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— नदी या झील के पानी का प्रदूषित हो जाना.
===Manualsनिर्देशिका, videos, and linksवीडियो और लिंक===* [ftp://ftp.fao.org/fi/CDrom/FAO_Training/FAO_Training/General/x6708e/x6708e07.htm Main water intake structuresमुख्य जल ग्रहण संरचनाएं.] FAOएफएओ.
* [http://www.irc.nl/page/1917 Surface water intake and small damsसतही जलग्रहण और छोटे बांध]. Chapter अध्याय 11. Revised by Nhamo Masanganiseन्हामो मसांगनाइज द्वारा संशोधित.
===Acknowledgements===
* Brikke, François, and Bredero, Maarten. [http://www.washdoc.info/docsearch/title/117705 Linking technology choice with operation and maintenance in the context of community water supply and sanitation: A reference document for planners and project staff] or ([http://www.who.int/water_sanitation_health/hygiene/om/wsh9241562153/en/ alternative link]). World Health Organization and IRC Water and Sanitation Centre. Geneva, Switzerland 2003.
* CARE Nederland, Desk Study: [[Resilient WASH systems in drought-prone areas]]. October 2010.