泥沙研究2025，Vol.50Issue(3)：17-24,8.DOI:10.16239/j.cnki.0468-155x.2025.03.003
有效悬浮功临界条件下异重流运动特征分析
Analysis of the movement characteristics of turbidity currents under the critical conditions of effective suspension power
摘要
Abstract
Sediment transported by the turbidity currents in reservoirs are always in a state of over-saturation.Under the influence of sediment effective suspension power,turbidity currents can achieve long-distance transport.However,the movement characteristics of turbidity currents under the critical conditions of sediment effective suspension power have not yet been revealed.This study focuses on the movement characteristics of turbidity currents under the critical state conditions of sediment effective suspension power.Turbidity currents control equations are established,and the self-similarity theory of turbidity currents is used to analyze their movement characteristics in equilibrium.The results show that in the critical self-suspension state,the sediment entrainment coefficient increases with the increase in grain size,the decrease in slope,and the increase in resistance.In equilibrium,the Richardson number increases with the increase in resistance and the decrease in slope,while the mixing coefficient of clear and turbid water decreases with the increase in the Richardson number.The sediment effective suspension power was also used to analyze the movement of the turbidity currents in the Xiaolangdi Reservoir.It is found that the sediment effective power weakens when the turbidity current moves downstream.To achieve efficient sediment discharge in reservoirs,the sediment effective power should be less than zero,which means an appropriate reservoir bottom slope and finer grain size in the turbidity current is necessary to be constructed,which can provide a theoretical basis for sedimentation reduction and maintaining effective reservoir capacity in sediment-laden rivers.关键词
有效悬浮功/异重流/小浪底水库Key words
effective suspension power/turbidity current/Xiaolangdi Reservoir分类
建筑与水利引用本文复制引用
李彬,高兴,鲁俊,白玉川,任晓光..有效悬浮功临界条件下异重流运动特征分析[J].泥沙研究,2025,50(3):17-24,8.基金项目
"十四五"国家重点研究计划课题(2023YFC3206703) （2023YFC3206703）
国家自然科学基金项目(51979185,52109097) （51979185,52109097）
黄委优秀人才科技项目(HQK-202319) （HQK-202319）
黄河勘测规划设计研究院有限公司自立科研项目(2025KY001) （2025KY001）
