GATE CE 2018 Set 1 — Question 33
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Water Resources Engineering → Open Channel Flow → Critical Flow
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Question
A wide rectangular channel carries a discharge of under critical condition. Using , the specific energy (in m, up to two decimal places) is ______
Correct answer
1.1 to 1.2
Solution
Given:
For a rectangular channel, the critical depth is given by the formula:Step 3: Calculate the specific energy at critical condition ():
For a rectangular channel, the minimum specific energy (which occurs at critical depth) is:Rounding to two decimal places, the specific energy is . The official acceptable range is to .
- Width of the rectangular channel,
- Discharge,
- Acceleration due to gravity,
For a rectangular channel, the critical depth is given by the formula:Step 3: Calculate the specific energy at critical condition ():
For a rectangular channel, the minimum specific energy (which occurs at critical depth) is:Rounding to two decimal places, the specific energy is . The official acceptable range is to .
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