Dimensional analysis technique known as Buckingham's nt method is used to check the dimensional homogeneity of an equation derived from some experimental data. It was found out that from the experimental data, the discharge (Q) over a rectangular weir depends on the fluid head (H) over the weir, acceleration due to gravity (g), length of weir crest (L), height of the weir crest over the channel bottom (Z) and kinematic viscosity (M) of the liquid. Identify the dimension that represent all the variables mentioned above and determine the number of the primary dimensions, Subsequently suggest the number of T-term