Question

Consider the following statements
The coefficient of permeability k depends upon
1. void ratio of the soil.
2. duration of flow.
3. equivalent diameter of the soil grains.
4. shape of the particle.
Which of these statements are correct?

• A. 1, 2, 3 and 4
• B. 2 and 3 only
• C. 1, 3 and 4 only
• D. 3 and 4 only

Answer 1

The correct option is C 1, 3 and 4 only

(c)
Since permeability is the property governing the ease with which a fluid flows through the soil, it depends on the characteristics of the fluid or permeant as well as those of the soil.
Mathematically,

$C{D}_s^2.\frac{\gamma }{\mu }.\frac{e^3}{1+e}$

where k is coefficient of permeability, $D_s$ is effective particle size, $\gamma$ is unit weight of permeant, $\mu$ is viscosity of permeant, e is void ratio and C is shape factor.