Allied & ICAR Exam Bank • ALLIED_0925 MCQ • 1 Mark

Section 5: Irrigation and Drainage Engineering

Drainage Engineering and Salt Management

Subtopic: Agricultural Drainage Principles

Question Statement:

The Glover-Dumm equation models subsurface drain spacing under unsteady state conditions for:

Options:

  • (A) Transient drawdown of the water table midway between parallel drain lines following heavy rainfall or irrigation recharge
  • (B) Steady rainfall equal to steady drain discharge
  • (C) Radial flow to a pumped artesian well
  • (D) Canal lining seepage

Answer Key:

A

Step-by-Step Solution & Explanation

Glover-Dumm applies Fourier series solutions to linearized Boussinesq equations to determine the rate of transient water table recession ($h_t / h_0 = \frac{8}{\pi^2} \exp(-\pi^2 K d t / (\mu S^2))$) between drain pipes.
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