Water is flowing in a rectangular channel 20 ft wide at a discharge of 300 cfs. The channel is running on a slope of XXXXXXXXXXwith a Manning n value of XXXXXXXXXXA small spillway 15 ft high is placed...

Water is flowing in a rectangular channel 20 ft wide at a discharge of 300 cfs. The channel is running on a slope of 0.0025 with a Manning n value of 0.030. A small spillway 15 ft high is placed across the channel. If the Francis C value for the spillway is 3.1 (with reference to the actual head on the crest),

a. What is the normal depth in the channel?

b. To what depth will the water rise behind the spillway?

c. Ignoring losses, what will be the depth at the toe of the spillway?

d. What is critical depth in this situation?