Rainwater harvesting is a method for collecting and utilizing rainwater to address issues like decreasing groundwater levels due to rapid population growth and urbanization. This technique offers various advantages, including reduced water bills, improved irrigation, and enhanced groundwater levels, while also preventing floods and soil erosion. States like Tamil Nadu and Karnataka have implemented mandatory regulations for rainwater harvesting in buildings to combat water scarcity.

2.  INTRODUCTION
 NEEDS
 METHODS
 ADVANTAGES
 CURRENT STATUS IN INDIA
 CONCLUSION

3. • Rainwater harvesting is a technique used for
collecting, storing and using rainwater for
irrigation and other uses.

4. Decrease in ground
water level
Population is increasing
rapidly
Increase in Urbanization
& Industrialization.
Decrease in surface area
of Lakes, ponds etc.

5. Surface Runoff
Rainwater Harvesting
Roof Top Rainwater
Harvesting

6. Save money on water bill
No water shortage
Suitable for irrigation
Reduces floods &soil
erosion
Improves the level of
ground water

7.  Tamil Nadu was the first state to make
rainwater harvesting compulsory for
every building to avoid groundwater
depletion.
 Karnataka: In Bangalore, adoption of
rainwater harvesting is mandatory for
every owner or the occupier of a building.

8. Rainwater Harvesting Saves Water ,Money
And The Environment