Confined and Unconfined Aquifer with Diagram

What are the types of Aquifers and defined them ?

Aquifers are generally two categories –

1. Unconfined or Non- Artesian Aquifer:-

The top most water bearing stratum having no confined impermeable overburden(acquiclude) lying over it is known as Unconfined or Non-Artesian Aquifer.

The water level in the wells which are constructed in this aquifer will be equal to the level of water table. Such wells are also known as Gravity wells or Water table wells.

 

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2. Confined or Artesian Aquifer:-

When an aquifer is confined on it’s upper and under surface by impervious rock formation then it is called Confined Aquifer.

A well excavated through such an aquifer yields water that often flows out automatically under the hydrostatic pressure is called Flowing Well.

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3.  Perched Aquifer:- It is a special case in which the water table rises above the ground water table is called Perched Aquifer. It’s found in unconfined Aquifer.

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