What is water harvesting ? List two main advantages associated with water harvesting at the community level. Write two causes for the failure of sustained availability of groundwater.

Explanation

A technique used to collect and store water for future use
Advantages :
Available resource in time of need
Recharging the ground water level
Causes :
Overuse of ground water
Deforestation
Detailed Answer:
Water harvesting is a technique used for collecting, storing and using rainwater for irrigation and other uses. Two main advantages associated with water harvesting at the community level are as follows :
(i) It resolves the problem of water scarcity.
(ii) It helps to recharge the ground water.
Two causes for the failure of sustained availability of ground water are as follows:
(i) Pollution of water caused by human activities and industrial effluents.
(ii) Massive overuse of ground water resulting in water shortage.