# Mean Depth

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Mean depth, abbreviated as $$h_m$$, is the average water depth in a stream channel or conduit computed by dividing the cross-section area by the surface width.

### Mean Depth FORMULA

$$\large{ h_m = \frac { A } { T } }$$

Where:

$$\large{ h_m }$$ = mean depth

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

$$\large{ T }$$ = top of water surface width

Solve for:

$$\large{ A = h_m \; T }$$

$$\large{ T = \frac {A} { h_m } }$$