Flow resistance of emergent vegetation
Year: 2004
Type: article
Abstract: Conventional resistance equations (such as those of Manning, Chézy and Darcy–Weisbach) are inappropriate for flow through emergent vegetation, where resistance is exerted primarily by stem drag throughout the flow depth rather than by shear stress at the bed. An alternative equation form is suggested, in which the resistance coefficient is related to measurable vegetation characteristics and can incorporate bed roughness when this is significant. Equation performance is confirmed by comparison of predicted and measured stage–discharge relationships for flow through artificial cylindrical stems, and by comparison of calibrated and measured drag coefficient values for natural vegetation.
Source: Journal of Hydraulic Research
Institutions: University of the Witwatersrand, University College Dublin
Language: English
Subfield: Earth-Surface Processes
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: green
Funder: Water Research Commission
OpenAlex ID: W4235764071