In many areas with karst terrain,people use sinkholes as places to dump garbage.What effect might this practice have on the groundwater supply?
A)None;sinkholes are not connected to groundwater sources.
B)It clogs the sinkholes so that water cannot percolate into the groundwater.
C)It could block the groundwater discharge from unconfined aquifers only.
D)It could contaminate the groundwater in any or all aquifers in the area.

Question

Quizplus · Accepted Answer

Sinkholes are generally formed by the dissolution of limestone or other soluble rocks by groundwater. Therefore, sinkholes are directly connected to the groundwater system. Any garbage dumped in sinkholes will eventually leach into the groundwater, contaminating it. This contamination can affect all the aquifers in the area, not just the unconfined ones. Therefore, the practice of using sinkholes as places to dump garbage can have a severe impact on the groundwater supply.

In Many Areas with Karst Terrain,people Use Sinkholes as Places