长江科学院院报 ›› 2020, Vol. 37 ›› Issue (3): 1-5.DOI: 10.11988/ckyyb.20190959

• 专家特约稿 • 上一篇    下一篇

水温分层水库中大规模高浓度泥沙侵入及长期浊水放流问题的对策

陈飞勇1,2, 堀田哲夫2, 刘兵1   

  1. 1.山东建筑大学 资源与环境创新研究院,济南 250101;
    2.日本株式会社建设技术研究所,东京 103-8430
  • 收稿日期:2019-08-07 出版日期:2020-03-01 发布日期:2020-05-09
  • 通讯作者: 刘 兵(1982-),男,山东栖霞人,教授,博士,主要研究方向为水处理、环境数学模型。E-mail:b-liu@sdjzu.edu.cn
  • 作者简介:陈飞勇(1963-),男,湖南益阳人,日本工程院外籍院士,主任研究员,博士,主要从事水源地管理与环境保护工程研究工作。E-mail:ctokyo@hotmail.com
  • 基金资助:
    山东建筑大学基金项目(03030101,XNBS1824);山东省重点研发计划项目(2019GSF109064)

Behaviors of Large Turbid Current and Countermeasures for Long-term Turbidity Problem in Stratified Reservoir

CHEN Fei-yong1,2, HOTTA T2, LIU Bing1   

  1. 1.Research Institute of Resources and Environmental Innovation, Shandong Jianzhu University, Jinan 250101, China;
    2.CTI Engineering Co., Ltd., Tokyo 103-8430, Japan
  • Received:2019-08-07 Online:2020-03-01 Published:2020-05-09

摘要: 用数值模型描述了水温分层水库中大规模高浓度泥沙流入时的水动力学现象,定量研究并讨论了如何改善这种情况下水库形成的长期浊水化现象。在大流量、高浓度时,洪水水流沿着水库底部向下游高速流动,撞击大坝后造成的回流形成洪水的混浊水体与水库内周围环境水体的混合,导致水库长时间浑浊,形成长期浊水放流。该机理提示了减少洪水后库内混浊水体积的可能性。数值实验表明,如果合理采用选择性取水设备,或通过下层泄洪口可以成功地减少混浊水和清洁水体的混合,将洪水后库内残余混浊水的量减少88%。进一步的计算表明,如果可以改变温度跃层的位置或泄洪口的高程,则可以控制洪水时泥水在水库中的流动,以改善洪水后浊水放流的状况。

关键词: 浊水, 温度分层, 选择性取水, 洪水, 泥沙, 水库, 对策

Abstract: The hydrodynamic behavior of large turbid current in stratified reservoir is depicted through numerical calculation results, and the succeeding long-term turbidity is quantitatively analyzed. The large volume current with dense sediment flows towards the downstream along the bottom of reservoir, and the backwater after clashing dam contributes much to the mixing of turbid water with surroundings, causing prolonged turbidity in the reservoir. This mechanism implied possible treatments to reduce the volume of the turbid water. Numerical experiments indicate that successfully purging the turbid water by a low layer outlet, such as a selective withdrawal device, reduces the residual turbid water in reservoir by 88%. Further calculations demonstrate that changing the stratification condition or the outlet elevation in reservoir is conducive to controlling the behavior of sediment flow, hence alleviating the turbidity problem after flood.

Key words: turbid current, stratification, selective withdrawal, flood, sediment, reservoir, countermeasures

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