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 • 上一篇    下一篇

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   

  1. 1.重庆交通大学 国家内河航道整治工程技术研究中心, 重庆 400074;
    2.徐州市水利科学研究所,江苏 徐州 221000
  • 收稿日期:2016-02-29 修回日期:2016-04-27 出版日期:2017-05-01 发布日期:2017-05-01
  • 作者简介:李沛霖(1991-),女,河南禹州人,硕士研究生,主要从事河道治理及航道工程方面的研究,(电话)023-62647196(电子信箱)aglindsay@163.com。
  • 基金资助:
    国家重点研发计划项目(2016YEC0402104); 重庆市研究生科研创新项目(CYS16175)

Flume Experiment of Fine Sediment Transport in the Three Gorges Reservoir

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

  1. 1.National Engineering Research Center for Inland Waterway Regulation, Chongqing Jiaotong University,Chongqing 400074, China;
    2. Xuzhou Institute of Hydraulic Research, Xuzhou 221000, China
  • Received:2016-02-29 Revised:2016-04-27 Published:2017-05-01 Online:2017-05-01

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。

关键词: 三峡水库, 常年回水区, 细颗粒泥沙, 原型观测, 水槽试验, 泥沙冲淤

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.

Key words: Three Gorges Reservoir, backwater area, fine sediment, prototype observation, flume experiment, erosion and deposition

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