the rubble moundfoundation were stabilized for a series of irregular waves. Flow velocities of wave in front of the FSS were measured to investigate scour. These were almost same as those of the upright seawall, and an average value of flow velocity indicated in the direction of onshore. Furthermore an impulsive breaking wave pressureby regular wave was measured and was about 4.5 times larger than one by Goda's formula. Finally, a diagram to estimate the crest height and wave overtopping rate of the FSS was made.
