以苏北岸外条子泥沙洲潮沟系统为例,分析该区域野外实地测量及历年卫片,分析主要潮沟系统近20年来的动态变化。总结了潮沟系统发育演变的特点,主要表现为各个主干潮沟系统摆动幅度、速率均不相同,单独潮沟系统的各沟段亦有不同的摆动幅度、速率;位于沙洲中部西大港西侧近岸潮沟系统摆动具一定周期性,其东侧潮沟摆动较稳定;潮沟摆动有突变和渐变两种形式。沙洲潮沟系统在多因素的综合作用下具备自动调整作用,主要表现为单一潮沟具有平衡倾向性及沙洲潮沟系统整体的综合布局调整。
Tidal creek system is one of the most particular geomorphology units in muddy flat and offshore sand shoals. This paper aims to study the tidal creek system of Tiaozini sand shoals in the north of Jiangsu coast. Through field surveying and a series of remote sensing images comparing, it details the main tidal creek system shift in recent years, such as Shishenggang, Neiwangjiachao, Xiaodengzhuanggang, Henggang, Xidagang, Dongdagang, Gaonigang. On this basis, it summarizes the development characteristics of the tidal creek system. First, every main tidal creek system has different shift distance and move rate and every part of one single tidal creek system also has different shift distance and move rate. Second, the tidal creek system in the west of Xidagang located on the center of Tiaozini sand shoals has shift period and the tidal creek system in the east of Xidagang is stable. Third, the shift style of tidal creek is sudden change and gradual change. Last, tidal creek system of sand shoal has autoconditioning action which behaves balance orientation of one single tidal creek and integrate adjusting of the whole tidal creek systems of sand shoals. This study on tidal creek system of Tiaozini sand shoals is available complementarity of the whole study of muddy flat and sand shoals tidal creek system. It also will provide scientific guidance for engineering construction, resource exploitation and so on.
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