水利水电科技进展2025，Vol.45Issue(2)：1-8,8.DOI:10.3880/j.issn.1006-7647.2025.02.001
悬移质垂线分布规律与影响因素研究
Study on vertical distribution law and influencing factors of suspended sediment
摘要
Abstract
To address the deficiencies of traditional diffusion models,a mixing length coefficient model was introduced to establish a vertical distribution model of suspended sediment.The effects of different factors on the vertical distribution of suspended sediment were investigated.The results show that when the actual mixing length coefficient is smaller than the commonly assumed value of 0.4,the sediment concentration calculated using the assumed value is overestimated,and vice versa.An increase in sediment concentration intensifies particle interactions,and the vertical distribution of sediment concentration presents a characteristic of"smaller at the upper part and larger at the lower part".Larger particle size results in greater sediment settling velocity,causing more sediment to accumulate near the bottom and making suspension more difficult.Higher flow velocity enhances vertical turbulence,reducing the sediment concentration gradient between the riverbed and the water surface.关键词
悬移质垂线分布/泥沙扩散系数/有限掺混理论/掺混长度系数/泥沙群体沉速Key words
suspended sediment vertical distribution/sediment diffusivity/finite mixing theory/mixing length coefficient/sediment group settling velocity分类
水利科学引用本文复制引用
练继建,吴峰,刘昉,姚烨..悬移质垂线分布规律与影响因素研究[J].水利水电科技进展,2025,45(2):1-8,8.基金项目
国家重点研发计划项目(2022YFB4200701) （2022YFB4200701）
云南省重点研发计划项目(202203AA080009-03) （202203AA080009-03）
