A wide rectangular channel 4 m wide and normal bed slope 1 in 5000 conveys a constant discharge of 30.0 m3/s. Let the normal depth of flow at a particular section is yn. Assume Manning’s n = 0.012. Which of the following is correct?
1
yn = 3.04 m and flow is super critical.
2
yn = 3.04 m and flow is sub–critical.
3
yn = 2.00 m and flow is super critical
4
yn = 2.00 m and flow is sub–critical