Question

A soil has a discharge velocity of 8 x 10 m/s and a void ratio of 0.4. Its seepage velocity is

Answer 1

it is given that,

discharge velocity, v = 8 × 10 m/s = 80 m/s

void ratio , e = 0.4

so, porosity = e/(1 + e) = 0.4/(1 + 0.4)

= 0.4/1.4 = 2/7

now, seepage velocity = discharge velocity/porosity

= 80/(2/7)

= 80 × 7/2

= 280 m/s

hence, seepage velocity = 280m/s