Question:
Which possible combination of aquifers are encountered by deep wells depending on the hydro-geological characteristics of a particular area:
(A) A series of confined aquifers
(B) A series of semi confined aquifers
(C) A combination of confined and semi confined aquifers
(D) A confined aquifer underlain by a series of unconfined aquifers
(E) An unconfined aquifer underlain by a series of semi-confined aquifers
Choose the correct answer from the options given below:
Which possible combination of aquifers are encountered by deep wells depending on the hydro-geological characteristics of a particular area:
(A) A series of confined aquifers
(B) A series of semi confined aquifers
(C) A combination of confined and semi confined aquifers
(D) A confined aquifer underlain by a series of unconfined aquifers
(E) An unconfined aquifer underlain by a series of semi-confined aquifers
Choose the correct answer from the options given below:
(A) A series of confined aquifers
(B) A series of semi confined aquifers
(C) A combination of confined and semi confined aquifers
(D) A confined aquifer underlain by a series of unconfined aquifers
(E) An unconfined aquifer underlain by a series of semi-confined aquifers
Choose the correct answer from the options given below:
Show Hint
To eliminate options quickly:
A confined aquifer cannot sit directly above an unconfined aquifer.
Excluding (D) from the options immediately leads to the correct answer.
A confined aquifer cannot sit directly above an unconfined aquifer.
Excluding (D) from the options immediately leads to the correct answer.
Updated On: Jul 24, 2026
- (A), (B), (C) and (E) only.
- (A), (B), (D) and (E) only.
- (A), (C), (D) and (E) only.
- (B), (C), (D) and (E) only.
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Hydrogeology studies the distribution and movement of groundwater in soil and rocks.
A deep water well can penetrate several different aquifer layers separated by aquitards or aquicludes depending on the local stratigraphy.
Step 2: Detailed Explanation:
Let us analyze the geological feasibility of each aquifer stacking combination:
Combination (A) represents a series of confined aquifers separated by impermeable clay or rock layers.
This is a common configuration in sedimentary basins, making (A) a valid combination.
Combination (B) represents a series of semi-confined (leaky) aquifers separated by semi-pervious aquitards.
This is also common in alluvial plains, making (B) a valid combination.
Combination (C) represents a mix of fully confined and semi-confined aquifers at different depths, making (C) a valid combination.
Combination (E) represents an unconfined (water table) aquifer at the surface, underlain by deeper semi-confined aquifers.
This is the standard geological profile in many regions, making (E) a valid combination.
Combination (D) describes a confined aquifer underlain by unconfined aquifers.
This is physically and hydrogeologically impossible under normal conditions.
By definition, a confined aquifer is under pressure and bounded by confining layers.
An unconfined aquifer must have a water table at atmospheric pressure, meaning it cannot exist beneath a deeper confined, pressurized system.
Therefore, combination (D) is invalid.
Step 3: Final Answer:
The hydrogeologically valid combinations of aquifers are (A), (B), (C), and (E) only.
Hydrogeology studies the distribution and movement of groundwater in soil and rocks.
A deep water well can penetrate several different aquifer layers separated by aquitards or aquicludes depending on the local stratigraphy.
Step 2: Detailed Explanation:
Let us analyze the geological feasibility of each aquifer stacking combination:
Combination (A) represents a series of confined aquifers separated by impermeable clay or rock layers.
This is a common configuration in sedimentary basins, making (A) a valid combination.
Combination (B) represents a series of semi-confined (leaky) aquifers separated by semi-pervious aquitards.
This is also common in alluvial plains, making (B) a valid combination.
Combination (C) represents a mix of fully confined and semi-confined aquifers at different depths, making (C) a valid combination.
Combination (E) represents an unconfined (water table) aquifer at the surface, underlain by deeper semi-confined aquifers.
This is the standard geological profile in many regions, making (E) a valid combination.
Combination (D) describes a confined aquifer underlain by unconfined aquifers.
This is physically and hydrogeologically impossible under normal conditions.
By definition, a confined aquifer is under pressure and bounded by confining layers.
An unconfined aquifer must have a water table at atmospheric pressure, meaning it cannot exist beneath a deeper confined, pressurized system.
Therefore, combination (D) is invalid.
Step 3: Final Answer:
The hydrogeologically valid combinations of aquifers are (A), (B), (C), and (E) only.
Was this answer helpful?
0
0
Top ICAR AIEEA Agricultural Engineering and Technology Questions
- Which of the following farm equipment is not going to be utilized during the wheat production?
- On the farm, during paddy land preparation, if one wheel of tractor gets in mud, which of the following mechanism will be useful to take out the tractor from mud by distributing equal amount of traction at both the rear wheels?
- 20 labors engaged in a farm-operation on paddy farm for 6h. In an ideal conditions, how much maximum energy is utilized by labors into the farm?
(A) 8.94 kWh (B) 120 kWh (C) 12 hPh (D) 240 hPh Choose the correct answer from the options given below: - Which of the following farm operations utilizes the stationary source of power?
(A) Irrigation Water Lifting (B) Winnowing (C) Threshing (D) Harvesting (E) Cultivation (F) Transportation Choose the correct answer from the options given below: - Which of the following methods are employed for the estimation of infiltration characteristics of soil for design of irrigation system?
(A) Use of Infiltrometer (B) Measurement of subsidence of free water in a large basin (C) Estimation of accumulated infiltration from water front advance data Choose the correct answer from the options given below:
View More Questions
Top ICAR AIEEA Ground Water Engineering - Aquifers Questions
- 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. - Consider the statement(s) given below :
(A). The porosity of a material is dependent upon the arrangement of the particles, shape of grains and degree of assortment.
(B). The rhombohedral arrangement gives the maximum porosity.
(C). Transmissivity is expressed as sq. metres per day.
Choose the correct answer from the options given below: - Which of the following statements regarding Hooghoudt's equation are correct?
(A). Gives the relation between the spacing of drains and the height of the water table.
(B). Darcy's law is valid for the flow.
(C). The soil is heterogenous.
Choose the correct answer from the options given below: - 38. The metering mechanism most commonly used for drilling of wheat is
- Match List-I with List-II regarding groundwater aquifers and their properties:
View More Questions
Top ICAR AIEEA Questions
- Which of the following statements is false?
- Which of the following is an example of an inventory?
- According to Adam Smith, productivity gains could be brought about through .
- The supply curve for an artificially scarce good is .
- Which of the following would not be considered an opportunity cost of paid employment?
View More Questions