GATE CE 2014 Set 2 — Question 53
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Water Resources Engineering → Open Channel Flow → Critical Flow
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Question
A rectangular channel of width is carrying a discharge of . Considering that acceleration due to gravity as , the velocity of flow (in m/s) corresponding to the critical depth (at which the specific energy is minimum) is _______
Correct answer
2.45 to 2.55
Solution
For a rectangular channel, the critical depth () is given by the formula:where is the discharge per unit width () and is the acceleration due to gravity.
1.Calculate discharge per unit width ():
2.Calculate critical depth ():
3.Calculate velocity at critical depth ():
Alternatively, using the relation :The velocity of flow corresponding to the critical depth is approximately .Continue learning with Success Tracker
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