| 台风浪作用下长江口深水航道骤淤数值模拟 |
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| 引用本文： | 路川藤,贾晓,韩玉芳,白一冰.台风浪作用下长江口深水航道骤淤数值模拟[J].水科学进展,2018,29(5):696-705. |
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| 作者姓名： | 路川藤 贾晓 韩玉芳 白一冰 |
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| 作者单位： | 1.南京水利科学研究院水文水资源与水利工程科学国家重点实验室, 江苏 南京 210024; |
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| 基金项目： | 国家重点研发计划资助项目（2017YFC0405400）；国家自然科学基金资助项目（51509161） |
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| 摘 要： | 极端天气条件下，波浪引起的高含沙水体会引起航道骤淤，增大航道回淤量。以"马勒卡"台风期间现场水文资料为基础，建立了波流共同作用下的长江口三维潮流泥沙数学模型，研究北槽航道骤淤问题。数学模型验证了"马勒卡"台风期间的北槽水沙过程，相似性较好，通过分离波浪，探讨了潮流与波流共同作用下的含沙量及航道淤积分布差异，研究了台风浪对航道骤淤的影响。研究表明，台风浪对-15 m等深线以浅水域含沙量影响较大，北槽含沙量自上游至口外逐渐增大，改变了常态天气北槽"中间高、两头低"的含沙量分布趋势。台风浪对北槽口内航道回淤分布影响较小，北槽口外航道淤积量剧增，即航道骤淤主要发生在北槽口外。
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| 关 键 词： | 台风浪 深水航道 骤淤 长江口 CJK3D |
| 收稿时间： | 2017-12-26 |
Numerical simulation of sudden silting in the Yangtze Estuary deepwater channel by the wave of typhoon |
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| LU Chuanteng,JIA Xiao,HAN Yufang,BAI Yibing.Numerical simulation of sudden silting in the Yangtze Estuary deepwater channel by the wave of typhoon[J].Advances in Water Science,2018,29(5):696-705. |
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| Authors: | LU Chuanteng JIA Xiao HAN Yufang BAI Yibing |
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| Affiliation: | 1.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210024, China;2.Shanghai Estuary and Coastal Science Research Center, Shanghai 201201, China |
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| Abstract: | Under the extreme weather condition, the sediment-water mixture with high concentration that is caused by the wave would give rise to the sudden silting of the channel, and then increases the channel silting volume. Based on the field hydrological data during typhoon Malka, it establishes the three-dimensional tidal current and sediment mathematical model of the Yangtze River Estuary under the wave-current interaction, which is used to study the problem of sudden silting in North Channel. The mathematical model verifies the process of North Channel's water sediment during typhoon Malka, and the result shows that its similarity is better. By separating the wave, the writer discusses the different of sediment concentration and channel siltation under the combined action of both tide and wave flow and studies the influence of the typhoon wave on the silt of channel. The studied results show that the wave of typhoon has a great influence on the sediment concentration with the depth of -15 m in shallow water area. Meanwhile, the sediment concentration of North Channel increases gradually from the upstream to the outside and as a result it changes the distribution trend of sediment concentration as High in the middle and low in both ends of North Channel under the normal weather. The wave of typhoon has less influence to the back silting distribution of inner waterway of North Channel entrance, and the sediment deposition increases dramatically at the outer waterway of North Channel entrance. That is to say that the sudden silting of channel mainly takes place outside the North Channel. |
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| Keywords: | wave of typhoon deepwater channel sudden silting Yangtze Estuary CJK3D |
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