Captive tablecloth
A tablecloth captivates is a tablecloth generally deep and located between two impermeable layers. It communicated not with surface and it is entirely saturated with water under pressure.
In certain cases, this pressure is sufficient to make go up water until on the surface in the event of Forage, which means that one obtains a puit able to provide water without pumping; it is what is called a Artesian well.
Not communicating with surface, these tablecloths are reloaded with difficulty. They represent a particular water resource, less important on the long run than the ground water, but also often better protected from the pollutions.Deserted S, these tablecloths are said fossil because they are not fed and are a tank épuisable." Fossil tablecloth does not want to say tablecloth captivates it seems to me, only that its rate of recharging is very weak-->
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