Explanation: Permeability depends on both soil properties and Fluid properties
The kozney – Carman equation is quite useful, it reflects the effect of factors that affect permeability
k=+D102 Where,
D10 is effective grain size
e is the void ratio
μ is viscosity ,
γw is unit weight of water
a)
Grain size: The coefficient of permeability includes D102, where D10 is a measure of grain sizeIf the void ratio is the same then permeability is more in coarse soil than in the fine soil
b)
Void ratio: From the equation, it is clear that k ∝
e2 If the particle size is the same, then loose soils are more permeable than dense soils
c)
Degree of saturation: Permeability is directly proportional to the degree of saturation
d) Particle shape: It is expressed in terms of specific surface area and permeability relates to specific surface area as ‘k ∝ 1/S2 ‘