The line joining the static water levels in several wells excavated through a confined aquifer is known as

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BPSC AE Paper 6 (Civil) 11 Nov 2022 Official Paper
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  1. piezometric surface
  2. perched water table
  3. hypsometric curve
  4. cone of depression

Answer (Detailed Solution Below)

Option 1 : piezometric surface
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Concept:

Piezometric surface of the aquifer: 

  • A confined aquifer is also known as an artesian aquifer is confined between two impervious beds such as aquicludes or aquifuges.
  • Confined aquifers are permeable rock units that are usually deeper under the ground than unconfined aquifers. 
  • The water in the confined aquifer will be under pressure and hence the piezometric level which is the surface joining the static water levels will be much higher than the top level of the aquifer.
  • The line joining static water level in several wells, excavated through a confined aquifer is known as the piezometric surface.

5

Water-table surface: 

  • The surface at which pressure head and atmospheric head are equal.

Capillary fringe:

  • It is the layer above the groundwater-surface in which water seeps to some extent due to capillary action.

Cone of depression: 

  • A depressed cone appears when groundwater is pumped out from the well.
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