Accurately calculate water flow rate through a V-notch triangular weir with our free online tool. Perfect for civil engineering, hydrology, and irrigation, this calculator uses the precise formula to determine discharge based on weir angle and head. Understand fluid dynamics and optimize your designs.
Formula:
The flow rate (Q) over a V-notch triangular weir is typically calculated using the following formula:
Q = Cd * (8/15) * √(2g) * tan(θ/2) * H5/2
Where:
- Q: Flow Rate (e.g., m³/s or ft³/s)
- Cd: Discharge Coefficient (dimensionless, typically 0.58 - 0.62; common value 0.6)
- g: Acceleration due to Gravity (9.81 m/s² for Metric or 32.2 ft/s² for Imperial)
- θ: Notch Angle (degrees)
- H: Head (depth of water above the notch apex, e.g., meters or feet)