江苏中部淤泥质海岸岸线变化遥感监测研究

陈玮彤; 张东; 施顺杰; 周静; 康敏

doi:10.3969/j.issn.0253-4193.2017.05.013

江苏中部淤泥质海岸岸线变化遥感监测研究

doi: 10.3969/j.issn.0253-4193.2017.05.013

1.
南京师范大学地理科学学院, 江苏南京 210023
2.
南京师范大学地理科学学院, 江苏南京 210023;江苏省地理信息资源开发与利用协同创新中心, 江苏南京 210023

基金项目: 国家自然科学基金项目（41401371）；江苏省测绘地理信息科研项目（JSCHKY201504）；江苏高校优势学科建设工程资助项目（164320H116）。

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出版历程
- 收稿日期: 2016-07-28
- 修回日期: 2016-12-06

Research on monitoring coastline changes by remote sensing in muddy coast, central Jiangsu coast

1.
Department of Geography, Nanjing Normal University, Nanjing 210023, China
2.
Department of Geography, Nanjing Normal University, Nanjing 210023, China;Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China

摘要

摘要: 海岸线监测是了解海岸冲淤变化的基础。针对淤泥质海岸潮间带坡度平缓的特点，考虑到潮汐对遥感海岸线监测的影响，基于多潮位站插值校正的水边线离散点潮位赋值及坡度计算对水边线方法进行了改进，并结合潮间带实测坡度资料校正，推算遥感海岸线。选择江苏中部冲淤变化频繁、自然岸线保有率较高的扁担河口至川东港岸段开展海岸线变迁遥感监测研究。结果表明，研究区坡度主要在0.001~0.002之间，潮间带宽度由北向南越来越宽。北部扁担河口至射阳河口岸段处于冲刷环境中，大量以养殖塘围堤为主的人工岸线不断被侵蚀后退；射阳河口至四卯酉河口岸段以海岸线在自然状态下的动态变化为主，2010-2015年平均冲淤速率小于10 m/a，变化幅度较小；南部四卯酉河口至川东港岸段，自然岸线淤长明显，同时人工围垦导致岸线不断向海推进。根据监测结果，认为新洋港至斗龙港岸段应为研究区由北部侵蚀转向南部淤长的过渡带。
- 淤泥质潮滩 /
- 遥感 /
- 潮汐 /
- 潮滩坡度 /
- 潮滩冲淤 /
- 海岸线
Abstract: Monitoring coastline changes is the basis of understanding the change of coastal erosion and deposition. Considering the gentle slope of muddy tidal flat and the influence of tide, this paper improves the ‘Water-Line’ method by valuing discrete points of waterlines based on multiple tide monitoring stations and calculating average slope of tidal flat. The results were tested by measured slope of tidal flat. The study chose Biandan River Estuary to Chuandong Harbor coast, frequent change of erosion and deposition and high retention rate of the natural shoreline, to monitoring remote sensing coastline changes. Results showed that, slope of study area is between 0.001 to 0.002 and the intertidal zone is becoming wider from north to south. Biandan River Estuary to Sheyang River Estuary coast is in the eroding environment. A mass of artificial shoreline mainly composed of pond cofferdams are continuously eroded backwards to the sea; Sheyang River Estuary to Simaoyou River Estuary coast is mainly in the change under natural state. The average eroding rate of this area is less than 10 m/a, which is little; Simaoyou River Estuary to Chuandong Harbor coast is in the depositional environment. And the artificial shoreline in this area continuously advances to the sea because of reclamations. According to the results, this paper argues that Xinyang Harbor to Doulong Harbor coast should be the transition zone of study area from northern erosion to southern deposition.
- muddy tidal flat /
- remote sensing /
- tide /
- slope of tidal flat /
- erosion and deposition /
- coastline

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