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    See Great Artesian Basin for the water source in Australia.


    An artesian aquifer is a confined aquifer containing groundwater that will flow upwards out of a well without the need for pumping.


        Artesian aquifer
            Why is a well artesian?
            Origin
            See also
            Notes

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    Why is a well artesian?







    In recharging aquifers, this happens because the water table at its recharge zone is at a higher elevation than the head of the well.

    Pascal's law predicts the theoretical hydrostatic pressure P:

    P =

    ho cdot g cdot (z_mathrm-z_mathrm)

    where
    ho (rho) is the density of the fluid, g the acceleration due to gravity, and z is the elevation. In practical terms the pressure is expressed as metres water column (zr − zw).

    "Fossil water" aquifers can also be artesian if they are under sufficient pressure from the surrounding rocks. This is similar to how many newly tapped oil wells are pressurized.


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    Origin
    Artesian wells were named after the former province of Artois in France, where many artesian wells were drilled by Carthusian monks since 1126 The technique was also known much earlier in Syria and Egypt
    , although whether the monks of Artois learned of it from outside sources, or discovered it independently, is unknown.

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    See also

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    Notes





     
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    Scientus.org Dictionary (Yet Another Wiki) RC : 1.39
    This article is licensed under the GNU Free Documentation License [copyleft]. It uses material from the Wikipedia article "Artesian aquifer". link