The type of wells in which water rises above the level of ground water is
**Core Concept**
Artesian wells are a type of well that taps into a confined aquifer under pressure, causing water to rise above the ground level. This phenomenon occurs due to the pressure exerted by the overlying layers of rock and soil.
**Why the Correct Answer is Right**
The artesian pressure is generated by the weight of the overlying rock and soil layers, which compress the water in the aquifer. This compression results in an increase in the water's potential energy, causing it to rise through the well casing when the seal is breached. The artesian pressure is typically higher than the atmospheric pressure, allowing the water to flow freely from the well.
**Why Each Wrong Option is Incorrect**
**Option A:** Perched water table wells are not under pressure from an aquifer, but rather from a localized water table, and do not exhibit the same characteristics as artesian wells.
**Option B:** Monitoring wells are typically used for groundwater sampling and monitoring, and are not designed to tap into a pressurized aquifer.
**Option C:** Boreholes can be used to access groundwater, but they do not necessarily tap into a pressurized aquifer, and are not a specific type of well.
**Clinical Pearl / High-Yield Fact**
Artesian wells can be identified by the presence of water flowing freely from the well, even when the well is not being pumped. This is a key characteristic that distinguishes artesian wells from other types of wells.
**Correct Answer: C. Artesian wells. Artesian wells are a type of well that taps into a confined aquifer under pressure, causing water to rise above the ground level.**