| 长江口南支分流分沙比观测与分析 |
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| 引用本文： | 万正松,闵凤阳,张志林,刘桂平,浦泽良,黎礼刚.长江口南支分流分沙比观测与分析[J].南京大学学报(自然科学版),2009,45(3). |
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| 作者姓名： | 万正松 闵凤阳 张志林 刘桂平 浦泽良 黎礼刚 |
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| 作者单位： | [1]长江水利委员会长江口水文水资源勘测局,上海200136 [2]南京大学地理与海洋科学学院,南京210093 [3]长江科学院河流研究所,武汉430010 |
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| 基金项目： | 江苏省“六大人才高峰”项目(2006027);;江苏省自然科学基金(BK2006131);;国家重点基础发展规划项目(2002CB412401) |
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| 摘 要： | 2007年2月在长江口南支进行沉积动力学参数的全潮观测，以获取枯季期间南北槽、南北港的分流分沙特征．结果表明，多数站位涨潮流速大于落潮流速，涨潮历时小于落潮历时，涨潮悬沙浓度大于落潮悬沙浓度，这种涨落潮不对称效应主要与径流作用和潮波变形有关．悬沙浓度与流速也有一定的相关关系，表明再悬浮作用较为显著．从净泄水量看，北港大于南港，南槽大于北槽，形成由陆向海输运的格局．输沙量则为由海向陆，尤以南槽和南港为最大，加之河流上游亦有来沙，最终在南支拦门沙附近海域形成较为显著的淤积状态．
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| 关 键 词： | 流速 悬沙浓度 沉积动力学 长江河口 |
Observations and analyses of the water and sediment discharge ratios in the southern branch,Changjiang Estuary |
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| Wan Zheng-Song,Min Feng-Yang,Zhang Zhi-Lin,Liu Gui-Ping,Pu Ze-Liang,Li Li-Gang.Observations and analyses of the water and sediment discharge ratios in the southern branch,Changjiang Estuary[J].Journal of Nanjing University: Nat Sci Ed,2009,45(3). |
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| Authors: | Wan Zheng-Song Min Feng-Yang Zhang Zhi-Lin Liu Gui-Ping Pu Ze-Liang Li Li-Gang |
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| Institution: | 1.Changjiang River Estuary Inversity Bureau of Hydrology and Water Resource;Changjiang Water Resource Commission;Ministry of Water Resources;Shanghai;200136;China;2.School of Geographic and Oceanographic Sciences;Nanjing University;Nanjing;210093;3.Changjiang River Scientific Research Institute;Wuhan;430010;China |
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| Abstract: | The water and sediment discharge were measured in the southern branch of Changjiang Estuary in February,2007 during a spring tidal cycle.Because of the influence of the runoff and distorted tidal wave due to the local seabed topography,the current velocities and suspended sediment concentrations(SSC) during the flood were larger than those during the ebb.A significant relationship exises between the velocity and SSC which indicates that the resuspension is important at the study area.The overall water disch... |
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| Keywords: | current velocity suspended sediment concentration sediment dynamics Changjiang Estuary |
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