长江口河口段重大工程的建设对水动力的影响(黄静; 顾杰; 韩冰)

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1ap? T D0长江河口段重大工程建设对水动力的影响

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【作者】黄静; 顾杰; 韩冰 【作者单位】上海海洋大学海洋学院

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【论文摘要】 本研究运用 Delft 3D-FLOW 建立了长江口二维潮流数学模型,并利用实测流速和潮位过程对模型进行了率定和验证,建立的模型较好地反应了长江口河口段的水动力特性. 对长江口重大工程建设前后计算结果表明,福姜沙整治工程的建设有效地阻止了越滩流,使福北水基本沿福北水道走,而且提高了福南水道的落潮分流比.对青草沙水库,大潮时,北支的下泄量有较大幅度地增加,使会潮点向北支下游推移,减少了北支向南支倒灌的盐水. 深水航道建设后,由于航道水深加大,北槽流量增大了许多,但流速增加有限,航道内会随着来沙量的增加而增加淤积量。

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【英文论文摘要】 A two-dimensional numerical model is set up to simulate the hydrodynamics of the Changjiang Estuary with Delft3D-FLOW in this research.This model has been calibrated and validated with the observed data,which shows it can simulate the hydrodynamics of the Changjiang Estuary well.The comparison of the flow fields before and after the key projects indicates that after Fujiangsha regulation project,the current will not pass over the shoal and go straight along the North Channel of Fujiangsha,which leads the increase of the diversion ratio in the South Channel of Fujiangsha.The discharge flow of the North Branch increases a lot during the spring tide after Qingcaosha Reservoir constructed,so that the saline water intrusion from the North Branch to the South Branch becomes weak,and the water inlets in the South Branch can be protected.With the deep-water-channel regulation project,the flow rate of the North Passage increases a lot but the velocity increases a little,which causes the sedimen...更多t deposition increase due to the increase of the amount of sediment carried by the flow.  还原水利论文)F HTO0Xc

&N ]"sCvv*H0【论文关键词】 长江口; 数值模拟; 重大工程; 冲淤水利论文D5uY^2V
【英文论文关键词】 The Changjiang Estuary; Numerical simulation; Key projects; Erosion and deposition
)N2d)E`4u:?0【基金】上海市教委重点学科 J50702.
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TAG: 长江 河口 顾杰 韩冰 黄静
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