Effect of swaying motion of floating vegetation on wind-induced entrainment phenomenon in closed water body

When floating vegetation grows on the water surface in a closed water body, the vegetation counteracts the magnitude of the wind acting on the water surface, and affects the fluid flow and the water quality variation in it. In this study, in order to investigate the counteraction effect of the luxur...

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Bibliographic Details
Published in:Paddy and water environment 2008-06, Vol.6 (2), p.171-180
Main Authors: Ozaki, Akinori, Mori, Ken
Format: Article
Language:English
Subjects:
Agriculture
Biomedical and Life Sciences
Density stratification
Ecotoxicology
Entrainment
Fluid flow
Freshwater
Geoecology/Natural Processes
Hydraulics
Hydrogeology
Hydrology/Water Resources
Life Sciences
Soil Science & Conservation
Turbulence
Vegetation
Water bodies
Water quality
Wind tunnels
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Summary:When floating vegetation grows on the water surface in a closed water body, the vegetation counteracts the magnitude of the wind acting on the water surface, and affects the fluid flow and the water quality variation in it. In this study, in order to investigate the counteraction effect of the luxuriant growth of floating vegetation on the fluid flow and water quality in the closed water body, we conducted hydraulic experiments on wind-induced flow with density stratification using a wind tunnel test tank and imitated vegetation. We used imitated vegetation made from polystyrene foam plates instead of using real floating vegetation. And we experimentally considered the effect of the vegetation using the concept of the wind-induced entrainment phenomenon. In particular, we focused the effect of the occupation rate and the swaying motion of vegetation. The results indicated that the swaying motion of imitated floating vegetation had an effect on the scale of entrainment. In addition the results had the same tendency as the previous study on the wind-induced entrainment phenomenon.
ISSN:1611-2490
1611-2504
DOI:10.1007/s10333-008-0120-3