Question 2 A canal with a 4.0 m wide rectangular cross section, a gradient of 0.0003 and Manning's coefficient of 0.013 incorporates a sharp-crested side weir to divert flow into a secondary canal. The side weir is 8.0 m long and has its crest 1.10 m above the main channel bed. The diversion rate is controlled by a vertical sluice gate in the main canal, a short distance downstream of the end of the side weir. Determine the discharge diverted when the discharge downstream of the sluice gate is 8.0 m /s and the gate opening is 1.0 m. If required, carry out water surface profile calculations with 2 computational steps