Question 1 a) The trapezoidal channel shown in Figure Qla is made of brickwork and slopes at 1:500, Determine the flow rate if the normal depth is 80 cm. ii. Determine the normal depth for which the flow rate will be 8 m³/s 30° 30° 2 m Figure Qla (4 marks) h b) Flow under the sluice gate is shown in Figure Q1b. If,-5 m and all losses are neglected except the dissipation in the jump, calculate yz and ya and the percentage of dissipation. The channel is horizontal and wide. (6 marks) sm ewp Jump V₁ = 2 m/s " Y3 22/1+8 Fr") Figure Qlb Q₁ = 62 A, V₁ = A₂ V. b) One square tank with a single pipe system was filled with water as shown in Figure Q3. The diameter of pipe is 4 cm, pipe length is 11 m and the friction factor of pipe is 0.01. Calculate the time to empty the tank. cd 4 m (6marks) 3 m 5 m Figure Q3