The GATE Grind

GATE 2018 CE (CE2) – Question 22

Hydrology · Ground water hydrology, well hydraulics and aquifers · 1 mark · Multiple choice

Dupuit assumptions are valid for ______.

  1. artesian aquifer
  2. confined aquifer
  3. leaky aquifer
  4. unconfined aquifer

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Show answer and explanation

Correct answer: (D) unconfined aquifer

Explanation

The conventional Dupuit approximation for water-table flow assumes nearly horizontal streamlines and a hydraulic gradient represented by the water-table slope. It is used in deriving well-flow relationships for an **unconfined aquifer, D**, whose saturated thickness varies with head.