淤泥质潮滩冲淤时空分异的遥感研究- - 以苏北辐射沙脊群为例

项目名称： 淤泥质潮滩冲淤时空分异的遥感研究- - 以苏北辐射沙脊群为例

项目编号： No.41206092

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 海洋科学

项目作者： 何华春

作者单位： 南京大学

项目金额： 27万元

中文摘要： 潮滩作为海洋与陆地交接的重要沉积地带，是海陆相互作用最活跃的区域。近来啦，受泥沙供应、水动力、人类活动等因素的影响，潮滩存在不同时间尺度的侵蚀和淤积现象，沿岸生态环境及工程设施受到不同程度的威胁。掌握潮滩地形信息及冲淤演变情况对合理开发潮滩资源非常有益。淤泥质潮滩高程测量是地形测量的困难区域，现势性强、大范围的潮滩高程信息稀缺。本研究拟以我国典型淤泥质潮滩-苏北辐射沙脊群为研究区，探讨以短时距、多时相多源遥感影像为数据源，结合地面实测光谱特征，综合运用动力沉积和动力地貌、GIS技术和DEM模型、现场观测资料与数值模拟、定性和定量相结合的方法，在水边线技术及水动力模型的支持下，构建30年来苏北淤泥质潮滩历史高程模型，计算研究区不同部位的多年平均沉积速率，分析潮滩冲淤的空间差异及影响因素，为淤泥质潮滩的可持续利用提供科学依据，为海岸带土地利用、海岸工程建设等提供基础数据与决策支持。

中文关键词： 遥感；淤泥质潮滩；水边线；数字高程模型；辐射沙脊群

英文摘要： As an important deposition and sensitive belt of sea and land interaction, the environment of tidal flat is easily affected by human activities and hydrodynamic conditions. In recent years tidal flat suffered erosion and deposition on different time scales affected by the sediment supply, hydrodynamic, human activities and other factors, which threated coastal ecosystems of environmental and engineering facilities differently. To grasp terrain , erosion and deposition of the tidal flat is very useful for the rational development of tidal flat resources. Silt tidal flat is characterized as muddy surface, densely covered and frequently varied tidal creeks.Therefore,the traditional field observation has been restricted by the difficulty of access. Elevation measurement of muddy tidal flat is difficult in the topographic survey area so the tidal flat elevation information of real-time and large-scale is scarcity. Remote sensing ,combined with in situ surveying, is an effective tool for monitoring the tidal flats which can be detected by visible and near infrared sensors. In this study, radial sand ridges of the South Yellow Sea, as the typical muddy tidal flat, is selected to explore using short-term, multi-temporal and multi-source remote sensing image as the data source, combined with ground spectral features, an

英文关键词： Remote sensing；Silt tidal flat；Waterline；Digital Elevation Model；Radial sand ridge group