Q.2 A rectangular channel of width 5 m carries a discharge of 8 m³ s¹. The 16 man streamwise slope of the channel is 1.0

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Q 2 A Rectangular Channel Of Width 5 M Carries A Discharge Of 8 M S The 16 Man Streamwise Slope Of The Channel Is 1 0 1 (382.69 KiB) Viewed 48 times

Q.2 A rectangular channel of width 5 m carries a discharge of 8 m³ s¹. The 16 man streamwise slope of the channel is 1.0x104 and Manning's roughness coefficient may be taken as 0.015. At one point there is a localized narrowing to width 2 m. a) Assuming a long undisturbed fetch upstream, calculate the depth of flow far upstream of the narrow point. b) Compute the critical depth and the critical specific energy at the narrow point. c) Determine the water depths at the narrow point and at stations just up and downstream of the contracted section if the channel bed in the contracted section is: 1. the same as the main channel; 2. raised by 0.75 m; 3. lowered by 0.75 m. (CLO 1, PLO 1)