artesian well


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Related to artesian well: Artesian spring, Artesian basin

artesian well,

deep drilled wellwell,
aperture in the earth's surface through which substances in a natural underground reservoir, such as water, gas, oil, salt, and sulfur, can flow or be pumped to the surface. In the United States, until some years after the Civil War, the majority of wells were "open," i.e.
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 through which water is forced upward under pressure. The water in an artesian well flows from an aquifer, which is a layer of very porous rock or sediment, usually sandstone, capable of holding and transmitting large quantities of water. The geologic conditions necessary for an artesian well are an inclined aquifer sandwiched between impervious rock layers above and below that trap water in it. Water enters the exposed edge of the aquifer at a high elevation and percolates downward through interconnected pore spaces. The water held in these spaces is under pressure because of the weight of water in the portion of the aquifer above it. If a well is drilled from the land surface through the overlying impervious layer into the aquifer, this pressure will cause the water to rise in the well. In areas where the slope of the aquifer is great enough, pressure will drive the water above ground level in a spectacular, permanent fountain. Artesian springs can occur in similar fashion where faults or cracks in the overlying impervious layer allow water to flow upward. Water from an artesian well or spring is usually cold and free of organic contaminants, making it desirable for drinking. In North America, the Dakota sandstone provides aquifers for an artesian system that underlies parts of the Dakotas, Montana, Wyoming, Kansas, Nebraska, and Saskatchewan and supplies great quantities of water to the dry Great Plains region. Many East Coast cities derive their water supplies from aquifers that are exposed along the edge of the Piedmont and dip downward toward the Atlantic coast. The largest artesian system in the world underlies nearly all of E and S Australia. Other important artesian systems serve London, Paris, and E Algeria.

artesian well

[är′tē·zhən ′wel]
(hydrology)
A well in which the water rises above the top of the water-bearing bed.

artesian well

a well sunk through impermeable strata into strata receiving water from an area at a higher altitude than that of the well, so that there is sufficient pressure to force water to flow upwards
References in periodicals archive ?
Artesian wells, which rely on natural pressure to reach water supplies, is located on private property, while deeper wells, drawing on underground sources of water, require a license from the state; the Water Ministry halted the process of filing requests for licenses for these wells several years ago.
He said his agency has capped some artesian wells in some southwestern areas and found water pressure going up.
One of these projects, funded by a US$ 2.5 million grant by the World Bank, aims to withdraw fresh water from artesian wells through solar energy.
Jeddah, Safar 13, 1437, November 25, 2015, SPA -- The Islamic International Relief Organization, an affiliate of Makkah-based Muslim World League (MWL), has spent SR16,387,689 on digging 2598 surface and artesian wells, benefiting 359106 needy persons in remote areas in 13 member countries in Asia and Africa, it was reported here today.
The district health officer in Pampanga, Jose MascuAaAaAeA~an urged Assemblyman Monico Mercado todraft a landmark bill appropriating R100,000 for artesian wells. MascuAaAaAeA~ana was convinced that the dea rate due to cholera could be decreased by 40 per cent, in one year alone,with the use of artesian wells.
He also said rampant violations against artesian wells are unacceptable as the Kingdom suffers acute water shortages.
The Ministry of Irrigation completed 50 new artesian wells, with a cost of EGP 25m as part of the project to reclaim the 1m acres for cultivation, according to Hossam Moghazy, Minister of Water Resources and Irrigation.
Governor Kheir-Eddin al-Sayyed affirmed during the meeting, which took place on Monday, that work is underway to repair old artesian wells and drilling new ones in Idleb city to support the existing water resources and improve the situation of drinking water in it.
Geagea suggested drilling artesian wells in the coastal area, or transferring sea water from the mouths of rivers to pumping stations close to residential communities.
The ERC also completed work on four artesian wells in Arbil in Iraqi Kurdistan, providing clean water to 150,000 people.
Rehabilitation/ replacement of five artesian water wells using a mechanical rig and of another five artesian wells using a caisson including the supply and erection of pumps, motors and switchboards for each well.