Discharge over a rectangular notch
TheoryConsider a rectangular notch in one side of a tank over which water is flowing as shown in figure. Let,
- H = Height of water above sill of notch
- b = Width or length of the notch
- Cd = Coefficient of discharge
The total discharge over the whole notch, may be found out by integrating the above equation within the limits 0 and H.
Example - Discharge over a rectangular notch
A rectangular notch 0.5m wide has constant head of 400 mm. Find the discharge over the notch in liters per second, if the coefficient of discharge for the notch is 0.62.
- b = 0.5 m
- H = 400 mm = 0.4 m
- Cd = 0.62
Discharge over the notch = 231 liters/s