Question

Explain how deforestation can lead to depletion of groundwater

Answer 1

Plants help to raise the water level to the highest level. If we remove the plants or trees the rainwater will not be absorbed by the surface because of the absence of the plants the water is not recharged. 
Deforestation causes sunlight to reach the ground directly. It causes the ground to dry up due to the increased hit and evaporation rates. After deforestation, the area becomes barren, rainfall becomes less & lesser & ultimately no rainfall at all. So groundwater gets dry as there is no other source of water

Answer 2

because plants holds the water firmly and charge the groundwater