江苏中部淤泥质海岸岸线变化遥感监测研究

发布时间：2018-06-06 22:37

本文选题：淤泥质潮滩 + 遥感　；参考：《海洋学报》2017年05期

【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10m/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。
[Abstract]:Shoreline monitoring is the basis for understanding the changes of coastal erosion and siltation. In view of the characteristics of gentle slope in intertidal zone of muddy coast, considering the influence of tide on remote sensing coastline monitoring, the method of water edge line is improved based on multi-tidal station interpolation correction of water edge line discrete point tidal level assignment and slope calculation. Combined with the correction of the measured slope data in the intertidal zone, the remote sensing coastline was calculated. The remote sensing monitoring of shoreline changes is carried out in the section from the Tam River Estuary to the East Port of Sichuan Province, which has frequent erosion and siltation changes in the middle of Jiangsu Province and has a high retention rate of natural shoreline. The results show that the slope of the study area is mainly between 0.001 and 0.002, and the width of the intertidal zone is wider and wider from north to south. The northern part of the Tam River estuary to Sheyang River port is in a scour environment, and a large number of artificial shoreline, which is dominated by ponds, is continuously eroded and retreated. The dynamic change of coastline from Sheyang Estuary to Simaoyou River Port is the main one. The average rate of erosion and siltation in 2010-2015 is less than 10 m / a, and the range of change is relatively small, and the natural shoreline siltation is obvious in the southern Simaoyou estuary to the east coast of Sichuan. At the same time, artificial reclamation led to shoreline moving toward the sea. According to the monitoring results, it is considered that the section between Xinyang Port and Doulong Port should be a transitional zone from northern erosion to southern siltation.
【作者单位】：南京师范大学地理科学学院;江苏省地理信息资源开发与利用协同创新中心;
【基金】：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)
【分类号】：P737.1;P715.7

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