Abstract
On the Shimizu coast, L-shaped groins have been planned to control longshore sand transport without damaging the scenery of Mt. Fuji from the shoreline. Also, detached breakwaters have been constructed to prevent beach from eroding. When storm waves hit the coast, large beach changes would occur, and these beach changes are important in considering the plan of L-shaped groins. Therefore, beach changes triggered by storm waves during Typhoon Nos. 16 and 27 in 2013 were investigated on the Shimizu coast. It was found that the wave dissipating effect of the detached breakwaters was reduced during storm waves, and cuspate forelands formed behind the structures were eroded.
