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中文摘要：
在前人对河口冲刷槽研究的基础上，选择长江口南支、新桥水道、南小泓和南港主槽作为典型涨、落潮槽研究对象，以2001年洪季和2003年枯季实测资料为根据，比较分析了长江口涨落潮槽的水流、泥沙、优势流和优势沙等动力特征，结果表明用单一因子分析河槽性质不够全面．提出了一个（无量纲因子）河槽类型系数（A）来综合表述河槽的多种水文泥沙特征，可以较全面地用多个影响因子来合理地判断河槽类型．
英文摘要：
On the basis of previous study on deep channel, the South Branch,Xinqiao Channel, Nanxiaohong and Main Channel of Nangarg are chosen as the typical flood and ebb channels. Field data sampled in the flood season of 2001 and the dry season of 2003 are used as the base of the analysis of hydrodynamic characteristics, such as current, sediment, dominant current and dominant sediment. The result shows that it is not general to use single hydrodynamic characteristics to determine channel type. A non-dimensional parameter（λ）, which contains Rich information of muti-parameters, is been proposed to judge channel type reasonably.
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