An aquifer bound by one or two aquitards is called as i. semi-confined aquifer ii. leaky aquifer iii. aquifuge
- AOnly (i)
- BOnly (i) and (ii)Correct
- COnly (ii) and (iii)
- D(i), (ii) and (iii)
Solution
Concept
Classification of semi-confined aquifers
Formula
NONE
Step-by-step solution
1. Aquifers bounded above or below by semi-pervious layers (aquitards) permit vertical leakage. Answer: B
Explanation
An aquifer bounded above or below by aquitards—semi-pervious layers that allow slow vertical leakage—is known as a semi-confined or leaky aquifer. An aquifuge, by contrast, is an impermeable formation that neither contains nor transmits water. Therefore, terms i and ii are correct, making option B the right answer.
Why the other options are wrong
A) Terms (ii) and (iii) are also valid descriptions for an aquifer bound by aquitards. C) Term (i) is missing from this option choice.
Shortcut
An aquifer bounded by semi-pervious aquitards is both a semi-confined aquifer and a leaky aquifer.
Common mistake
Selecting option D by mistakenly including aquifuge, which is an impermeable formation that neither absorbs nor transmits water.
Correct answer: B) Only (i) and (ii)