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2013-2014年长江河口崇明东滩实施生态治理工程,围垦面积达14.4km~2。基于地面三维激光扫描技术(TLS),对治理工程前后崇明东滩地貌进行跟踪观测。研究发现崇明东滩北、中、南三部分对治理工程响应具有显著差异,可以看到自北至南的逐步响应过程。崇明东滩北部潮沟体系均发生改变,光滩淤积强度为+19.5cm/a,+2m线向海推进速率为356m/a,该区域原有地形、地貌均被改变,并逐步向新的动态平衡调整;中部区域部分潮沟体系发生改变,光滩淤积强度达+59cm/a,+2m线向海推进速率为251m/a,该区域部分地形、地貌发生改变,正在逐步调整过程中;南部潮沟体系格局基本稳定,但仍在缓慢发展中,光滩冲刷强度为-3.6cm/a,+2m线向海推进速率为3.9m/a,该区域目前还未受到治理工程的显著影响,地貌演变仍处于动态平衡中。
2013-2014 Chongming Dongtan Yangtze River Estuary to implement ecological management projects, reclamation area of 14.4km ~ 2. Based on the terrestrial 3D laser scanning technology (TLS), the landscape of Chongming Dongtan was observed and observed before and after the treatment project. It is found that there is a significant difference between the three parts of Chongming Dongtan in the north, central and south of China in response to the governance project, and the gradual response process from north to south can be seen. The tidal channel system in the northern part of Chongming Dongtan changed. The light beach sedimentation intensity was + 19.5cm / a, and the rate of advancement of + 2m line to the sea was 356m / a. The original terrain and landform in this area were changed and gradually changed to new The part of the tidal flat system in the central part of the region changed. The light beach sediment intensity reached + 59cm / a and the line velocity of + 2m line was 251m / a. Some topographic and topographic changes in the region were being gradually adjusted. The pattern of southern tidal flats is basically stable, but it is still developing slowly. The intensity of light beach erosion is -3.6cm / a and that of + 2m line is 3.9m / a. The region has not been significantly affected by the treatment project , Landscape evolution is still in dynamic equilibrium.