Question Bank • QB_SUB_IDE_0015 NAT • 2 Marks

Section 5: Irrigation and Drainage Engineering

Groundwater Hydrology

Subtopic: Groundwater movement; Darcy's Law

Question Statement:

In an unconfined aquifer with an effective porosity of $\eta_e = 0.25$, Darcy velocity is measured as $v = 0.40\text{ m/day}$. The actual seepage velocity of groundwater (in m/day) is:

Answer Key:

1.6

Step-by-Step Solution & Explanation

Seepage velocity: $v_s = \frac{v}{\eta_e} = \frac{0.40}{0.25} = 1.60\text{ m/day}$
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