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Discharge through a broad-crested weir

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Discharge through a broad-crested weir

Applying the Bernoulli's equation to the points H and y shown in the figure,

H+0+0 = v2^2/2g+0+y
(Approach velocity at the point H is neglected.)

Then,

v2 = (2g*(H-y))^(1/2)

If the length of the broad-crested weir is
L, the discharge Q is :

Q = L*y*(2*g*(H-y))^(1/2)

*** Âü°í¹®Çå[References] ***

FLUID MECHANICS Eighth Edition, KOREAN STUDENT EDITION, Victor L. Streeter, E. Benjamin Wylie, McGRAW-HILL, 1986.
Q = L*y*(2*g*(H-y))^(1/2)
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