黄河口海岸线时空变迁遥感监测

摘要黄河作为世界上含沙量最大的河流，在经过入海口时，会携带大量的泥沙淤积在渤海凹陷处，并向海内扩展，而在海洋动力，海平面上升等外力的影响下，淤积处又会被海水侵蚀，淤积与侵蚀现象反复发生。及时准确的监测黄河口海岸线的动态变化信息和研究特征演变管理，对于岸线管理、区域资源规划和保护具有重要的研究意义。本文以2003-2015年间的黄河口地区卫星遥感影像为基本数据源，首先对ETM+遥感影像进行去条带处理，再进行辐射定标，几何校正，统一投影和坐标系；接着使用阈值分割法对海岸线精确提取；最后使用GIS对海岸线进行变化分析，发掘2003-2015年间黄河口海岸线的变化特征，并结合其他数据资料，探讨其动态变化原因。结果表明:2003-2015年间，黄河口东北部港口地区较稳定，北部与南部都有被侵蚀的现象。黄河口地区海岸线演化的总体趋势为由原来的海岸淤积增长型向海岸侵蚀方向发展。黄河口海岸带面积总体呈下降趋势。特别是2006年-2009年间，面积减小趋势明显，过程较为不稳定。黄河来水来沙、海洋动力和岸坡岩土体工程地质特性是导致这个现象的主要原因。 72871

毕业论文关键词：黄河口，海岸线，遥感，动态监测

Abstract The Yellow River sediment concentration is one of the most in the world。When it passes through the estuary。 It will carry a lot of silt accumulation in the Bohai depression。After deposition to form a flood plains 。the ocean dynamic and sea level rise will cause erosion to the land，Finally to speed up the the changes of the coastline。timely and accurately Monitoring the dynamic changes of the Yellow River coast and researching changes on the characteristics have important research significance in coastline management and regional resources planning and protection。The article based on the satellite remote sensing image as the basic data source river estuary area。To deal with the band of ETM + remote sensing image, and then to calibrate the radiation，geometric correction, projection and coordinate system。Using the threshold segmentation method to accurateextraction on the coastline。Finally GIS analysis was carried out on the coastline changes。It is concluded that the change of river estuary coast between 2003 and 2015。At last combining with data study of the causes of its dynamic changes。The results showed that from 2003 to 2015, North-East river estuary port area is stable, the phenomenon of north and south have eroded。The overall trend of the Yellow River region coastline evolution is that Coastal alluvial turn into coastal erosion。O sea shore with river estuary area is on the decline as a whole。Due to the increase of artificial control power after 2002, coming water and sediment volume increased slightly, but the overall trend is still a river estuary sedimentation velocity slows or eroded。Especially in 2006-2009, the area is decreasing trend obviously, process is more unstable。 The Yellow River water and sediment, Marine power and the bank slope rock mass engineering geological characteristics is a major

cause of lead to this phenomenon。

Key words: coastline, Yellow River Estuary, remote sensing, dynamic monitoring

摘要 II

Abstract III

1 绪论 1

1。1 引言 1

1。2 国内外研究进展 1

1。3 本文研究内容 2

2 研究区域概况 3

2。1 研究区介绍 3

2。2 黄河口海岸线的近期演变进程黄河口海岸线时空变迁遥感监测:http://www.youerw.com/guanli/lunwen_82976.html