基于高分辨率影像的海岛岸线和开发活动变化监测

Monitoring of Human Activities and Coastlines Change Based on High Resolution Remote Sensing Images

海岛监测是海岛资源开发利用与环境保护的前提和基本依据。本文以资源三号和高分二号两景高分辨率遥感影像分析近5年来铜盘岛海洋特别保护区内7个海岛的开发活动和岸线变化特征,结果表明:保护区内多为无居民海岛,开发活动主要集中在铜盘山,其中变化较大的是仓储用地和采石场,表现为近5年来面积有所减少。海岛岸线主要有基岩岸线、砂质岸线、淤泥质岸线和人工岸线四类,从岸线总体变化、不同岸线类型变化及变迁速率三个方面进行分析,其中基岩岸线变化较小,砂质岸线变化最大,表现为侵蚀,淤泥质及人工岸线长度有所增加。

The results of island monitoring support the fundamental and reference for resources development and environment protection of island.In this paper,2 high resolution remote sensing images ZY-3 and GF-2 were collected to analyze change of human activities and shorelines in the Tongpan Island special marine protected area.The research results show that the majority of islands are uninhabited in protected area,and most human activities in Tongpan Mountain,the land for storage and mining changed obvious,and areas was decreased during the past five years.Coastlines mainly classed into rocky,sandy,muddy and artificial four types.Coastline change was analyzed through the change of whole shorelines,different shoreline kinds and change rate three dimensions.The results show that the rocky coastline less changed,the sandy coastline was eroded rapidly,and the length of muddy and artificial coastline was increased.