Abstract: Farm irrigation system management depends on accurate measurement of water flow and good water delivery program. Flow over rectangular side weirs were experimentally investigated in a laboratory to verify the coefficient of discharge of side weirs for subcritical flow using Shabayek Non-Linear Combination Model. A physical model was constructed and series of experimental tests were carried out. Effects of upstream Froude number and sill height on the coefficient of discharge of the side weirs were examined at sill heights of 0.06, 0.10 and 0.14 m and weir crest lengths of 0.04, 0.055, 0.07, 0.085 and 0.10 m for each sill height. The sill heights were varied with the channel bed slope between 2.94 and 6.23%. To show the relationship of coefficient of discharge Cd with both upstream Froude number Fr and ratio of sill height to upstream flow depth S/Y1 taken separately, linear regression analysis was used in analyzing experimental data while multiple regression analysis was used in showing the relationship of Cd with both Fr and S/Y1 taken together. Graphical models developed showed that these relationships follow the same trend with previous research works.
Temitayo Abayomi Ewemoje and Olufemi Peter Abimbola, 2014. Verification of Discharge Coefficient of Rectangular Side Weirs Using Shabayek Mode. Research Journal of Applied Sciences, 9: 397-401.