# Seepage Velocity

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Seepage velocity, abbreviated as $$v_s$$, represent the actual velocity of a fluid flowing through the void spaces in the soil.

## Seepage Velocity formulas

 $$\large{ v_s = \frac { v \; A_c} { A_v} }$$ $$\large{ v_s = \frac { v} { P} }$$

### Where:

$$\large{ v_s }$$ = seepage velocity

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

$$\large{ A_v }$$ = area cross-section of voids

$$\large{ v }$$ = darcy velocity or flux

$$\large{ P }$$ = porosity

### Solve for:

 $$\large{ A_c = \frac { v_s \; A_v} { v} }$$ $$\large{ A_v = \frac { v \; A_c} { v_s} }$$ $$\large{ v = \frac { v_s \; A_v} { A_c} }$$ $$\large{ v = v_s \; P }$$