Research Article
Jun 1981
Minimum Specific Energy in Compound Open Channel
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VIEW THE REPLYPublication: Journal of the Hydraulics Division
Volume 107, Issue 6
Abstract
A compound-channel Froude number is derived to reflect correctly the occurrence of minimum specific energy in open channels with overbank flow. The limitations of conventional Froude-number formulations are described and comparisons with the proposed compound-channel Froude number are presented. The results of a laboratory investigation into the occurrence of two points of minimum specific energy are presented, and this phenomenon can occur for certain compound-channel geometries as predicted by the compound-channel Froude number. The experimental investigation indicates that the upper point of minimum specific energy can properly be considered the limit of subcritical flow.
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Published In
Journal of the Hydraulics Division
Volume 107 • Issue 6 • June 1981
Pages: 699 - 717
Copyright
© 1981 American Society of Civil Engineers.
History
Published in print: Jun 1981
Published online: Feb 3, 2021
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Authors
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Merritt E. Blalock, M.ASCE
Hydro., United States Geological Survey, Atlanta Ga.; formerly, President's Fellow, Georgia Inst. of Tech., Atlanta, Ga. 30332
Terry W. Sturm, AM.ASCE
Asst. Prof., School of Civ. Engrg., Georgia Inst. of Tech., Atlanta, Ga. 30332
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.