水利学报2018，Vol.49Issue(1)：62-71,10.DOI:10.13243/j.cnki.slxb.20170969
小浪底水库异重流高效输沙理论与调控
Theory and regulation of sediment turbidity current venting with high efficiency in Xiaolangdi Reservoir
摘要
Abstract
Efficient sediment releasing is the key operation to prolong the project life for the Xiaolangdi Reservoir.Under the condition of impoundment,high release efficiency can be achieved by increasing the ratio of output to input sediment load during turbidity current events and reducing the deposition from the stagnant layers created by turbidity currents.Combining the methods of theoretical study,flume experiments and field data analyses,this paper investigates the dynamic conversion between different flow regimes for sediment transport in reservoirs,the hydrodynamics for sediment transport of turbidity currents,the variations in physical parameters of the stagnant layers and their response to flow conditions.A momentum equation for turbidity currents was proposed,with the correction factors of pressure and momentum being included,and a plunge criterion was derived for turbidity currents under complex flow conditions.Moreover,the formulas were proposed for calculating the velocity and discharge of turbidity currents intruding the tributaries,and multiple regression analyses were conducted for the estuary sandbar elevation and deposition volume of the tributaries.The responsive characteristics of the stagnant layers to subsequent floods were investigated.Finally,the operation principles for efficient sediment releasing were also provided.关键词
异重流潜入/支流倒灌/滞留层/高效排沙/小浪底水库Key words
turbidity current plunging/intrusion into tributary/stagnant layer/efficient sediment release/Xiaolangdi Reservoir分类
建筑与水利引用本文复制引用
张俊华,马怀宝,夏军强,李涛,王远见..小浪底水库异重流高效输沙理论与调控[J].水利学报,2018,49(1):62-71,10.基金项目
国家自然科学基金项目(51679103,51509103,51509100) （51679103,51509103,51509100）
水利部公益性行业科研专项经费项目(201401023) （201401023）
