Allied & ICAR Exam Bank • ALLIED_1224 MCQ • 1 Mark

Section 5: Irrigation and Drainage Engineering

Well Hydraulics and Groundwater

Subtopic: Dupuit-Forchheimer Assumptions

Question Statement:

The classical Dupuit-Forchheimer theory for steady unconfined seepage assumes that:

Options:

  • (A) Flow is horizontal, equipotential surfaces are vertical, and hydraulic gradient equals the slope of the phreatic line
  • (B) Flow is purely vertical without lateral movement
  • (C) Fluid is completely compressible
  • (D) Capillary fringe is infinitely thick

Answer Key:

A

Step-by-Step Solution & Explanation

Dupuit assumed that streamlines are parallel and horizontal, making pressure hydrostatic and the hydraulic gradient invariant with depth, simplifying 2D unconfined flow to 1D analysis.
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