Question:

In a porous media, the velocity of the percolating fluid is directly proportional to the hydraulic gradient. This statement was proposed by

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When water flows through a porous medium like soil, the rate of flow depends on the slope of the energy (head) line, called the hydraulic gradient.
Updated On: Jun 16, 2026
  • Henry Darcy
  • Coulomb
  • Stoke
  • Allen Hazen
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The Correct Option is A

Solution and Explanation

Concept:
When water flows through a porous medium like soil, the rate of flow depends on the slope of the energy (head) line, called the hydraulic gradient.

Step 1:
The relationship states that the discharge velocity \(v\) is directly proportional to the hydraulic gradient \(i\), written as \(v = k\,i\), where \(k\) is the coefficient of permeability.

Step 2:
This fundamental law of groundwater flow was established experimentally by the French engineer Henry Darcy in 1856, and it is therefore known as Darcy's law.

Answer: Option (1) — Henry Darcy.
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