Question

Water is flowing through the permeability apparatus as shown in the figure. The coefficient of permeability of the soil is k m/s and the porosity of the soil sample is 0.50.

What are the discharge velocity and seepage velocity, respectively through the soil sample?

• A. k, 2k
• B. $\frac{2}{3}k,\frac{4}{3}k$
• C. 2k, k
• D. $\frac{4}{3}k,\frac{2}{3}k$

Answer 1

The correct option is A k, 2k

From Darcy's Law

Discharge velocity,

v = ki

= k . 1

= k

$Seepagevelocity=\frac{Dischargevelocity}{porosity}$

$=\frac{k}{0.5}$

= 2k