online_vee_notch2: Calculation of discharge
through a partially contracted 90° V-notch weir
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]
Ce is a function of H/P and
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
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