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Abstract
Analytic stage-discharge formulae are derived for flow in straight trapezoidal channels, based on the 2D analytic velocity distribution in open channels given by Shiono and Knight [Shiono K, Knight DW, Turbulent open-channel flows with variable depth across the channel. J Fluid Mech 1991;222:617-46]. A simple hand-calculation method is provided. Legendre incomplete elliptic integrals of the first and second kinds and a binomial series expansion are used in the derivation of these analytic formulae, together with physically based hydraulic parameters, such as local friction factor (f), dimensionless eddy viscosity (lambda) and secondary flow (Gamma). The stage-discharge results obtained from the formulae are shown to be in good agreement with experimental data, as are the corresponding analytic velocity and boundary shear stress distributions. The influences f, lambda and Gamma on the stage-discharge relationship are also discussed. (C) 2007 Elsevier Ltd. All rights reserved.
Original language | English |
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Pages (from-to) | 2283-2295 |
Number of pages | 13 |
Journal | Advances in Water Resources |
Volume | 30 |
Issue number | 11 |
DOIs | |
Publication status | Published - 1 Nov 2007 |
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Dive into the research topics of 'Analytic stage-discharge formulae for flow in straight trapezoidal open channels'. Together they form a unique fingerprint.Projects
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The Inclusion of vortical flow Structures in Analytic Debth - Averaged Fow Models of Flooding
Knight, D.
Engineering & Physical Science Research Council
1/01/06 → 30/06/07
Project: Research Councils