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length of weir formula. The flow to a circular clarifier is 690000 gallons per day. The flow over a V-notch weir in ft 3 s is given by the Kindsvater-Shen equation.
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However the coefficient does not. 17 Actual length of crest of a weir with end contractions. Q is the volumetric flow rate of fluid in ft 3 s.
In the three-dimensional case of a weir of finite width b with discharge Qm3s1in a channel of finite width B two more length scales are involved.
Q Flow Ls H Head of water approaching the weir m L Weir Length m L H Measurement point of H m Z Proximity zone Figure D-1. To see how this formula is developed you need to refer to the lab experiment page on broad crested weirs. 14-inch circular weir for 18-inch pipe. 17 Actual length of crest of a weir with end contractions.
