Question

a farmer is analyzing cross sections of his land to determine where to build a well.

which phrase describes the best area to dig down to the groundwater?

○ where the saturated zone is 15 meters deep
○ where the water table is at 100 meters deep
○ where the unsaturated zone is 50 meters thick
○ where there is a 25-meter thick clay layer at the surface

Explanation:

The saturated zone is where groundwater is found; a shallower saturated zone means less digging is needed to reach groundwater. A 15-meter deep saturated zone is much closer than a 100-meter water table or 50-meter unsaturated zone, and a clay layer at the surface would hinder digging without aiding access to groundwater.

Answer:

A. where the saturated zone is 15 meters deep