BEACH EROSION AND DEPOSITION UNDER STORM AND DEFENSE MEASURES

Around the Xiangyun island, waves in northeast,northwest and southwest directions play key roles in beach evolution as seen along the monitoring profiles from A1 to A9 and the profiles from B1 to B5. The ratio of waves from the three directions is 1.58%, 0.98% and 0.45% respectively, and they are related to the erosion and deposition of beach. In terms of the types of beach nourishment, the Xiangyun island belongs to a straight sand coast of an in-phase beach. As such a beach has a strong response to wave action, some "hard projcets" are indispensable.