The discharge through rectangular channel is maximum when Hydraulic mean depth m is equal to ______________?
Correct answer: D. depth/ 2
- A. depth/ 3
- B. 2 / 3 depth
- C. depth/ 4
- D. depth/ 2
Explanation
For the most economical rectangular channel, the width is twice the depth, so the hydraulic mean depth or hydraulic radius becomes depth divided by two. This gives maximum discharge for a given cross-sectional area.
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