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Taanka
Tanka is a traditional rainwater harvesting technique, common to the Thar desert region of Rajasthan, India.〔''Rainwater harvesting in rural India - taankas in the Thar Desert'', by Megan Konar, Waterlines, Volume 25, Number 4, April 2007 ,'' pp. 22-24(3).'' Publisher: Practical Action Publishing.〕 It is meant to provide drinking water for a single or a small group of families and is an important element of water security in these arid regions. A ''Taanka'' is a cylindrical underground rainwater storage cistern usually 10’ x 10’ in size, wherein rainwater from rooftops, a courtyard or natural or artificially prepared catchment flows into the paved underground pit, through filtered inlets made on the external wall of the structure, where it is stored and can be used by one family during the dry season. Once fully filled, the water is sufficient for a family of 5-6 members for a period of 5–6 months, and saves it from everyday-water-fetching-drudgery.〔(Rainwater Harvesting Structures: 1: Taanka ) ''Indian Villages 2020 (in 2 Volumes)vision And Mission (vol. 1)strategies And Suggested Development Models (vol 2), Y.P. Singh (ed.). Concept Publishing Company, 2006. ISBN
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