Anatomy of an artesian well |
There's a one-word answer to the original question: "groundwater." Lebednik actually gets that word right; it's her "explanation" of groundwater, explanation demanded by the DMS minimum word count, that proves sadly lacking. According to Christine,
"Well water comes from sources beneath the Earth's surface known as groundwater, which includes porous water-bearing formations as well as underground springs... Some springs run entirely underground and do not break through the surface..."
We're still trying to figure out what these "underground springs" are, since – according to people who know what springs are – springs are "the result of an aquifer being filled to the point that the water overflows onto the land surface [bolding ours]." Yeah: a surface feature, which by definition can't be "underground." Maybe an "underground spring" is in a cave? Whatever the case, Lebednik has plenty of other problems with her topic, one of which is that she thinks only private residences use wells:"Unlike municipal water supplied to homes through municipal water pipes that comes from surface water sources like reservoirs, lakes or rivers, well water draws from the sources of water beneath the Earth's surface."Ummm, no: most municipalities use well water for at least part of their water supply! Besides this misconception (and the sloppy writing), Lebednik can't quite get a handle on the concept of an aquifer: |
"Groundwater also includes water that is contained in a variety of porous materials that lie beneath the Earth's surface, such as silt, gravel, clay and sand. Water collects below ground in these porous materials into structures called aquifers. Generally speaking, well water collects into the well from these water-bearing structures. Wells are situated in the Earth to access the aquifer at a depth well below the surface."In our staff hydrologist's opinion, that's a piss-poor description of an aquifer; which, by the way, is not a "structure": it's a layer. And Chris? Aquifers with significant clay aren't particularly good aquifers... As for "well below the surface," that depends on your definition of "well." Some hand-dug water wells are less than ten feet deep; some drilled wells reach several hundred.
Christine also has some difficulty with the concept of artesian wells...
"With an artesian well, the water naturally rises up into the well because of the action of pressurizing forces below the Earth. With all other types of water well, collecting the water into the well requires some sort of pumping action. The pumping device used to drive water to the well can be either mechanical or electrical."The hydrologist thinks the phrase "pressurizing forces below the Earth" sucks big time -- first, because it's lousy grammar; second, because where the heck is "below the Earth"; and third, because if you're going to mention these "pressurizing forces" you need to explain them! Then there's that "pumping device" that "drive[s] water to the well": can't she just call it a pump? Sure she can! and pumps don't drive water to a well, they draw water to a well...
¹ Leaf Group sent Lebednik's post to their cleanup team, but you can still read her original text using the Wayback machine at archive.org. Its URL was ehow.com/about_5569109_water-well-come.html
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SI - HYDROLOGY
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