water well

References

Images

Hoshiarpur, Punjab, India: communal well

Diagram showing three stages of saltwater intrusion into a coastal aquifer: the first panel shows normal conditions with a stable interface between ocean saltwater and fresh groundwater; the second shows increased saltwater intrusion and a cone of depression when groundwater is pumped; the third shows how an injection well restores pressure and blocks saltwater intrusion. Labels identify ocean, aquifer, potentiometric surface, and water flow directions.

water well

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Learn about this topic in these articles:

aquifer
Wells can be drilled into many aquifers, and they are one of the most important sources of fresh water on Earth.
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Wells can be drilled into many aquifers, and they are one of the most important sources of fresh water on Earth.
Read More

water supply system
Developments in supply systems
…springs, the digging of shallow wells was probably the earliest innovation. As the need for water increased and tools were developed, wells were made deeper. Brick-lined wells were built by city dwellers in the Indus River basin as early as 2500 bce, and wells almost 500 metres (more than 1,600…
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…springs, the digging of shallow wells was probably the earliest innovation. As the need for water increased and tools were developed, wells were made deeper. Brick-lined wells were built by city dwellers in the Indus River basin as early as 2500 bce, and wells almost 500 metres (more than 1,600…
Read More
water supply system
Groundwater sources
Wells are constructed in several ways, depending on the depth and nature of the aquifer. Wells used for public water supplies, usually more than 30 metres (100 feet) deep and from 10 to 30 cm (4 to 12 inches) in diameter, must penetrate large aquifers…
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Wells are constructed in several ways, depending on the depth and nature of the aquifer. Wells used for public water supplies, usually more than 30 metres (100 feet) deep and from 10 to 30 cm (4 to 12 inches) in diameter, must penetrate large aquifers…
Read More

construction
Plumbing
…where these are not available, wells that are drilled to underground aquifers which are free of contamination. Water is drawn from the wells with small submersible electric pumps, which are lowered through the well casing to the intake. Underground exterior water-supply pipes are usually cast-iron with threaded connections to contain…
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…where these are not available, wells that are drilled to underground aquifers which are free of contamination. Water is drawn from the wells with small submersible electric pumps, which are lowered through the well casing to the intake. Underground exterior water-supply pipes are usually cast-iron with threaded connections to contain…
Read More