# Hydraulic Depth

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Hydraulic depth, abbreviated as $$d_h$$, also called hydraulic mean depth, is the area cross-section of water in a pipe or channel divided by the wetting perimeter.

## Hydraulic Depth formula

 $$\large{ d_h = \frac { A_c } { w } }$$

### Where:

$$\large{ d_h }$$ = hydraulic depth

$$\large{ A_c }$$ = area cross-section of flow

$$\large{ w }$$ = fluid top width