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Science Explorer. Multimedia Gallery. Park Passes. Technical Announcements. Employees in the News. Emergency Management. Survey Manual. Artesian water is really not different from other groundwater, except for the fact that it flows to the land surface because pressure in the rocks underground force it to the surface. But, having water flow to the surface naturally is a handy way to tap groundwater resources. Maybe you've heard advertisements by water companies wanting to sell you "artesian-well drinking water.

The water may not be different, but it comes to the earth's surface a bit differently. Groundwater in aquifers between layers of poorly permeable rock, such as clay or shale, may be confined under pressure. If such a confined aquifer is tapped by a wellwater will rise above the top of the aquifer and may even flow from the well onto the land surface. Water confined in this way is said to be under artesian pressure, and the aquifer is called an artesian aquifer. The word artesian comes from the town of Artois in France, the old Roman city of Artesium, where the best known flowing artesian wells were drilled in the Middle Ages.

The level to which water will rise in tightly cased wells in artesian aquifers is called the potentiometric surface. Deep wells drilled into rock to intersect the water table and reaching far below it are often called artesian wells in ordinary conversation, but this is not necessarily a correct use of the term.

Such deep wells may be just like ordinary, shallower wells; great depth alone does not automatically make them Free dating Big Wells chat wells. The word artesian, properly used, refers to situations where the water is confined under pressure below layers of relatively impermeable rock.

The picture to the right shows an artesian well with the potentiometric surface being just above the land surface, but, as the picture above shows, artesian pressure can be very strong! Artesian wells can be sometimes flow to the land surface naturally because of underground pressure.

This diagram shows a conceptual aquifer system having both unconfined and confined aquifers. Generally, the upper layer of an aquifer system is the unconfined aquifer, which does not have a confining layer of solid material above it. The top altitude of this aquifer is called the "water table", below which the ground and rock has all the spaces and voids full of water. Water from this aquifer must be pumped out in a well to get to the land surface. In some locations there can exist confined aquifers below the unconfined aquifers.

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These confined aquifers have layers of solid material above and below them and are thus under pressure from the rock weight. As this diagram shows, for water to recharge these aquifers, it much seep down from the surface at a distance away and travel somewhat horizontally into the confined aquifer. Wells that tap these confined aquifers are "artesian wells". If altitude that the pressurized aquifer pushes water up a well tapping it is the "piezometric level". If this level is below the land surface altitude right side artesian well in the diagram the water will not shoot out of the well at the land surface But if the piezometric level is higher than the well head altitude at the land surface the left side artesian well in the diagramthe water will be pushed upward in the well and emerge at the land surface, with no pump needed.

This kind of well is a flowing artesian well. Do you think you know about groundwater? Want to learn more about artesian water and artesian wells? Groundwater is one of our most valuable resources—even though you probably never see it or even realize it is there. There is water somewhere beneath your feet no matter where on Earth you live.

Groundwater starts as precipitation, just as surface water does, and once water penetrates the ground, it continues moving, sometimes quickly and sometimes very slowly. Eventually groundwater emerges A huge amount of water exists in the ground below your feet, and people all over the world make great use of it. But it is only found in usable quantities in certain places underground — aquifers.

Read on to understand the concepts of aquifers and how water exists in the ground. How much do you know about the water below your feet? Wells are extremely important to all societies. In many places wells provide a reliable and ample supply of water for home uses, irrigation, and industries. Where surface water is scarce, such as Free dating Big Wells chat deserts, people couldn't survive and thrive without groundwater, and people use wells to get at underground water.

Most of us don't have to look for water.

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We grew up either in big cities where there was a public water supply, or in small towns or on farms where the water came from wells. But there are some people to whom finding a new supply of water is vitally important. As the salesmen sang in the musical The Music Man, "You gotta know the territory. Learn as much as possible about the land, the water supply, and the septic system of the house before buying or building. Do not just look at the construction aspects or the beauty of the home and Search Search.

Water Science School. Artesian Water and Artesian Wells. Groundwater Photo Gallery Learn about groundwater through pictures Visit the gallery. Get GW data. Groundwater Information by Topic Learn more. Science Center Objects Overview Related Science Publications Artesian water is really not different from other groundwater, except for the fact that it flows to the land surface because pressure in the rocks underground force it to the surface.

Below are science topics related to artesian wells and groundwater. Date published: October 9, Filter Total Items: 3. Year Select Year Apply Filter. Date published: October 16, Date published: November 8, Date published: June 6, Attribution: Water Resources. Below are publications associated with artesian wells and groundwater.

Year Published: A primer on ground water Most of us don't have to look for water.

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Baldwin, Helene L. View Citation. Filter Total Items: 1. Year Published: Ground water and the rural homeowner As the salesmen sang in the musical The Music Man, "You gotta know the territory. Waller, Roger M.

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