Hydraulic Radius

Hydraulic radius, abbreviated as \(r_h\), is the area cross-section of water in a pipe or channel divided by the wetting perimeter.

 

 

 

 

 

 

 

 

Hydraulic radius formula
\(\large{ r_h =  \frac{  A_c }{ P_w }  }\)
Symbol	English	Metric
\(\large{ r_h }\) = hydraulic radius	\(\large{ ft }\)	\(\large{ m }\)
\(\large{ A_c }\) = area cross-section of flow	\(\large{ ft^2 }\)	\(\large{ m^2 }\)
\(\large{ P_w }\) = wetting perimeter	\(\large{ ft }\)	\(\large{ m }\)