Recommendations
UASB check-list: hydraulic parametersCircular weirAtmospheric pressure given altitudeHazen-Williams equation head lossDynamic viscosity of atmospheric airHead loss coefficient of a partially open butterfly valve
Circular channel - critical depth
Critical depth

Input data

Incoming flow

Diameter

Manning coefficient

Output data

Critical depth

Critical slope

Description

Calculates the critical depth in circular channels.

Critical depth

Calculation Methods

1. Critical depth

ParameterDefault UnitsDescription
Incoming flowl/sVolume of water entering the channel
DiametermmDiameter of the circular channel
Manning coefficient-Roughness factor affecting flow

Output Data

ParameterDefault UnitsDescription
Critical depthmDepth of critical flow
Critical slope-Critical slope required for flow
Flowm³/sCalculated flow in the channel

References

  • SILVESTRE, P. Hidráulica geral. Rio de Janeiro, LTC, 1979.