太平洋岛屿珊瑚礁海岸的侵蚀标志

Erosion Indicators on the Coral Reef Coast of the Pacific Islands

珊瑚礁海岸发育不完全的海滩和平缓的礁坪都处于海岸作用最活跃的位置。礁坪上长有海草的砂层侵蚀后形成大小不等的凹坑;Callophyllum inophyllum和 Barringtonia asiatica这两种乔木可以指示海岸 后退的距离。以马绍尔群岛共和国马朱罗环礁为例,说明在野外详细地追踪调查海滩岩对于正确地恢复海岸变迁历史,确定侵蚀原因和治理方案有着重要意义。

The incomplete beach and reef flat is situated on the active zone of coastal process. The reef flat also suffers erosion while the beach is eroded. The sand bed with sea grass cover on the reef flat can be partly eroded, forming some depressions. The surviving large tree Callophyllum inophyllum and Barringtonia asiatica can indicate distances of the shoreline retreat. To trace beachrock in detail can get significant conclusions in history of shoreline change, causes of erosion and management, for example, in Majuro Atoll, Marshall Islands.