三峡库区细沙输移运动状态的水槽试验研究

李沛霖; 杨胜发; 周倩倩; 李倩

doi:10.11988/ckyyb.20160159

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长江科学院院报 ›› 2017, Vol. 34 ›› Issue (5) : 1-4. DOI: 10.11988/ckyyb.20160159

江湖泥沙与治理

三峡库区细沙输移运动状态的水槽试验研究

李沛霖¹, 杨胜发¹, 周倩倩², 李倩¹

作者信息 +

Flume Experiment of Fine Sediment Transport in the Three Gorges Reservoir

LI Pei-lin¹, YANG Sheng-fa¹, ZHOU Qian-qian², LI Qian¹

Author information +

文章历史 +

摘要

三峡库区内淤积泥沙均属细颗粒泥沙范畴,运动规律较为复杂。依靠传统泥沙理论即以挟沙力为判断标准,所得冲淤情况与实际观测情况有所出入,需进行进一步研究。在三峡库区典型淤沙河段——皇华城河段现场观测的基础上,通过水槽试验研究库区细颗粒泥沙的运动特点,对不同水深流速下细颗粒泥沙的运动状态进行归类整理,发现其淤积过程可根据水深与流速的不同划分为3个区域,即冲刷区、相对平衡输送区及淤积区,并指出用流速作为判断细沙输移状态的标准更符合库区实际冲淤情况。

Abstract

Most sediment deposition in the Three Gorges Reservoir is fine sediment with complex transport laws. The erosion and deposition calculated from traditional theories, in which sediment carrying capacity is regarded as a criterion, is inconsistent with actual measurement results. On the basis of field measurement results of Huanghuacheng reach, a typical reach of sediment deposition, flume experiment was conducted to further explore the transport of fine sediment. According to the experimental data, three different areas can be divided according to flow velocity and water depth: erosion area, sediment transport area with relative equilibrium, and deposition area. The discriminating standard of critical condition of erosion or deposition status was not determined by the comparison between sediment concentration and sediment carrying capacity, but by the flow rate.

导出引用

李沛霖, 杨胜发, 周倩倩, 李倩. 三峡库区细沙输移运动状态的水槽试验研究[J]. 长江科学院院报. 2017, 34(5): 1-4 https://doi.org/10.11988/ckyyb.20160159

LI Pei-lin, YANG Sheng-fa, ZHOU Qian-qian, LI Qian. Flume Experiment of Fine Sediment Transport in the Three Gorges Reservoir[J]. Journal of Changjiang River Scientific Research Institute. 2017, 34(5): 1-4 https://doi.org/10.11988/ckyyb.20160159

中图分类号： TV143.4

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