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If such a confined aquifer is tapped by a well, water 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.
Restated, flow system B3 degrades the water quality of the artesian well. such that the pH drops and conductance rises; the well 'becomes dominantly. acidic where almost no acidity was present in the lower zones; a significant rise. in both concentrations and loadings of sulphates, total iron, ferrous iron, and.