基于多源数据的福建东山岛海岸侵蚀及其不同时空尺度成因分析

发布时间：2018-05-11 09:26

本文选题：海岸侵蚀 + 东山岛　；参考：《海洋学报》2016年03期

【摘要】：海岸侵蚀对海岛紧缺的陆地资源及旅游价值较大的沙滩危害巨大。基于卫星遥感、有人航空摄影、无人机航测、GPS和现场调查等多源数据,利用GIS分析了东山岛海岸线类型、位置与长度变化及滩面冲蚀演变。研究表明,东山岛多处曲折自然岸线转化为较为平直的人工岸线致使整体岸线长度减少,无人机高程反演满足滩面排水冲蚀监测精度要求,乌礁湾和山南湾不同养殖排水方式形成不同特征的滩面冲沟,改变了沙滩微地貌形态。海平面上升和台风风暴潮是长期趋势性和短期突发性侵蚀因素的代表,当前短时间尺度的人类活动已成为滩面冲蚀的最主要因素,且有可能转变为长期趋势性因素。
[Abstract]:Coastal erosion does great harm to the land resources and the sandy beaches which are of great tourism value. Based on satellite remote sensing, aerial photography, UAV aerial survey and field survey, the type, location and length of Dongshan Island shoreline and the erosion evolution of beach surface were analyzed by GIS. The study shows that many tortuous natural shorelines in Dongshan Island are converted into more straight artificial shoreline, which reduces the length of the whole shoreline, and the UAV elevation inversion can meet the monitoring accuracy requirements of beach surface drainage erosion monitoring. Different aquiculture and drainage methods in Wujiao Bay and Shannan Bay formed different beach surface gullies, which changed the beach microgeomorphology. Sea level rise and typhoon storm surge are the representative of long-term trend and short-term sudden erosion. Human activities in short time scale have become the main factor of beach erosion and may be changed into long-term trend factors.
【作者单位】：国家海洋局第一海洋研究所海岛海岸带研究中心;国家海洋局第三海洋研究所;国家海洋局第一海洋研究所海洋工程与测绘研究中心;国家海洋局第一海洋研究所海洋沉积与环境地质国家海洋局重点实验室;
【基金】：中央级公益性科研院所基本科研业务费专项资金项目(GY0214G17) 国家海洋公益性行业科研专项(201005010) 青岛博士后人员项目启动资金(QDBSH2014006)
【分类号】：P737.17

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