Confined vs. Unconfined Aquifer

An aquifer is a natural underground layer that holds water. An unconfined aquifer is directly replenished by rain and surface water, allowing water to flow freely in and out. This type is usually shallower and can have water levels that fluctuate with precipitation. In contrast, a confined aquifer is trapped between layers of impermeable rock or clay, which keeps its water under pressure. This means water can sometimes rise to the surface when tapped by a well, often resulting in a higher water table compared to the surrounding area. Both types are crucial for supplying groundwater.