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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Hydro-environment : Turbulence intensity in open-channel flows with submerged flexible vegetation
Turbulence intensity in open-channel flows with submerged flexible vegetation
Author : NINA NIKORA(1), VLADIMIR NIKORA(2)
ABSTRACT
A number of empirical and semi-empirical models for vertical profiles of turbulence intensities in smooth- and rough-bed
flows, such as gravel-bed rivers, have been developed in recent years. However, no models describing turbulence
intensity profiles in vegetated channels have yet been proposed. This paper presents a new multi-segment approach
used to model turbulence intensities in vegetated channels. Within this framework, different concepts are applied to
specific flow regions and the overall turbulence intensity profile is represented with a set of linked segments. As a result,
a set of turbulence intensity models for flow regions within and above the vegetation canopy are given. The models have
been tested using extensive laboratory experiments covering wide ranges of background flow and vegetation
parameters. The analysis also focused on identification of the effects of flow and roughness parameters on the model
coefficients and overall performance
File Size : 845,001 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Hydro-environment
Date Published : 20/08/2015
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