Water harvesting is a method of holding rainwater on the surface of the earth, to make it collected under the ground, so as to renew groundwater.
The two advantages of water harvesting:
(a) Giving people control over there local water resources to ensure that overexploitation of water resources will be reduced.
(b) The water stored in the ground provide moisture for the growth of the vegetation over a wide area and is protected from human contamination.