| 摘要: |
| 我国浅水湖泊多存在水域宽广、流路不稳、动力较弱的特点,水动力提升困难。本研究以厦门市杏林湾为例,构建了二维水动力水交换数学模型,提出湖区水体净化设备动能点源布局方法,模拟单设备点源及多设备点源运行下水体交换效果,重塑湖泊流场。结果表明,取水点源宜于宽阔水域布置,单设备取水点源与排水点源宜相近布置,相邻设备取水点源与排水点源宜恰当衔接,使得水体循环连续。多设备联合运行初期,水动力呈现单设备独立运行特征；联合运行后期,水动力呈现协同性效应,单设备驱动外的空白区域形成次生循环,提升了湖区全域动力条件以及交换能力。本文为封闭湖泊的水环境治理提供了新的思路与方法。 |
| 关键词: 封闭湖泊 内循环 水动力 水交换 |
| DOI： |
| 分类号: |
| 基金项目:江苏省水利科技项目(2024021) |
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| Reshaping of Global Hydrodynamic Patterns in Weakly Dynamic Lakes Based on Water Purification Kinetic Energy |
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LI Shouqian1, ZHOU Shihuan1, NI Lan2, DAI Guangjie3, WANG Zhili1, LU Yongjun1, Wang Haipeng4
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1.River and Coastal Engineering Department,Nanjing Hydraulic Research Institute;2.Shanghai Municipal Engineering Design Institute (Group) Co., Ltd;3.Agriculture,Rural Affairs and Water Resources Bureau of Jimei District;4.Nanjing Hydraulic Research Institute
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| Abstract: |
| Shallow lakes in China are generally characterized by broad water areas, unstable flow paths, and weak hydrodynamics, making hydrodynamic improvement challenging. Taking Xinglin Bay in Xiamen City as an example, this study establishes a two-dimensional hydrodynamic and water exchange mathematical model, proposes a method for the kinetic energy point source layout of water purification equipment in the lake area, and simulates the water exchange effects under single-point-source and multi-point-source operations to reshape the flow field of the lake. The results indicate that water intake point sources should be arranged in broad water areas; the intake and discharge point sources of a single device should be placed close to each other, while the intake and discharge point sources of adjacent devices should be properly connected to ensure continuous water circulation. In the early stage of multi-device joint operation, the hydrodynamics exhibit characteristics similar to those of single-device operation; in the later stage, a synergistic effect emerges, with secondary circulations forming in the blank areas beyond the influence of individual devices, thereby enhancing the overall hydrodynamic conditions and exchange capacity of the lake area. This study provides new ideas and methods for the water environment management of enclosed lakes. |
| Key words: enclosed lake internal circulation hydrodynamics water exchange |
