中文摘要：

根据长江口深水航道治理工程二期2005年8月大潮期间的水文测验资料,选取NG0、NG3、CB1、CS0、CS1、CB2、CS2、CS6、CSW、CS3、CS7、CS4、CS5共13个站位测点的二个潮周期的六层流速测量资料,对这些测点数据进行准潮流调和分析,得出P1,K1,M2,M3,M4,2MK5,M6,3MK7,M8,M10共10个分潮的潮流调和常数及余流结果,并计算给出了相应椭圆要素。研究分析发现,潮流特征系数值均不超过0.25,沿程各测点区域潮流类型以半日潮为主。对太阴半日分潮M_2的椭圆长半轴、椭圆短半轴、椭率以及格林威治迟角等椭圆要素空间分布特征进行分析比较。总结潮流椭圆要素、潮流特征、浅水影响分子、余流以及最大可能潮流流速的沿程空间变化规律以及动力影响分析。M2分潮的椭圆要素有较强的规律性,浅水影响因子随水深变小而增大,在总体上都有沿程减小的趋势。最大可能潮流流速在垂向从表层到近底层逐渐减小,符合水流流速沿水深的分布。研究结果对理解深水航道动力状况、淤积机制和指导航道工程整治具有一定价值。

英文摘要：

Tidal current data of two periods at 13 tidal current surveying sites in the deep water channel of Yangtze Estuary are analyzed respectively using tidal current harmonious program. The date of the NG0,NG3,CB1,CS0,CS1,CB2,CS2,CS6,CSW,CS3,CS7,CS4,CS5 sites are divided into six layers. Tidal harmonious constants of 11 constituents are analyzed out. Tidal current character and tidal current elliptic factors of each site are calculated and analyzed. The research shows that the tide characteristic coefficient values are less than 0. 25. The semidiurnal tidal current play major role in the measuring point area. M2 constituent is primary and the characters of tidal current are normal semidiurnal tidal rectilinear current in the sea area. The tidal current elliptic factors of the M2 constituents of six water layers at each tidal current surveying site are analyzed. The primary direction of tidal current is along deep water channel. Spatial characteristic of current vector turn are complex. The current vector turn of upper water layer mainly shows clockwise. In lower water layer,seabed and landform factors affect the current vector turn greatly. The Greenwich phase lags of the six water layers at observation stations are studied. Summarizes the trend of elliptic elements,characteristics,trends,residual current in shallow water factor,and the possible trend of flow velocity along the space change rule and the analysis of the dynamic impact. The M2 constituent of elliptic elements have stronger regularity,which has decrease trend along the spatial. The influence of shallow water factor to tidal current is prominent in shallow water area and the values increase from upper water layer to lower water layer. The results of the study is beneficial to understand the Yangtze Estuary deepwater channel dynamic condition,deposition mechanism and to guide the channel engineering regulation.