Figure 6. Schematic cross sectional diagram showing layered system with an upper unconfined aquifer above a confining unit, and underlain by a confined aquifer. Note the water level in the two wells: In the unconfined aquifer the water level in the well is the same as the height of the water table. In the confined aquifer, the water level is higher than the top of the aquifer – indicating that the aquifer is fully saturated and that the water is under pressure.
Originally uploaded in Integrate:Teaching for Sustainability:InTeGrate Modules:Water Science and Society:Student Materials.

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Source: <a href="">USGS Water Science Photo Gallery</a>
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