Rainwater harvesting

"The collection of rainwater from a surface that allows for the rainwater to be stored and used at a later time. In a typical rainwater harvesting situation, rainwater is collected from an impervious surface such as the roof of a building and then stored inside of a tank or cistern. Rainwater can be collected from other surfaces as well. Other surfaces include parking lots, roadways, driveways, and even land surfaces (once surface runoff from the land surface begins). Rainwater can be harvested and stored for many uses including landscape irrigation, potable and nonpotable indoor use, and stormwater management. Harvested rainwater can be particularly useful when no other source of water supply is available, or if the available supply is inadequate or of poor quality." (Innovative Water Solutions, 2019) 

Sources

Innovative Water Solutions. 'What is Rainwater Harvesting?', by Chris Maxwell-Gaines. Accessed March 13, 2019. Available at: https://www.watercache.com/faqs/rainwater-harvesting-defined