| 摘要: |
| 为满足洋口港区发展需求，应对船舶大型化趋势，开展了烂沙洋北水道自然水深航道浚深的可行性研究。依据现场实测风速、潮流、波浪、泥沙等资料，进行了工程海域气象、水文、地貌等自然条件的综合分析，建立了辐射沙脊群洋口港区二维波浪潮流泥沙数学模型，对航道开挖方案实施后的潮流、泥沙进行了数值模拟，并预报了航道开挖后的常年回淤量和大风天的淤强分布。计算结果表明，航道开挖前后海区内潮流场变化不大，疏浚段流速略有变化；航道开挖后的常年回淤量小于700万m3，一次大风过程航道内不会发生骤淤碍航。因此，初步论证了烂沙洋北水道航道开挖是可行的。 |
| 关键词: 辐射沙洲 航道开挖 潮流 泥沙淤积 数值模拟 |
| DOI： |
| 分类号:U657.2 |
| 基金项目: |
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| Feasibility studies of waterway excavation in the northern Lanshayang tidal channel in Yangkou port area |
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QU Hong-ling, YOU Wei, MA Hong-liang
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Jiangsu Provincial Communications Planning and Design Institute Co.， Ltd.， Water Transport Engineering Research Center of Jiangsu Province
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| Abstract: |
| On the basis of field data about wind， tidal current， wave and sediment， the natural conditions including meteorological， hydrological， and geomorphological conditions of the coastal area near the Yangkou port in the radial sand ridges are analyzed. A 2-D wave-tidal current-sediment mathematical model is established and used to simulate the changes in tidal current and sediment after the waterway excavation and to predict the annual siltation volume and the silting-up distribution under the strong-wind weather conditions. The analysis results show that the influence of the waterway excavation on tidal current field is not significant， except a slight variation of the current speed along the dredged section. The annual siltation volume is less than 7 million m3， and the sudden siltation will not happen under the strong-wind weather conditions. Therefore， the feasibility of the waterway excavation in the northern Lanshayang tidal channel preliminarily proved would be available. |
| Key words: radial sand ridges waterway excavation tidal current sediment silting up numerical simulation |
