aquifer

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aquifer

a reservoir of ground water found in underground rock, sand and gravel layers.
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Because exploitation of the unconfined groundwater is scattered and intermittent, the groundwater flow field remains an approximately natural flow regime with the water table above the mean sea level (Figure 3(a)).
On the basis of the results of the solution to the hydrogeological model developed at the Geological Survey of Estonia, and also Department of Mining TTU it was found that the inflow from closed flooded mines to the Viru mine amounts to 26 000 [m.sup.3] a day or 45% of the total inflow, and the inflow of unconfined groundwater makes up 55% (Table 1).
Unconfined groundwater is continuous under the landscape and is typically the type of groundwater system used for drinking and irrigation water.