| 长江口九段沙下段冲淤演变水动力机制分析 |
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| 引用本文： | 徐福敏,严以新,茅丽华. 长江口九段沙下段冲淤演变水动力机制分析[J]. 水科学进展, 2002, 13(2): 166-171 |
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| 作者姓名： | 徐福敏 严以新 茅丽华 |
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| 作者单位： | 河海大学海岸与海洋工程研究所, 江苏, 南京, 210098 |
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| 摘 要： | 概述了长江口深水航道整治一期工程及工程对九段沙下段地形冲淤的影响.根据已建立的σ坐标系下三维非线性水流数学模型,用新测水文资料对模型进行验证.利用所建立的模型,结合由现场测量得到一期工程前后九段沙下段近期地形演变,数值模拟了北槽区域流通量、底层欧拉余流和北槽中下段平面水流特征,以综合分析北槽水域水动力变化对九段沙下段地形冲淤变化的影响.
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| 关 键 词： | 九段沙 长江口 三维非线性水流数学模型 流通量 欧拉余流 |
| 文章编号： | 1001-6791(2002)02-0166-06 |
| 收稿时间： | 2001-01-15 |
| 修稿时间： | 2001-01-15 |
Analysis of hydrodynamic mechanics on the change of the lower-section of the Jiuduan Sandbank in the Yangtze River estuary |
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| XU Fu-min,YAN Yi-xin,MAO Li-hua. Analysis of hydrodynamic mechanics on the change of the lower-section of the Jiuduan Sandbank in the Yangtze River estuary[J]. Advances in Water Science, 2002, 13(2): 166-171 |
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| Authors: | XU Fu-min YAN Yi-xin MAO Li-hua |
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| Affiliation: | Research Institute of Coastal & Ocean Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | The stageⅠregulation work of deep water channel of the Yangtze River estuary and the topographic change of the lower-section of the Jiuduan Sandbank(JS)after regulation are simply described. The non-linear three2dimensional numerical model under the σcoordinate system is applied,which is verified by the field observations. According to the measured topographic change of the lower-section of the JS after and before the stageⅠregulation work(from May 1997 to March 2000),the tidal flow discharge,the Euler's residual flow and the current velocity characteristics in the middle and lower sections of the North Channel are simulated by using the model in order to interpret the hydrodynamic mechanics of sediment movement and topographic change. |
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| Keywords: | Jiuduan Sandbank the Yangtze River estuary non-linear three-dimensional model tidal flow discharge Euler’s residual flow |
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