a paragraph on tubewells and wells (long)
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A tube well is a type of water well in which a long, 100–200 millimetres (3.9–7.9 in)-wide, stainless steel tube or pipe is bored into an underground aquifer. The lower end is fitted with a strainer, and a pump lifts water for irrigation. The required depth of the well depends on the depth of the water table.
A tube well used for irrigating wheat in India in 1968.
Borehole of a tube well, which is usually 30 metres (98 ft) deep or more.
Outlet of a tube well to a temporary reservoir.
Diagram of a tube well.
Temporary reservoir
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