Calculation of discharge through a partially contracted 90-degree V-notch weir, V notch weir, vee notch weir, triangular weir, Victor Miguel Ponce, San Diego State University

    online_vee_notch2: Calculation of discharge through a partially contracted 90° V-notch weir

Formula:

Q = 4.28 C_e (H + 0.0029)^5/2          [in U.S. Units]

Head H on the weir, in m [or ft]
Width B of the channel, in m [or ft]
Height P to the weir crotch, in m [or ft]
C_e is a function of H/P and P/B

Discharge Q in L/s [or cfs]
For a partially contracted 90° V-notch weir: H/B ≤ 0.4
Fully contracted weir calculator
See USBR Manual for general methodology

INPUT DATA:       [Description]

Select Units:

Head H :


[ H > 0 ]

Width B :


[ B > 0 ]

Height P :


[ P > 0 ]

OUTPUT:

Warning: Ratio H/B = 0 < 0.2.
Weir is fully contracted.

Discharge Q : 0



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