A rectangular channel, 20ft wide, carries 400 cfs and discharges onto a 20 ft wide apron with no slope with a mean velocity of 20 fps. What is the height of the hydraulic jump? What energy is lost in the jump?

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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 A rectangular channel, 20ft wide, carries 400 cfs and discharges onto a 20 ft wide apron with no slope

with a mean velocity of 20 fps. What is the height of the hydraulic jump? What energy is lost in the

jump?

2. At a certain section of a rectangular channel 10 ft wide, the depth of flow is 2 ft and the flow rate is 400

ft3/s. If a hydraulic jump occurs, will it be upstream or downstream of this section? Prove answer using

calculation.

3. Water flows over a spillway into a sluice 10 m wide. Before the jump the water has a depth of 1 m and a

velocity of 18 m/s. Determine the Froude number before the jump and the depth of flow after the jump

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