Question

what is rain water harvesting ​

Answer 1

Answer:

Rainwater harvesting system, also called rainwater collection system or rainwater catchment system, technology that collects and stores rainwater for human use. Rainwater harvesting systems range from simple rain barrels to more elaborate structures with pumps, tanks, and purification systems.

Explanation:

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Answer 2

Answer:

Rainwater harvesting (RWH) the collection and storage of rain, rather than allowing it to run off. Rainwater is collected from a roof-like surface and redirected to a tank, cistern, deep pit (well, shaft, or borehole), aquifer, or a reservoir with percolation. Dew and fog can also be collected with nets or other tools. Rainwater harvesting differs from stormwater harvesting as the runoff is collected from roofs, rather than creeks, drains, roads, or any other land surfaces.[1][2] Its uses include watering gardens, livestock,[3] irrigation, domestic use with proper treatment, and domestic heating. The harvested water can also be committed to longer-term storage or groundwater recharge.[4]

Rainwater harvesting is one of the simplest and oldest methods of self-supply of water for households, and residential and household -scale projects usually financed by the user.[5] However, larger systems for schools, hospitals, and other facilities can run up costs only able to be financed by companies, organizations, and governmental units.