Difference between confined and unconfined aquifer.

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Unconfined aquifer	Confined aquifer
In this of aquifers the water table is formed in the upper surface of zone of saturation. So it is called as water table aquifer.	In this type of aquifer the ground water is confined under pressure by the over lying strata than the atmospheric pressure. So it is known as pressure aquifer.
It occurs near the ground surface.	It is generally occurs at significant depth below the ground surface.
Unconfined aquifer have storativities greater than 0.01	Confined aquifers have very low storativity values much less than 0.01
High flow yield.	Low flow yield.
Hydraulic conductivity is medium.	Hydraulic conductivity is low to medium.

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