| 长江河口盐水入侵锋研究 |
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| 引用本文： | 茅志昌.长江河口盐水入侵锋研究[J].海洋与湖沼,1995,26(6):643-649. |
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| 作者姓名： | 茅志昌 |
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| 作者单位： | 华东师范大学河口海岸研究所!上海，200062 |
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| 基金项目： | 国家自然科学基金!9487005－01 |
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| 摘 要： | 根据１９５９－１９８８年部分年份长江口南港南槽、南港－北槽－北港和北支共２２个纵向测次资料，计算分析各入海通道向盐水入侵锋的伸退区域及其特征。利用密度佛氏数Ｆ＇ｘ的计算结果，提出确定盐度锋迁移范围和滞流点的判据。研究结果表明，盐度锋对河口量大浑浊带主要有两大贡献：锋区含盐有利于泥沙絮凝；锋面附近形成的重力环流，有利于泥沙富集，形成最大浑浊带。
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| 关 键 词： | 盐度锋 滞流点 重力环流 盐水入侵 长江河口 |
| 收稿时间： | 4/8/1993 12:00:00 AM |
| 修稿时间： | 1994/10/19 0:00:00 |
A STUDY ON SALT FRONTS IN THE CHANGJIANG RIVER ESTUARY |
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| Mao Zhichang.A STUDY ON SALT FRONTS IN THE CHANGJIANG RIVER ESTUARY[J].Oceanologia Et Limnologia Sinica,1995,26(6):643-649. |
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| Authors: | Mao Zhichang |
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| Institution: | Institute of Estuarine and Coastal Research, East China Normal University, Shanghai 200062 |
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| Abstract: | Based upon the observed data of partial years from 1959 to 1988, using 22times of longitudinal hydrological field data of the South and North Channels, theSouth and North Passages, North Branch in the Changjiang River Estuary, calcula-tions and analyses have given locations and features of the saIt fronts in the 4 wa-terways.Based on calculations of the densimetric Froude number, the zone of up-down-stream for the fronts and location of null point are determined in the channels ofChangjiang River Estuary.It is indicated that the front plays two roles in the process of the turbuditymaximum. Salinity of the front zone is benificial to flocculation. The gravitationalcirculation in the front zone leads to convergence of sediments from up-downstream. |
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| Keywords: | Salt fronts Null point Mixing of salt-freshwater Gravitational circulation Densimetric Froude number |
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