Question

What is a confined aquifer and an unconfined aquifer?

Answer 1

unconfined aquifer are those where water is absorb directly from ground surface. confined aquifer are those which contains small stones etc with through aquifer.

Answer 2

Aquifers: confined and unconfined aquifers.

Explanation:

• Permeable rock formations which store groundwater and transmit sufficient quantity of it into a pumping well is known as an aquifer.  

• Aquifers are divided into two groups.

    1.  Unconfined aquifer

    2.  Confined aquifer  

• Unconfined Aquifer :  

 The aquifers in which groundwater occurs under atmospheric pressure are called "unconfined aquifers". If a well is drilled in an unconfined aquifer, the water level in it will represent the water table.

• Confined Aquifer :  

 A confined aquifer is that in which aquiclude ( Impermeable zone ) lie above and below it. The aquiclude restrict the movement of groundwater and as a result in the confined aquifer, the groundwater mover under pressure. If a well is drilled here, the water will readily flow out of this well without a pump. Such wells are known as " artesian wells ".