Question

Given below are two statements, one is labeled as Assertion (A), and the other one labeled as Reason (R).
Assertion (A): Darcy's law is valid for a steady and stationary flow process in the soil.
Reason (R): In a steady flow condition, potential and gradient at every point in the flow path remain constant.
In light of the above statements, choose the most appropriate answer from the options given below:

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A).
• B. Both (A) and (R) are correct but (R) is NOT the correct explanation of (A).
• C. (A) is correct but (R) is not correct.
• D. (A) is not correct but (R) is correct.

Hint:

For transient/unsteady flow, where water content changes over time, Darcy's law is combined with the mass conservation (continuity) equation to form the Richards' equation.

Answer 1

The Correct Option is A