1. Hydraulic Features of Flow Through Local Non- Submerged Rigid Vegetation in the Y-shaped Confluence Channel
- Author
-
Zian Wang, Jingjing Liu, Liu Xiaodong, Ruoshui Li, Ting Yang, Zulin Hua, and Tong Xuneng
- Subjects
lcsh:Hydraulic engineering ,Geography, Planning and Development ,Flow (psychology) ,Y-shaped confluence channel ,Aquatic Science ,Biochemistry ,lcsh:Water supply for domestic and industrial purposes ,lcsh:TC1-978 ,Tributary ,medicine ,Acoustic Doppler velocimetry ,Geomorphology ,Water Science and Technology ,turbulent kinetic energy ,lcsh:TD201-500 ,geography ,geography.geographical_feature_category ,longitudinal velocity ,Internal flow ,Secondary flow ,non-submerged rigid vegetation ,secondary flow ,Confluence ,Turbulence kinetic energy ,medicine.symptom ,Vegetation (pathology) ,Geology - Abstract
A laboratory measurement with acoustic Doppler velocimeter (ADV) was used to investigate the flow through a Y-shaped confluence channel partially covered with rigid vegetation on its inner bank. In this study, the flow velocities in cases with and without vegetation were measured by the ADV in a Y-shaped confluence channel. The results clearly showed that the existence of non-submerged rigid plants has changed the internal flow structure. The velocity in the non-vegetated area is greater than in the vegetated area. There is a large exchange of mass and momentum between the vegetated and non-vegetated areas. In addition, due to the presence of vegetation, the high-velocity area moved rapidly to the middle of the non-vegetated area in the vicinity of tributaries, and the secondary flow phenomenon disappeared. The presence of vegetation made the flow in non-vegetated areas more intense. The turbulent kinetic energy of the non-vegetated area was smaller than that of the vegetated area.
- Published
- 2019