Chezy Coefficient

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Chezy coefficient, abbreviated as C, a dimensionless number, dependent on surface roughness and the hydraulic mean depth.

 

Chezy coefficient formulas

\(\large{ C = \frac{1}{n} \; r_h^{1/6}   }\) 
\(\large{ C = \frac{v_m}{ \sqrt{ \; r_h \; m }   }   }\) 

Where:

 Units English Metric
\(\large{ C }\) = Chezy coefficient \(\large{ dimensionless }\)
\(\large{ r_h }\) = hydraulic radius \(\large{ ft }\) \(\large{ m }\)
\(\large{ v_m }\) = mean velocity \(\large{ \frac{ft}{sec} }\)  \(\large{ \frac{m}{s} }\) 
\(\large{ n }\) = roughness coefficient \(\large{ dimensionless }\)
\(\large{ m }\) = slope \(\large{ ft }\)  \(\large{ m }\) 

 

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Tags: Equations for Coefficient Equations for Open Channel