On the northern part of the Shimizu coast in Suruga Bay, beach erosion has been severe because of lack of longshore sand supply and offshore discharge of littoral sand through the steep slope of the coast. On the beach with the foreshore being extremely narrowed the extension of wave dissipating structures placed along the shoreline is planned to reduce wave run-up. In this study, beach changes in this area are investigated using bathymetric survey data and the grain size analysis of seabed material. Then, the optimum arrangement of wave dissipating facilities was studied using the contour-line-change model.
