WWRC 93-13
Calibration of Long Crested Weir Discharge Coefficient
Abstract
Long crested weirs are used in open-channel irrigation distribution systems to
minimize fluctuations in the canal water surface above canal turnouts. The
object of this report was to develop an equation for the long crested weir
discharge coefficient so that the weirs could be used to measure canal
flowrates. Sixty-seven different weir models were tested and several general
discharge equations were developed which predicted the flowrate to within
plus or minus five percent.
93-13 Table of Contents
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