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- W933089976 abstract "The purpose of this study is to investigate the roughness characteristics and the velocity profile in vegetated and non-veg-elated channels through hydraulic model experiments, and to find a relationship between the velocity profile and the roughness height. The velocity is logarithmically distributed from the channel bottom to 0.8 of flow depth(h) in the non-vegetated channel and from the upper part of vegetation to 0.8 of flow depth() over the vegetation deflected by the flow in vegetated channel. The elevation() corresponding to zero velocity is calculated by using measured velocity profiles. In a non-vegetated channel, is 0.18 of mean diameter(d) of crushed rock over the channel bottom and in a vegetated channel, is 0.40 of mean height() of deflected vegetation. The roughness height is calculated by using velocity profiles in a vegetated channel and it is shown that the flow resistance tends to increase with the density of vegetation. The velocity profiles measured in a vegetated channel is a relatively good agreement with those predicted from formulae proposed by Kouwen et al.(1969), Haber(1982) and El-Hakim et al.(1992)." @default.
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- W933089976 date "2004-01-01" @default.
- W933089976 modified "2023-09-23" @default.
- W933089976 title "Roughness Characteristics and Velocity Profile in Vegetated and Nonvegetated Channels" @default.
- W933089976 hasPublicationYear "2004" @default.
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