漠阳江入海口东侧海岸侵蚀现状及成因分析

对漠阳江入海口东侧海岸的侵蚀情况进行了详细的野外调查,在2年的调查时间内对监测岸段的海岸线位置及海滩地形开展了5次重复测量。各次测量结果的对比表明,漠阳江入海口东侧海岸遭受了严重的侵蚀,岸线平均后退速率达15m.a 1;海滩地形剖面的动态变化则显示海岸侵蚀和淤积情况随季节而改变,在2008年台风"黑格比"登陆后,研究区岸线大幅后退,岸滩地形发生了深刻变化。通过对研究区海岸侵蚀特点的分析,认为砂质海岸的脆弱性和水动力作用是该区海岸侵蚀的基本条件,风暴潮是造成该区海岸严重侵蚀的重要因素;另外,人类活动也加剧了研究区的海岸侵蚀。

Current situation and causes of coastal erosion in eastern Moyang River Estuary

This paper deals with the coastal erosion problems around the eastern Moyang River Estuary.The changes of coastline and coastal landforms were studied by comparing old and new aerial photographs and topographic maps,as well as through repeated field observations and local measurements regarding erosion processes.From these studies,the coastline of eastern Moyang River Estuary subjects to serious coastal erosion at an average annual rate of 15 m.The dynamic change of the coastal landforms profiles shows that the erosion or deposition differs from season to season.After the landfall of Typhoon Hagupit,the coastline retreated dramatically and the topography was changed.Through the analysis of characters of costal erosion,it was concluded that the storm surge had serious implications for coastal erosion of this area,and that the condition of erosion or deposition responded to the change of seasons as well.