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What is the flow rate in a trapezoidal shaped riprap (n = 0.03) lined channel th

ID: 1920285 • Letter: W

Question

What is the flow rate in a trapezoidal shaped riprap (n = 0.03) lined channel that has a bottom width of 10-feet, side slopes of 2.5:1 (H:V), a bed slope of 0.004, and a depth of flow of 4-feet deep?

Answer

a.

1,231 cfs

b.

466 cfs

c.

692 cfs

d.

175 cfs


Flow down a spillway has a discharge of 320 cfs.  The spillway is 8-feet wide and discharges into a similar width rectangular channel.  If the depth of flow at the toe of the hydraulic jump is 1.0 foot, what is the height of the hydraulic jump?

Answer

a.

4.51 feet

b.

9.48

c.

5.75 feet

d.

8.48 feet

e.

7.15 feet

a.

1,231 cfs

b.

466 cfs

c.

692 cfs

d.

175 cfs

Explanation / Answer

c.

692 cfs

a.

4.51 feet

c.

692 cfs

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