Unconfined Aquifer

Unconfined Aquifer: In the hydrogeology branch of geology, an unconfined aquifer is an aquifer that has a water table. In fact, an unconfined aquifer can only be the uppermost hydrogeologic unit and is particularly one that has no hydraulic head (or pressure) that is equal to atmospheric pressure. To illustrate, depth to groundwater in a groundwater monitoring well that is screened within an unconfined aquifer, will have the same elevation inside the well casing, of the water table itself. Dissimalry, monitoring well elevations of a confined aquifer are different from the aquifer’s elevation, are a representation of its hydraulic-head (or pressure).

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