online_vee_notch2: Calculation of discharge
through a partially contracted 90° Vnotch weir

Formula:
Head H on the weir, in cm [or ft]
Width B of the channel, in cm [or ft]
Height P to the weir crotch, in cm [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° Vnotch weir: H/B ≤ 0.4
Fully contracted weir calculator
See USBR Manual for general methodology

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171119 18:08:09 ].
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