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RESEARCH ARTICLE

Computation of Normal and Critical Depths in Parabolic Cross Sections

Bachir Achour , * Open Modal , 1 Mohammed Khattaoui 2 Authors Info & Affiliations
The Open Civil Engineering Journal • 6 Mar 2008 • RESEARCH ARTICLE • DOI: 10.2174/1874149500802010009

Abstract

With a suitable non-dimensionalization, the available charts for normal depth computation in parabolic sections are reduced to a single dimensionless curve when either Manning's or Chezy's resistance equation is used. Moreover, simple approximate solutions are presented to compute normal depth with a quite adequate degree of accuracy. Upon rearranging the critical-flow criterion equation, relevant explicit relationships are derived for this state of flow. The procedure of normal and critical depths calculation is clearly described through some examples.

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