Water is flowing in a 3000 mm width prismatic rectangular channel with a bed slope of 1:1050 and Manning's roughness n of 0.016. A 1 m height broad-crested weir is planned to be built in the channel. The total discharge in the channel is 10 cubic meter per second.
Calculate the expected flow depths (i) above the hydraulic structure, and (ii) at upstream and downstream of the broad-crested weir.
Conclude your answer by sketching the flow profile in the channel and the respective specific energy curve for this hydraulic problem.