Interaction of Two Circular Sandy Islands on Flat Shallow Seabed due to Waves

Abstract

On a flat shallow seabed, sand spits and cuspate forelands with rhythmic shapes may develop and a barrier island can elongate alongshore which significantly differs from the beach changes on coasts facing a deep ocean. In this study, the interaction between two circular islands on a flat shallow seabed due to waves was investigated by the numerical simulations, focusing on the wave-sheltering effect of the islands themselves. The topographic changes caused by the interaction between two sandy islands were predicted using the BG model.