Wetted perimeter of a regime channel for a discharge of 64 cumecs as per Lacey's theory will be:

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OSSC JE Civil Mains Official Paper: (Held On: 16th July 2023)
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  1. 19 m
  2. 38 m
  3. 57 m
  4. 76 m

Answer (Detailed Solution Below)

Option 2 : 38 m
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Detailed Solution

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Explanation:

According to Lacey's theory, following formulae has been given below:

  1. Hydraulic mean depth, 
  2. Area of the channel section, 
  3. Wetted perimeter, 
  4. Regime mean velocity, 
  5. Bed Slope, 


Calculation:

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