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The piezometric surface of a confined aquifer is

  • A.the water table of the aquifer overlying it
  • B.the base of the confined aquifer
  • C.the imaginary surface to which its water would rise
  • D.the top surface of the confining bed

Answer: C

Correct answer: the imaginary surface to which its water would rise

The piezometric or potentiometric surface is the level to which water rises in wells tapping a confined aquifer - a surface of hydraulic head rather than a physical water surface, since the aquifer itself is full throughout. It may lie above ground, giving artesian flow, and it is drawn from the levels measured in a network of wells much as a water table is.

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