Rainwater Harvesting Systems are simple yet effective technologies that collect, store, and utilize rainwater from rooftops, land surfaces, or catchment areas. The collected water is directed into storage tanks, underground reservoirs, or recharge wells for later use.
These systems reduce dependency on conventional water sources, enhance water security during dry seasons, and help replenish aquifers. Depending on design and treatment, harvested rainwater can be used for irrigation, sanitation, washing, or even drinking.
The systems are scalable from household rooftop catchment units to large institutional and community systems. They are particularly useful in water-scarce regions, informal settlements, and places with seasonal rainfall.
Rainwater harvesting is widely promoted by local governments, NGOs, and environmental programs for its low cost, low-tech maintenance, and high replicability. It contributes to sustainable water management and climate adaptation.