Computation of Normal and Critical Depths in Parabolic Cross Sections
Bachir Achour *, 1, Mohammed Khattaoui 2
Identifiers and Pagination:Year: 2008
First Page: 9
Last Page: 14
Publisher Id: TOCIEJ-2-9
Article History:Received Date: 17/1/2008
Revision Received Date: 21/2/2008
Acceptance Date: 21/2/2008
Electronic publication date: 6/3/2008
Collection year: 2007
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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.