Abstract
Beach changes associated with the interaction and mergence of sand bars located at the end of multiple sandy islands were investigated, taking two islands facing the Yellow Sea in Korea and Kara Sea in Russia. When multiple islands are located alternately, the sand bar at the end of one island deforms, while subjecting to the wave-sheltering effect from the other island. In this study, the BG model was used to predict beach changes, when waves are incident randomly in both downward and upward directions to the multiple islands, assuming the initial shape of the sand supply area as an obelisk.
