Hazen-Williams Equation Flow through an Open Channel

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Hazen-Williams method is only valid for water flowing at ambient temperatures, the Darcy-Weisbach method should be used for other liquids or gases. The Hazen-Williams Equation can be used for flow through an open channel or through a pressurized pipe.

Hazen-Williams Equation flow through an open channel formula

\(\large{ v = k C  r^{0.63} m^{0.54}   }\)


\(\large{ v }\) = mean flow velocity

\(\large{ k }\) = conversion factor

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

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

\(\large{ r }\) = hydraulic radius


Tags: Equations for Open Channel Equations for Hazen-Williams