The laminar transition to turbulent flow is usually occurred at any flow of liquid but what make it difference are their velocity and other condition. The main objective of this study was to understand how laminar flow transition to turbulent occurred in open \nchannel flow and designed an open channel model. Their effect is studied and thoroughly the Reynolds number that suitable for each laminar, transition and turbulent \nflow condition are determined. The method of study was discussed and the data will be plotted in the form of Pressure against Velocity by using a simple program, which has been made using Visual Basic language. The results obtained from this study of open channel could not achieved laminar flow because of inadequate equipment and parts. Besides, errors on the design have only been realized after the design has been produced.