Dimensionless Curves for Normal-Depth Calculations in Canal Sections
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VIEW THE REPLYPublication: Journal of Irrigation and Drainage Engineering
Volume 127, Issue 6
Abstract
Normal depth is an important parameter for the design of irrigation canals. Direct analytical solution of normal depth is not possible because of the implicit nature of governing equations. The solution usually requires tedious techniques of trial and error. Tabular and graphical methods are only available for more common cross sections. This problem has been previously addressed for some cross sections (i.e., rectangular, triangular, trapezoidal, and circular) and the calculation of normal depth in these cross sections has been reported in the literature. Reported herein are graphical solutions for normal depth in other cross sections (i.e., round-bottomed triangular, parabolic, and round-corner rectangular).
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References
1.
Attari, J., and Foroghi, A. M. ( 1995). “Explicit formulae for estimation of normal depth in channels.” Proc., 26th Congr. Int. Assn. for Hydr. Res., Vol. 5, Thomas Telford, London, 7–12.
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Chow, V. T. ( 1958). Open channel hydraulics, McGraw-Hill, New York.
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French, R. H. ( 1986). Open channel hydraulics, McGraw-Hill, New York.
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Henderson, F. M. ( 1966). Open channel flow, Macmillan, New York.
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Swamee, P. K. (1994). “Normal-depth equation for irrigation canals.”J. Irrig. and Drain. Engrg., ASCE, 120(5), 942–948.
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Received: Jan 4, 2001
Published online: Dec 1, 2001
Published in print: Dec 2001
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