水利水电科技进展2026，Vol.46Issue(3)：64-72,9.DOI:10.3880/j.issn.1006-7647.2026.03.009
刚性植被斑块分布形式对明渠水流特性的影响
Effects of rigid vegetation patch distribution patterns on open-channel flow characteristics
摘要
Abstract
To investigate the influence of vegetation patch distribution patterns on open-channel flow characteristics,three vegetation patch coverage ratios and four patch fragmentation degrees were designed under non-submerged conditions.Numerical simulations of flow through longitudinally discontinuous rigid vegetation patches in a river channel were conducted using ANSYS Fluent.The results show that the longitudinally discontinuous distribution of vegetation patches disrupts the continuity and uniformity of flow velocity in the flow field.When the unit patch size is constant,an increase in vegetation patch coverage ratio leads to a greater velocity difference between the patch region and the mainstream region.When the vegetation patch coverage ratio is constant,an increase in patch fragmentation degree promotes the homogenization of flow velocity across the entire flow field.Flow turbulence is relatively strong in the region from the vegetation bottom to half of the water depth,and both patch coverage ratio and patch fragmentation degree are important factors affecting turbulence intensity.An increase in patch coverage ratio enhances turbulence characteristics in the mainstream region,whereas an increase in patch fragmentation degree intensifies turbulence characteristics within the patches.关键词
水流特性/植被/斑块覆盖度/斑块破碎度/数值模拟Key words
flow characteristics/vegetation/patch coverage ratio/patch fragmentation degree/numerical simulation引用本文复制引用
李国豪,李书芳,张景洲,于子铖,周正..刚性植被斑块分布形式对明渠水流特性的影响[J].水利水电科技进展,2026,46(3):64-72,9.基金项目
国家重点研发计划项目(2023YFC3209402) （2023YFC3209402）
河北省自然科学基金青年科学基金项目(A类)(E20244021407) （A类）
河北工程大学创新基金项目(SJ2401002176) （SJ2401002176）
