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1994 年11 月 24—25 日 (枯季)， 在长江口南部水域内， 对 2 个定点、2 个段面 ( 24 个站位) 进行了水流流速、盐度及悬沙浓度观测。而后，分别绘制出：( 1 ) 水流流速、盐度和悬沙浓度沿水深、时间变化过程图；( 2 ) 各层水流流速、流向随时间变化过程图。 结果分析表明： 1 ) 实测水流流速、盐度及悬沙浓度垂向、水平分布具不连续性，表明了次级羽状锋的存在； 2 ) 在枯季，相对于径流、波浪而言， 外海潮流对长江口次级羽状锋的影响占主导作用； 3 ) 次级羽状锋可能使得悬沙在南汇东滩附近大量淤积；4)次级羽状锋在长江口与杭洲湾之间的水沙交换中起着一定作用。
From November 24 to 25, 1994 (dry season), the water flow velocity, salinity and suspended sediment concentration were observed in two fixed points and two sections (24 stations) in the southern Yangtze River estuary. Then, we plotted: (1) flow velocity, salinity and suspended sediment concentration along the water depth and time variation; (2) Flow velocity and flow direction of each layer change with time. The results show that: 1) The vertical and horizontal distribution of measured flow velocity, salinity and suspended sediment concentration are discontinuous, indicating the existence of secondary feather front; 2) In the dry season, relative to runoff and wave, 3) the secondary feather front may cause a large deposition of suspended sediment in the vicinity of Nanhui East Beach; 4) the secondary feather front in the Yangtze Estuary and Hangzhou Bay Between the water and sediment exchange play a role.