中文摘要：

以长江口北槽河道为例，以大量实测资料为基础，分析潮汐河口宽浅弯道的水流动力特性及演变特征，探讨北槽航道回淤集中于弯道段与潮汐河口宽浅弯道演变的关联性。研究成果表明，尽管受多种因素干扰以及河槽较强的二维性，潮汐河口弯道仍呈现了一定程度弯道水流特征和演变特征，北槽中部航槽的弯道形态可能对航道回淤起到一定的促进作用。

英文摘要：

Taking the north passage of the Yangtze River estuary for example and based on a large number of field measured data, we analyze the flow dynamics characteristics and evolution characteristics on the wide-shallow tidal estuary meandering river and explore the relationship between the fact of silting concentration in the bend section of the north channel and the evolution of wide-shallow tidal estuary meandering river. The result shows that despite the disturbance of multiple factors and the strong two-dimensional characteristics of the channel, the tidal estuary meandering river still presents bend flow characteristics and characteristics of evolution to a certain degree. The bend on the middle north channel may promote silting concentration.