Question

a city worker is trying to dig to reach the water table. she knows the unsaturated zone in the area is four feet thick and the saturated zone is another five feet thick before an impermeable granite layer is reached.

how deep will she have to dig to reach the water table?

○ two feet
○ four feet
○ five feet
○ nine feet

Explanation:

Step1: Identify relevant layer

The water table sits at the bottom of the unsaturated zone, so only the thickness of this zone matters for reaching it.

Step2: Match to given value

The unsaturated zone is 4 feet thick.

Answer:

four feet