Rectangular Contracted Weir
This calculator finds the water flow rate for a rectangular contracted weir. A rectangular contracted weir has a rectangular opening where the sides are straight up and down. A contracted weir means that the ditch leading up to the weir is wider than the weir opening itself.
* Note: 1 point = 1/100 ft.
The Equation used to determine the flow rate of a Rectangular Contracted Weir is:
= Flow Rate in cfs.
= Bottom width of the weir in feet.
= Height of the upstream water above the weir crest in feet.