The stone floor, mop up the water that is under pressure or rock layer caused by detention, texture paste cover both above and below, from which the effect of more than one atmosphere pressure. The water level in the pond that appears at the stone floor, mop up penetrate through the water under pressure to a higher level, this part is saturated with water, the water always puts the rock layer on independent. Horizontal or level, assuming that the same pressures show called pressure level (Piezometric Surface). In doing so,
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