Development and Application of a Reservoir-Channel- Floodplain Coupling Model System for Flow and Sediment Transport in the Middle and Lower Yellow River

被引：0
|
作者：
Xia J. [1 ]
Wang Z. [1 ]
Wang Y. [1 ]
Zhang X. [1 ,2 ]
机构：
[1] State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan
[2] School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou
来源：
Yingyong Jichu yu Gongcheng Kexue Xuebao/Journal of Basic Science and Engineering | 2020年 / 28卷 / 03期
关键词：
Flood; Floodplain flood; Flow and sediment transport; Middle and Lower Yellow River; Modelling system; Reservoir operation; Turbidity current; Xiaolangdi Reservoir;
D O I：
10.16058/j.issn.1005-0930.2020.03.013
中图分类号：
学科分类号：
摘要：
Reservoir sedimentation control and flood control in downstream rivers are two major objectives in the basin management of the Middle and Lower Yellow River, for which a modelling system is developed to simulate processes of flow and sediment transport in reservoirs, channels and floodplains collaboratively.The system consists of a one-dimensional (1D) reservoir model and a 1D river channel model, a two-dimensional (2D) floodplain model and a reservoir operation module.The reservoir model can simulate the generation, propagation and venting processes of turbidity currents by solving the turbid open channel flow equations and turbidity current equations alternatively.The governing equations are all established with full consideration to the coupling of flow and sediment transport and bed deformation processes, and the numerical schemes adopted are based on the finite volume method with shock-capturing ability.The reservoir operation module allows the users to combine different operation modes to customize a complete operation rule.The modelling results of the water and sediment regulation in 2012 agreed with the measurements, regarding water levels and turbidity current propagation in the reservoir and sediment concentrations in the Lower Yellow River.An analysis was conducted on the effects of vegetation resistance on propagation speed and deposition distribution of a flooding process in the Dongming floodplain area.The system was applied to simulate the routing of the 1958-type flood with the operation of the Xiaolangdi Reservoir.Modelling results show that the released maximum discharge from the reservoir was about 9 000m3/s under the operation rule of flood control, and the peak discharge at Huayuankou was reduced by 3 982m3/s, with 3.68×108t and 1.33× 108t of sediment deposited in the reservoir and the Lower Yellow River, respectively. © 2020, The Editorial Board of Journal of Basic Science and Engineering. All right reserved.
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页码：652 / 665
页数：13
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