Civil Engineering (CE) Exam > Civil Engineering (CE) Questions > Pick up the correct statement:a)Water bearin...
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Pick up the correct statement:
- a)Water bearing clay formation yield more than gravel formations.
- b)The water levels in confined aquifers equals the water table level.
- c)Confined aquifers are also known as artisan wells.
- d)Infiltration wells are deep wells constructed along river bank.
Correct answer is option 'C'. Can you explain this answer?
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Pick up the correct statement:a)Water bearing clay formation yield mo...
An artesian aquifer is a confined aquifer containing groundwater under positive pressure. An artesian aquifer has trapped water, surrounded by layers of impermeable rock or clay which apply positive pressure to the water contained within the aquifer.
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Pick up the correct statement:a)Water bearing clay formation yield mo...
The correct statement is option 'C': Confined aquifers are also known as artisan wells.
Explanation:
- An aquifer is a geological formation that contains and transmits groundwater in sufficient quantities to be used as a source of water supply. It is an underground layer of permeable rock, sand, or gravel through which groundwater can flow.
- Aquifers can be classified into two main types: unconfined aquifers and confined aquifers.
Unconfined Aquifers:
- Unconfined aquifers are also known as water table aquifers or phreatic aquifers.
- They are not bound or confined by impermeable layers above them and are typically found near the surface.
- The water table represents the upper surface of the unconfined aquifer and fluctuates depending on factors such as precipitation and extraction rates.
- Wells drilled into unconfined aquifers are called shallow wells, and they usually do not require pumping to access the groundwater.
Confined Aquifers:
- Confined aquifers, on the other hand, are also known as artesian aquifers or artesian wells.
- They are bounded by relatively impermeable layers above and below them, forming a confined space where the groundwater is under pressure.
- The water in confined aquifers is usually under sufficient pressure to rise above the level of the aquifer when tapped by a well, resulting in a flowing well without the need for pumping.
- This natural pressure is due to the recharge areas of the aquifer being at higher elevations, causing gravity to drive the flow of groundwater.
- Confined aquifers are often deeper than unconfined aquifers and can contain large amounts of water.
Conclusion:
- Option 'C' is the correct statement because confined aquifers are indeed known as artisan wells or artesian aquifers.
- The term "artisan" comes from the French word "artésien," referring to the town of Artois in France, where the first flowing artesian well was drilled and named after the region.
- These wells were initially drilled into confined aquifers, and the term "artisan" has since been used to describe any flowing well that taps into a confined aquifer.
Explanation:
- An aquifer is a geological formation that contains and transmits groundwater in sufficient quantities to be used as a source of water supply. It is an underground layer of permeable rock, sand, or gravel through which groundwater can flow.
- Aquifers can be classified into two main types: unconfined aquifers and confined aquifers.
Unconfined Aquifers:
- Unconfined aquifers are also known as water table aquifers or phreatic aquifers.
- They are not bound or confined by impermeable layers above them and are typically found near the surface.
- The water table represents the upper surface of the unconfined aquifer and fluctuates depending on factors such as precipitation and extraction rates.
- Wells drilled into unconfined aquifers are called shallow wells, and they usually do not require pumping to access the groundwater.
Confined Aquifers:
- Confined aquifers, on the other hand, are also known as artesian aquifers or artesian wells.
- They are bounded by relatively impermeable layers above and below them, forming a confined space where the groundwater is under pressure.
- The water in confined aquifers is usually under sufficient pressure to rise above the level of the aquifer when tapped by a well, resulting in a flowing well without the need for pumping.
- This natural pressure is due to the recharge areas of the aquifer being at higher elevations, causing gravity to drive the flow of groundwater.
- Confined aquifers are often deeper than unconfined aquifers and can contain large amounts of water.
Conclusion:
- Option 'C' is the correct statement because confined aquifers are indeed known as artisan wells or artesian aquifers.
- The term "artisan" comes from the French word "artésien," referring to the town of Artois in France, where the first flowing artesian well was drilled and named after the region.
- These wells were initially drilled into confined aquifers, and the term "artisan" has since been used to describe any flowing well that taps into a confined aquifer.
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Pick up the correct statement:a)Water bearing clay formation yield more than gravel formations.b)The water levels in confined aquifers equals the water table level.c)Confined aquifers are also known as artisan wells.d)Infiltration wells are deep wells constructed along river bank.Correct answer is option 'C'. Can you explain this answer?
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Solutions for Pick up the correct statement:a)Water bearing clay formation yield more than gravel formations.b)The water levels in confined aquifers equals the water table level.c)Confined aquifers are also known as artisan wells.d)Infiltration wells are deep wells constructed along river bank.Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Civil Engineering (CE).
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