Allied & ICAR Exam Bank • ALLIED_0919 MCQ • 1 Mark

Section 5: Irrigation and Drainage Engineering

Well Hydraulics and Groundwater

Subtopic: Well Hydraulics and Groundwater

Question Statement:

When two identical fully penetrating wells pump simultaneously in an extensive homogeneous confined aquifer, the total drawdown at any observation point is obtained by:

Options:

  • (A) Linear superposition (sum of the individual drawdowns caused by each well pumping independently)
  • (B) Multiplying the two drawdowns
  • (C) Taking the square root of sum of squares
  • (D) Subtracting the smaller drawdown from the larger

Answer Key:

A

Step-by-Step Solution & Explanation

Because the governing Theis/Laplace differential equation for flow through saturated porous media is linear, the principle of superposition applies: total drawdown $s = s_1 + s_2 + \dots + s_n$.
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