EARTH SCIENCE
GROUNDWATER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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aquifer blocked by an an impermeable layer of rock.
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aquifer in the upper surface that is able to rise and fall.
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Either A or B
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None of the above
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Detailed explanation-1: -Confined Aquifer: An aquifer which is bounded by two impervious layers at top and bottom of the aquifer is called confined aquifer. The confined aquifer is also known as pressure aquifer. Top and bottom layer of a confined aquifer is generally impervious.
Detailed explanation-2: -Confined aquifers have a layer of impenetrable rock or clay above them, while unconfined aquifers lie below a permeable layer of soil. Many different types of sediments and rocks can form aquifers, including gravel, sandstone, conglomerates, and fractured limestone.
Detailed explanation-3: -Porous/permeable layers are called aquifers; impermeable layers called aquicludes.
Detailed explanation-4: -An aquifer is a body of saturated rock through which water can easily move. Aquifers must be both permeable and porous and include such rock types as sandstone, conglomerate, fractured limestone and unconsolidated sand and gravel.
Detailed explanation-5: -A confined aquifer is an aquifer below the land surface that is saturated with water. Layers of impermeable material are both above and below the aquifer, causing it to be under pressure so that when the aquifer is penetrated by a well, the water will rise above the top of the aquifer.