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Circular weir
Calculate head
Calculate flow
Calculate diameter

Input data

Flow (Q)

Diameter (D)

Output data

Head (h)

Description

Design and rate circular weirs. This calculation enables the determination of flow, head, and diameter for circular weirs using the following equation:

 

Q=1.518D0.693H1.807Q = 1.518 D^{0.693} H^{1.807}

Circular Weir Image

Available Calculation Methods:

  • Calculate head (h): Determines the water height over the weir based on the flow rate and diameter.

    • Inputs: Flow (Q), Diameter (D)
    • Outputs: Head (h)

  • Calculate flow (Q): Determines the flow rate for a given diameter and head.

    • Inputs: Diameter (D), Head (h)
    • Outputs: Flow (Q)

  • Calculate diameter (D): Determines the necessary diameter for a given flow rate and head.

    • Inputs: Flow (Q), Head (h)
    • Outputs: Diameter (D)

References

  • AZEVEDO NETTO, J. M. de; FERNANDEZ Y FERNANDEZ, Miguel. Manual de hidráulica, 9.ed. São Paulo: Blucher, 2015.