Rainwater harvesting is a process of collecting and storing rainwater for future use. It involves the collection of rainwater from rooftops, parks, roads, open grounds, and other surfaces, which is then stored in tanks or other storage systems. The process of rainwater harvesting is a sustainable way to conserve water and is considered one of the best ways to do so.

The main objectives of rainwater harvesting are as follows:

• To meet the increasing demand for water
• To reduce groundwater pollution
• To avoid the flooding of roads
• To reduce soil erosion
• To supplement domestic water needs
• To raise the underground water table
• To reduce the run-off which chokes the drain
• To collect rainwater and use it for domestic purposes during summer

Rainwater harvesting is an effective way to conserve water and can be used for various purposes such as irrigation, washing, cleaning, bathing, cooking, and other livestock requirements. The benefits of rainwater harvesting include less cost, reduced use of groundwater, reduced frequency of flooding, prevention of stormwater pollution, and prevention of water scarcity in the future.