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A laboratory test on a sample from an aquifer revealed a porosity of 35%. The… — Answer & Solution | Civexa

Hydrology · Groundwater Hydrology

Groundwater Hydrology MCQ with answer and solution

A laboratory test on a sample from an aquifer revealed a porosity of 35%. The specific yield of the aquifer will be

Solution

Concept

Specific yield vs porosity

Formula

Sy = n − Sr

Step-by-step solution

1. Porosity = specific yield + specific retention. 2. So specific yield is less than porosity (0.35).

Explanation

Part of the water is retained against gravity.

Why the other options are wrong

Equal or more than porosity is impossible.

Shortcut

Sy < n.

Correct answer: B) less than 0.35

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