|Category||Sustainable Development Terms|
|Last Edit By||FIDIC|
|suggestions [at] fidicterms.org|
|Last Edit Date||2018-07-02|
Rainwater Harvesting means :
Rain water harvesting (RWH), in its broadest sense, is a technique used for collecting and storing rainwater for human use from roof tops, land surfaces or rock catchments, which has been in practice for more than 4000 years owing to the temporal and spatial variability of rainfall. Simply stated a water harvesting system collects and stores water within accessible distance of its place of use. The physical and chemical properties of rainwater are usually superior to the sources of ground water that may have been subjected to contamination. Like other water resources, rainwater harvesting is an option to be considered when planning a community oriented water supply system. In some cities ground water extraction has reached very high levels and has brought problems like declining water table, failures of wells/ tube wells and deterioration in ground water quality and quantity. Depending on local environmental conditions, water harvesting may provide a supplementary supply, an alternative supply or the only feasible improved supply, especially in urban areas.
UN-Habitat (undated) Measures for Ensuring Sustainability of Rainwater Harvesting, Policy paper, http://mirror.unhabitat.org/pmss/getElectronicVersion.aspx?nr=2386&alt=1