| 长江河口南、北港河道挟沙能力研究 |
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| 引用本文： | 徐敏,李九发,李占海,姚弘毅,陈炜.长江河口南、北港河道挟沙能力研究[J].海洋学研究,2012,30(2):51-57. |
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| 作者姓名： | 徐敏 李九发 李占海 姚弘毅 陈炜 |
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| 作者单位： | 华东师范大学河口海岸学国家重点实验室,上海 200062 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 近年来,随着长江流域来沙量的减少,河口水沙动力条件以及河床地形必将发生一定程度的变化。通过对长江口南﹑北港河道连续9d小潮至大潮水沙定点观测发潮流速增强,大潮期含沙量较高,表明泥沙再悬浮明显。通过实测数据分别给出大、中小潮南、北港河道挟沙力经验公式,显示出潮流与含沙量具有良好的相关性,同时显示出潮流流速与挟沙能力的方次变化有良好的对应性。
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| 关 键 词： | 长江河口 南、北港河道 潮流流速 含沙量 挟沙力 水沙变化 |
| 收稿时间： | 2011-11-20 |
Sediment carrying capacities at the South and North Channels of the Changjiang River Estuary |
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| XU Min
,
LI Jiu-fa
,
LI Zhan-hai
,
YAO Hong-yi
,
CHEN Wei.Sediment carrying capacities at the South and North Channels of the Changjiang River Estuary[J].Journal of Marine Sciences,2012,30(2):51-57. |
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| Authors: | XU Min LI Jiu-fa LI Zhan-hai YAO Hong-yi CHEN Wei |
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| Institution: | State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062,China |
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| Abstract: | In recent years,the hydrodynamics and riverbed topography of the Changjiang River Estuary is inevitably experiencing some new changes due to the decrease of the runoff and sediment load.Successive 9- days fixed point observations during neap-mean-spring tide show that the sediment content was relatively low for neap tide,increased with the increase of flow velocity and was higher for spring tide,which indicated evident sediment resuspension.Analysis of the observed data gave out empirical formula of sediment carrying capacity of neap,mean and spring tides for the South and North Channels of the Changjiang River Estuary, and showed good correlation between the sediment content and tidal current,and also good correspondence of their power changes. |
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| Keywords: | Changjiang River Estuary South and North Channels flow velocity sediment content sediment carrying capacity variation of runoff and sediment discharge |
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