TY - JOUR
T1 - Flow through layered vegetation in open channel flows: effect on velocity and discharge distribution
AU - Tang, Xiaonan
AU - Singh, Prateek K.
AU - Guan, Yutong
AU - Li, Ming
PY - 2023/12
Y1 - 2023/12
N2 - In natural river systems, layered vegetation like grass, shrubs, and tall bushes greatly affects the biodiversity, morphological process, and distribution of nutrients and pollutants. Previously, the effects of uniform one-layered vegetation on the flow structure and hydrodynamics have been extensively studied. However, due to the complexity of flow dynamics in the vegetated channel, multiple-layered vegetation has rarely been investigated. This paper presents a novel experiment to show the effect of three-layered vegetation on open channel flow. It contributes to our understanding of the impact of vegetation locations and heights on the velocity and discharge distributions for a mixed vegetated channel flow. Velocities at different positions along a half cross-section were measured using a mini propeller velocimetry. Observed results showed that the velocity has a distinct profile directly behind vegetation and behind the vegetation gap. The overall trend has two specific inflections about one quarter below (0.75 z/h) or near the top of short vegetation (h): the velocity remains nearly constant in the bottom layer (z/h
AB - In natural river systems, layered vegetation like grass, shrubs, and tall bushes greatly affects the biodiversity, morphological process, and distribution of nutrients and pollutants. Previously, the effects of uniform one-layered vegetation on the flow structure and hydrodynamics have been extensively studied. However, due to the complexity of flow dynamics in the vegetated channel, multiple-layered vegetation has rarely been investigated. This paper presents a novel experiment to show the effect of three-layered vegetation on open channel flow. It contributes to our understanding of the impact of vegetation locations and heights on the velocity and discharge distributions for a mixed vegetated channel flow. Velocities at different positions along a half cross-section were measured using a mini propeller velocimetry. Observed results showed that the velocity has a distinct profile directly behind vegetation and behind the vegetation gap. The overall trend has two specific inflections about one quarter below (0.75 z/h) or near the top of short vegetation (h): the velocity remains nearly constant in the bottom layer (z/h
U2 - 10.1007/s10652-023-09960-y
DO - 10.1007/s10652-023-09960-y
M3 - Article
SN - 1573-1510
JO - Environmental Fluid Mechanics
JF - Environmental Fluid Mechanics
ER -