节点文献
长江口南部水域次级羽状锋
On Secondary Plume in the Southern Waters of the Changjiang River Estuary
【摘要】 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。
【Abstract】 :Tidal current velocity, salinity and suspended sediment concentration have been measured at two monitoring stations and along two transects (1994-11-24~-25) in the southern waters of the Changjiang River estuary. Two types of plots have been obtained: (1) time series of current velocity, salinity and suspended sediment concentration (contour lines); (2) time series of current speed and direction measured at six different depths. Those data suggest that 1) the secondary Changjiang River plume is present; 2) the tidal current appears to be a dominant mechanism for the secondary Changjiang River plume during dry season; 3) the secondary Changjiang River plume could result in the deposition of fine suspended sediments on the Nanhui tidal flat; and 4) the secondary Changjiang River plume also plays an important role in the water and sediment exchange between the Changjiang River estuary and the Hangzhou Bay.
【Key words】 :secondary plume; velocity; salinity; suspended sediment concentration; Changjiang River estuary;
- 【文献出处】 海洋通报 ,Marine Science Bulleten , 编辑部邮箱 ,2002年06期
- 【分类号】P731.2
- 【被引频次】8
- 【下载频次】195