Abstract
Three typhoons hit the Tojo-Maebara coast during summer in 2015, resulting in severe erosion. To investigate the cause of the beach erosion, field investigation regarding longitudinal profiles using a RTK and grain size distribution along the shoreline were carried out. The shoreline changes were also analyzed using aerial photographs. It is found that the erosion of the coast, which was triggered owing to the wave-sheltering effect of the fishing port breakwater constructed at the south end of the pocket beach, still continues at present and the water depth in front of the shoreline increases, causing damage of the gentry sloping revetment on this coast.
