| 引用本文: | 张 鹏,单卫国,欧阳丽,等.椒（灵）江建闸水动力变化及闸下泥沙
淤积分布模拟与验证[J].灌溉排水学报,2026,45(2):82-90. |
| ZHANG Peng,SHAN Weiguo,OUYANG Li,et al.椒（灵）江建闸水动力变化及闸下泥沙
淤积分布模拟与验证[J].灌溉排水学报,2026,45(2):82-90. |
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| 摘要: |
| 【目的】揭示八仙岩建闸对椒（灵）江潮流动力与闸下淤积演化的影响机制。【方法】结合数值模拟与物理模型，系统分析建闸后水沙响应及淤积空间分布特征。【结果】建闸显著削弱近闸区（前10 km）潮汐通量，涨/落潮量降幅超30%，近闸段流速下降75%~90%，含沙量同步衰减；中远程（10~40 km）潮流逐步恢复，含沙量表现为“下游向上游输移”，体现“潮流衰减-泥沙截留-再悬浮”的动态循环。枯水年呈“快速初始淤积-逐步平衡-前推演化-远区稳定”的四阶段演变规律，5 a总淤积量约2 300万m3后趋于平衡。【结论】数模精准量化淤积深度梯度与横向异质性，物模直观复现宏观地形演变，共同验证“潮流动力衰减-河宽空间扩张-河口动力重构”为闸下淤积的核心控制机制。该研究可进一步为感潮河口建闸工程的水沙调控提供理论支撑。 |
| 关键词: 潮量变化；含沙量；淤积分布；数值模拟 |
| DOI：10.13522/j.cnki.ggps.2025212 |
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| Simulation and validation of hydrodynamics and sediment deposition during sluice construction in the Jiao (Ling) river |
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ZHANG Peng, SHAN Weiguo, OUYANG Li, HE Huaijie
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1. Power China Huadong Engineering Corporation Limited, Hangzhou 311122, China;
2. Linhai Industrial Investment Group Co., Ltd., Taizhou 317000, China;
3. Power China Jiangsu Engineering Corporation Limited, Nanjing 211100, China
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| Abstract: |
| 【Background and Objective】Estuarine sluices are widely used for flood control and water management, but their construction can significantly alter tidal dynamics and sediment transport, leading to downstream siltation, which affects navigation, ecology and flood safety. Understanding these processes is critical for sustainable management of tidal rivers. This paper investigates the impact of the Baxianyan sluice on tidal dynamics and downstream siltation in the Jiao (Ling) River estuary. 【Method】We used numerical simulation and physical modeling to systematically analyze hydrodynamic and sedimentary responses, as well as the spatial patterns of siltation after sluice construction The numerical model simulated the changes in tidal flux, flow velocities and sediment transport, while the physical model reproduced the morphological evolution under controlled laboratory conditions.【Result】In the near-field zone (within 10 km), the sluice reduced the high-and low-tide volumes by more than 30%, and the flow velocity by 75%-90%, accompanied by a synchronous attenuation of sediment concentration. In the mid-to-far zone (10-40 km), tidal currents gradually recovered, and sediment transport exhibited an ‘upstream migration from downstream’ pattern, reflecting a dynamic cycle of ‘tidal energy attenuation-sediment trapping- resuspension’ During dry years, sediment deposition evolved in four stages: ‘rapid initial accumulation-progressive balance-downstream migration-distal stabilization’ Five years after the sluice construction, total siltation asymptotically reached 23 million m3. The numerical model accurately captured the longitudinal gradients and lateral heterogeneity of the sediment deposition, while the physical model accurately reproduced the large-scale morphological changes, both showing that tidal energy attenuation, channel widening, and restructuring of estuarine hydrodynamics were the primary drivers of downstream siltation.【Conclusion】Our results demonstrate that the combination of numerical and physical models are robust for predicting and analyzing siltation processes in estuarine sluice projects. The identified ‘tidal energy attenuation-channel widening-hydrodynamic reconstruction’ mechanism can help improve sediment management in tidal estuarine engineering constructions. |
| Key words: tidal flux variation; sediment concentration; sediment deposition pattern; numerical simulation |
