Question

Which of the following equation defines Darcy’s law?

(a) q=KA

(b) q=K/A

(c) q=K i A

(d) q=K i/A

I got this question in an internship interview.

This intriguing question comes from Darcy’s Law topic in portion Permeability of Geotechnical Engineering I

Answer 1

The correct answer is (c) q=K i A

The best I can explain: According to Darcy’s law, the rate of flow or discharge per unit area is proportional to the hydraulic gradient.

q α i

q = K i A, where K =Darcy’s coefficient of permeability

A = total cross-sectional area.