Considering the von Karman Prandtl equation for pressurized tubes, Kazemipour & Apelt (1980) developed a methodology for flow calculation in smooth circular channels, denominated as method of Kazemipour. Inspite of good results, the Kazemipour method needs graphic tools in its application, which makes its solution through computational methods and comparison to other existing methodologies difficult. In this research, the results of the analytic investigation that provides the validation of the Kazemipour method are shown, as well as the adjustments according to procedure proposed by Silva & Figueiredo (1993), performed in such a way to make the procedure independent of graphic tools. The result obtained is satisfactory and its use is presented in an example of practical application.
Irrigation; discharge; hydraulics
