Question

Given below are two statements:
Statement (I): Isotropic and homogeneous aquifers seldom occur in nature.
Statement (II): Water level measurements during pumping test are made in observation wells installed close to the well or at some distance away from it.
In light of the above statements, choose the most appropriate answer from the options given below.

• A. Both Statement (I) and Statement (II) are correct.
• B. Both Statement (I) and Statement (II) are incorrect.
• C. Statement (I) is correct but Statement (II) is incorrect.
• D. Statement (I) is incorrect but Statement (II) is correct.

Hint:

Recall that real aquifers are rarely uniform, and pumping tests rely on a network of observation wells at different distances.

Answer 1

The Correct Option is A

Step 1: Real aquifers are made of layered sediments or fractured rock, so their permeability changes with both location and direction; this is exactly why the ideal assumption of an isotropic, homogeneous aquifer is a simplification rarely matched in the field, supporting Statement (I).
Step 2: A pumping test needs data on how drawdown spreads outward from the pumped well over time and distance. To capture this, engineers place a network of observation wells at varying radii, some near and some far from the pumped well, and read the water levels in them, which is precisely Statement (II).
\[\boxed{\text{Both Statement (I) and Statement (II) are correct}}\]