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Flow Rate Calculation for a Rectangular Weir

Author: kimioChanExecutions: 102396
TOP/Shared Formulas (Engineering)/Civil & Mechanical

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Water level at the weir h=
(m)
Channel width B=
(m)
Lower edge of the weir at the bottom of the waterway D=
(m)
Width of the rectangular weir notch b=
(m)
Flow coefficient K= 
Flow rate Q= (m³/min)
Flow Rate Calculation for a Rectangular Weir (Using the JIS Formula)
Q = K*b*h^(3/2)
K = 107.1 + (0.177/h) + 14.2 * (h/D) - 25.7 * ((B - b) * h / (D * B))^(1/2) + 2.04 * (B/D)^(1/2)

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