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Class 10 > How do wells in the beach yield good drinking water ?
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How do wells in the beach yield good drinking water ?

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Chemistry Expert

Coastal regions comprising of alluvial deposit are generally rich in groundwater. However fresh groundwater flowing from the mainland towards the sea and saline groundwater tending to flow from the sea towards the mainland form a fresh water -- saline water interface within the underlying formations....
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Coastal regions comprising of alluvial deposit are generally rich in groundwater. However fresh groundwater flowing from the mainland towards the sea and saline groundwater tending to flow from the sea towards the mainland form a fresh water – saline water interface within the underlying formations. The interface is dynamic and remains delicately balanced under the hydrostatic pressure being exerted from both the sides. For this reason, if fresh water is pumped out in large quantity from a coastal aquifer, the fresh water – saline water interface moves inland and saline water tends to encroach upon the space occupied earlier by fresh water. This causes wells that were formerly yielding fresh water to start yielding saline water. Once a part of the fresh water aquifer is contaminated by saline water, it is rather difficult to reverse the situation. read less
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Wells basically contains ground water.
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Layers of natural filtration.
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Physics by Ashwani Sir

On land, groundwater occurs beneath the surface in what geologists call as Aquifers. Aquifers are geologic formations that can store and transmit water. Note that geologic formations are rock strata that have similar properties (for example rocks of a certain chemical and mineral nature is one such property)....
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On land, groundwater occurs beneath the surface in what geologists call as Aquifers. Aquifers are geologic formations that can store and transmit water. Note that geologic formations are rock strata that have similar properties (for example rocks of a certain chemical and mineral nature is one such property). These have been deposited over millions of years (if you are interested read about stratigraphy, erosion, landforms, geologic time, etc). read less
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I think,Wells which are nearer to the beaches may not have good water because high concentration of chemicals or salts may takes place.how ever the filtration will be done by sand particles.
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