Question

According to Darcy's law for flow through porous media, the velocity is proportional to

• A. effective stress
• B. hydraulic gradient
• C. cohesion
• D. stability number

Answer 1

The correct option is B hydraulic gradient

Darcy's law: In one dimensional flow, discharge through fully saturated soil is given by Darcy

q = K i A
or V = k i
v $\alpha$ i

where,

q = Discharge

A = Cross-section area of soil corresponding to flow 'q'

K = Coefficient of permeability

i = Hydraulic gradient

v = Superficial velocity of flow or discharge velocity.

Hence the option (b) is correct.