Question

A soil has discharge velocity of $5\times {10}^{-7}$ m/s and a void ratio of 0.50. Its seepage velocity will be

• A. $15\times {10}^{-7}m/s$
• B. $10\times {10}^{-7}m/s$
• C. $20\times {10}^{-7}m/s$
• D. $30\times {10}^{-7}m/s$

Answer 1

The correct option is A $15\times {10}^{-7}m/s$

Porosity is expressed as

$n=\frac{e}{1+e}=\frac{0.5}{1+0.5}=\frac{1}{3}$

Seepage velocity,

$v_s=\frac{v}{n}=\frac{5\times {10}^{-7}}{1/3}$

$=15\times {10}^{-7}m/s$