Analytic Stage-Discharge Formulas for Flow in Straight Prismatic Channels
Publication: Journal of Hydraulic Engineering
Volume 133, Issue 10
Abstract
Three analytic stage-discharge formulas, suitable for hand calculation, have been derived for prismatic open channels. The three types of prismatic geometry investigated are: simple rectangular, symmetric, and asymmetric rectangular compound channels. The formulas include three key parameters that govern the local friction factor, eddy viscosity, and secondary flow. The discharge results and the corresponding analytic depth-averaged velocity and bed shear stress distributions show good agreement with the experimental data, even when constant parameter values are assumed. The influence of these three parameters on the stage-discharge relationships is explored.
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Acknowledgments
The writers gratefully acknowledge the financial support of The Engineering and Physical Sciences Research Council (EPSRC Grant No. UNSPECIFIEDEP/D50385X/1) and the financial support of Trans-Century Training Program Foundation for the Talents by the State Education Commission of China.
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Information
Published In
Journal of Hydraulic Engineering
Volume 133 • Issue 10 • October 2007
Pages: 1111 - 1122
Copyright
© 2007 ASCE.
History
Received: Apr 11, 2006
Accepted: Feb 9, 2007
Published online: Oct 1, 2007
Published in print: Oct 2007
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