RECOVERY OF SANDY BEACH ON NORTHERN NAGAYAMA-NO-HAMA BEACH ON IRABU ISLAND BY BEACH NOURISHMENT

Abstract

 Sandy beach of south Nagayama-no-hama Beach on Irabu Island was severely eroded owing to the effect of the construction of Irabu Bridge. Beach restoration was carried out on this beach to recover sandy beach. After the completion of the nourishment on south Nagayama-no-hama Beach, beach nourishment was also planned on the north beach. Numerical simulation using the BG model (a three-dimensional model for predicting beach changes based on Bagnold's concept) was carried out to determine the appropriate method.