Relationship between Manning's coefficient (η) and Chezy's coefficient (C) is given by : (R is hydraulic radius)

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UKPSC JE Civil 8 May 2022 Official Paper-II
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  1. C = R2/3
  2. C = R1/6
  3. C = R1/3
  4. C = R1/4

Answer (Detailed Solution Below)

Option 2 : C = R1/6
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UKPSC JE CE Full Test 1 (Paper I)
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Detailed Solution

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Calculation:

Chezy's Formula:

  ............................ (i)

Manning's Formula:

  .......................... (ii)

where C = Chezy's Constant

R = Hydraulic Radius

S = Hydraulic Gradient Line

 n = Manning's Roughness Coefficient

From equations (i) and (ii)

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