Abstract
On April 18, 2015, field observation was carried out on the Kenbutsu coast in front of Katanagiri Shrine, which is located on the south shore of Tateyama Bay. A park was constructed by land reclamation in a shallow sea with reefs and narrow sandy beaches, and a seawall was built in front of the reclaimed land. Near the seawall surrounding the park, the backyard of the seawall was stable at a place with rocky reefs in front, but in an area with a large water depth between the rocks, wave overtopping was severe and sinking of the ground was found. In this study, the seabed topography was measured near the seawall together with the observation of wave overtopping. Then, the wave overtoppoing was calculated by using the VOF method.
