Question

The seepage occuring through an earthen dam is represented by a flow net comprising of 10 equipotential drops and 20 flow channels. The coefficient of permeability of the soil is 3 mm/min and the head loss is 5 m. The rate of seepage (expressed in $c{m}^3/s$ per m length of the dam) through the earthen dam is .

• A. 500

Answer 1

The correct option is A 500
$q=kH\frac{N_f}{N_d}=\frac{3\times {10}^{-3}}{60}\times 5\times 2$

$=5\times {10}^{-4}{m}^3/s/m$

$q=500c{m}^3/s/m$