In a water table well, the cone of depression describes a ______ area around the well.

In a water table well, the cone of depression describes a ______ area around the well.

• A. Dewatered
• B. Saturated
• C. Undisturbed
• D. Arid

Answer: (A)

When a well is pumped, the hydraulic head in the surrounding aquifer drops, causing the water table to fall toward the well. This creates a cone-shaped depression in the groundwater surface—the cone of depression. The area inside that cone is described as dewatered because groundwater levels have been lowered relative to their undisturbed state due to pumping. The other terms don’t capture this effect: arid isn’t about the presence of groundwater being lowered by pumping, undisturbed would mean no pumping impact, and simply labeling the area as saturated doesn’t convey the lowering of the water table that defines the cone of depression.

When a well is pumped, the hydraulic head in the surrounding aquifer drops, causing the water table to fall toward the well. This creates a cone-shaped depression in the groundwater surface—the cone of depression. The area inside that cone is described as dewatered because groundwater levels have been lowered relative to their undisturbed state due to pumping. The other terms don’t capture this effect: arid isn’t about the presence of groundwater being lowered by pumping, undisturbed would mean no pumping impact, and simply labeling the area as saturated doesn’t convey the lowering of the water table that defines the cone of depression.