Chapter 28, Problem 4TE

To determine

The height of water can rise in a well that is not pumped in an unconfined aquifer.

Answer to Problem 4TE

In an unconfined aquifer, the water level in a well will rise up to the water table that is not pumped.

Explanation of Solution

If the water in a well in an unconfined aquifer is not pumped, then the water will rise up to the water table in that place. Pumping in the well in an unconfined aquifer will create the water level to lower down, and when pumping is stopped, the water in the well slowly fills up. This gradual filling up of water is due to the porous layers surrounding the unconfined aquifer.

In a confined aquifer, the soil above the aquifer has a low permeability. So when the ground soaks water, it cannot flow into the aquifer. The aquifer is considered to be layers of sedimentary deposits. Water recharge at the unconfined aquifer at higher elevation using these layers will rise up to the level of the water table level.

Conclusion:

Therefore, in an unconfined aquifer, the water level in a well will rise up to the water table that is not pumped.