| Suruga Coast, which stretches from Oigawa Port to Yaizu in Shizuoka Prefecture, is known as one of the most eroded coastlines in Japan. As a measure against erosion, legtype offshore breakwaters were installed for the first time in Japan, in addition to conventional offshore breakwaters of deformed concrete blocks. This project, which consists of breakwaters and sand bypassing using sand collected from the beach west of Oigawa Port, has been continuously implemented. Investigation of the long-term effects of this composite shore protection measure has confirmed that long-term stability of the beach has been achieved through a combination of leg-type offshore breakwaters and sand bypassing and that this measure has brought about a change in the stability of the beach. In addition, the investigation has also provided an important insight into this measure as a comprehensive sand management system for future management of the coast. |
