Using Lacey's formula for the wetted perimeter, what is the value of the constant P in the equation P = ______ (Q)^{1/2} for determining the waterway of a weir?

Water Management MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Water Managementagriculture-mcqs › water-management
Published
29 Mar 2019
Last updated
28 May 2026

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Explanation

The constant P in Lacey's wetted perimeter formula for calculating the weir waterway is 4.75, as given by P = 4.75 × (Q)^{1/2}.

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