Longitudinal dispersive coefficient in channels with aquatic vegetation: A review
[浏览次数:857 ] [更新时间:2023-9-30]
作者
Liu Yang, Hao-ze Fang, Zhong-hua Yang, Wen-xin Huai
发表日期
2023/7/20
来源
Journal of Hydrodynamics
页码范围
1-17
出版商
Springer Nature Singapore
简介
The determination of longitudinal dispersion coefficient in rivers is necessary for pollution control, environmental risk assessment, and management. In rivers with aquatic vegetation, the flow field is remarkably modified by canopies, which affects velocity profiles and dispersion characteristics dominated by the heterogeneity of the velocity field. The dispersion is deduced from lateral and vertical longitudinal velocity gradients for compound channels with vegetated floodplains and rectangular channels with river-wide vegetation, respectively. Although many efforts have been exerted to clarify the dispersion process in different conditions and predict the diffusion of contaminants in vegetated rivers, no studies have introduced it systematically. This study reviews the dispersion coefficient characteristics, including magnitude, main impacted factors, and relationships with flow and vegetation features, in channels with …