Question

Free moving water table is characteristically present in which type of aquifer system?

• A. Confined aquifer
• B. Artesian aquifer
• C. Unconfined aquifer
• D. Aquiclude

Hint:

Aquifer types: \[ \boxed{ \begin{aligned} \text{Unconfined aquifer} &\rightarrow \text{Free water table}\\ \text{Confined aquifer} &\rightarrow \text{Pressure surface (no free water table)} \end{aligned} } \]

Answer 1

The Correct Option is C

Step 1: Recall the basic aquifer types.
Aquifers are classified as unconfined, confined or artesian, and aquicludes, based on whether their upper surface is open to the atmosphere or sealed off.
Step 2: Identify which one has a free water table.
In an unconfined aquifer, the top surface is open through permeable soil, so its upper boundary, the water table, is free to rise and fall with recharge and pumping.
Step 3: Eliminate the sealed options.
Confined and artesian aquifers sit under a pressure-tight layer, and an aquiclude barely transmits water at all, so none of them show a freely moving water table.
\[ \boxed{\text{Unconfined aquifer}} \]