Which would be the most prone to surface contamination from runoff and infiltration?

Question

Quizplus · Accepted Answer

Shallow aquifers with thin soils or unconsolidated coarse overburden are most prone to surface contamination from runoff and infiltration because there is little to no barrier between the surface and the aquifer. Contaminants can easily move through the ground into the aquifer. In contrast, the other options have some level of protection from surface contamination. Option A has a thick unsaturated vadose zone, which can filter out contaminants before they reach the water table. Option B has a deep confining layer that prevents contaminants from reaching the aquifer. Option D is in rugged mountainous terrain, which can slow down the movement of contaminants through the ground.

Which Would Be the Most Prone to Surface Contamination from Runoff