# French Drain Seepage Rate Calculator

Posted by Dinesh onThis calculator calculates the **seepage rate or flow per foot of trench(ql)** using permeability(k), area normal to flow per foot of trench(a), flow line slope(s) values.

## French Drain Seepage Rate Calculation

### Formula:

Q_{L}=KAS

Q

_{L}= Seepage Rate or Flow per Foot of Trench,

K = Permeability,

A = Area Normal to Flow per Foot of Trench,

S = Flow Line Slope.