Hazen-Williams Equation Flow Rate

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

This flow rate formula is used in Hazen-Williams equations and the coefficient formula.  This formula only works for ambient temperatute and turbulent flow.

Hazen-Williams Equation flow Rate formula

\(\large{ Q =  0.285 \; C\; d^{2.63} \;  m^{0.54}  }\)


\(\large{ Q }\) = flow rate

\(\large{ C }\) = Hazen-Williams Coefficient

\(\large{ m }\) = hydraulic grade line slope

\(\large{ d }\) = pipe inside diameter (ID)


Tags: Equations for Pipe Sizing Equations for Hazen-Williams