Aquifers Flashcards
A confined aquifer is sandwiched between
Two layers of impermeable rock. Water is trapped under high pressure.
Aquifers are layers of rock that are
Porous and permeable to store water and let it pass through easily.
The potentiometric surface is the
Level the water rises to.
In a confined aquifer, if a borehole is drilled in the aquifer,
The water will rise up until the weight of the water column balances the pressure in the aquifer.
In a confined aquifer, water can be released or stored as a result of
Compression of artesian water (the water in a confined aquifer) and the aquifer skeleton.
In an unconfined aquifer, water storage is
Mainly provided by pore space.
The amount of water that can be released from an unconfined aquifer is
Determined by the specific yield.
An unconfined aquifer is underlain by impermeable rock, above this layer,
Rock is permeable and rain soaks down to recharge the aquifer.
An unconfined aquifer fills up until
The water reaches the land surface and flows out as a spring.
