What is an artesian well?

• A. A well that freely flows to the surface under its own pressure
• B. A well that requires pumping to extract water
• C. A well located in a floodplain
• D. A shallow well used for irrigation

Answer: (A)

An artesian well is characterized by its ability to flow naturally to the surface due to the inner pressure within an aquifer. This pressure is typically created by a confined aquifer where the water is trapped between layers of impermeable material. When a well is drilled into this aquifer, the internal pressure forces the water up without the need for mechanical pumping, allowing it to reach the surface spontaneously.

This phenomenon can be particularly advantageous, as it provides a constant water source. The water in artesian wells often comes from a significant depth, and because of the pressure, it can flow continuously even when the well is not actively being pumped. This distinguishes artesian wells from other types of wells that require mechanical assistance for drawing water, making the flowing feature a defining characteristic of artesian wells.