Question

1. (35 pts) A rectangular, unfinished concrete channel is designed to be 28 ft wide with a slope of 8ft/mile. The design flow rate is 400 ft/s. (a) (5 pts)

Sketch this problem (b) (5 pts) What is the value of k and n in the Manning equation for this problem? (c) (15 pts) What is the expected flow depth? (d) (3 pts) What is the average velocity? (e) (2 pts) Give one practical reason why an channel engineer might be concerned about the flow speed in a demand (f) (3 pts) What is the Froude number for this flow? (g) (2 pts) Does this Froude number make sense? Explain.

Question image 1Question image 2Question image 3Question image 4Question image 5Question image 6Question image 7Question image 8