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[[Image:evap desal icon.png|right|80px]]
[[Image:SolarDistiller.jpg|thumb|right|200px|Gabriele Diamanti's "Eliodomestico" solar-powered eco-distiller. The small, vat-like still is made entirely from terracotta and zinc-plated metal sheets. It is designed to be produced (and eventually repaired) by local craftsmen.]]
[[Image:water pyramid.jpg|thumb|right|200px|The [httphttps://wwwchangemakers.aaws.nlorg/sites/default/files/indexwaterpyramid%20brochure%20mrt%2008.php/products pdf WaterPyramid] is used in tropical remote regions to desalinate saline water and to harvest rainwater. The technology is best used were abundant radiation of the sun and free ground space is available. Photo: Aqua-Aero WaterSystems.]]
__NOTOC__ <small-title />
Desalination is used to remove salts from brackish or saline surface water and groundwater in order to render it acceptable for human consumption or other uses. Brackish water is defined as having a Total Dissolved Solids content of 1,000 mg/l, and saline water as having 10,000 mg/l. It is increasingly employed to provide drinking-water because of a growing scarcity of fresh water driven by population growth, overexploitation of water resources and climate change. Desalination facilities exist all over the world, particularly in the eastern Mediterranean region, with use increasing on all continents. Small-scale desalination is used to supply fresh water on ships and to provide additional fresh water in some hot and arid regions.
===Field experiences===
{|style="border: 2px solid #e0e0e0; width: 7040%; text-align: justify; background-color: #f5f5f5e9f5fd;" cellpadding="2"<!--rsr logo here-->|- style="vertical-align: top" |[[Image:rsr 476akvorsr logo_lite.jpgpng|thumbcenter|none|200px|<font size="2"><center>Project 476</center></font>60px|link=http://rsr.akvo.org/projectproducts/476rsr/]]|'''Akvo RSR Project|[[Image:''' [akvorsr logo_lite.png|center|60px|link=http://rsr.akvo.org/projectproducts/476rsr/ Ensure access to safe water and sanitation]]Salinity, arsenic, lack of proper IWRM, and incidence of natural disasters in the three districts of the Southwest coastal belt of Bangladesh cause a lot of socioeconomic and health related problems. The programme is right<!--project blocks here-based and strengthens knowledge and capacity of community WASH groups as well as local government institutions. As problems are multifaceted, the programme uses a multi-pronged strategy and facilitates partnership with existing institutional stakeholders relevant for WASH sector.>|} {|- style="width: 70%; textvertical-align: justify; background-color: #f5f5f5;bottom" |[[Image:rsr 769476.jpg|thumb|nonecenter|200px140px|<font size="2"><center>[http://rsr.akvo.org/project/476/ RSR Project 769476]<br>Ensure access to safe water and sanitation</center></font>|link=http://rsr.akvo.org/project/769476/]]|'''Akvo RSR Project[[Image:''' rsr 769.jpg|thumb|center|140px|<font size="2"><center>[http://rsr.akvo.org/project/769/ RSR Project 769]<br>Life-WASH]Similar to natural disasters, the project area is severely affected with excessive saline intrusion both in the groundwater and surface water mixed with unacceptable level of iron and arsenic (in the groundwater). The project will directly benefit 3350 households to have a solution regarding the problems of safe drinking water, sanitation and hygiene.</center></font>|} {|stylelink="widthhttp: 70%; text-align: justify; background-color: #f5f5f5;" //rsr.akvo.org/project/769/]] |[[Image:rsr 770.jpg|thumb|nonecenter|200px140px|<font size="2"><center>Project 770</center></font>|link=[http://rsr.akvo.org/project/770/RSR Project 770]]<br>title</center></font>|'''Akvo RSR Project:''' [link=http://rsr.akvo.org/project/770/ Intervention Efforts in WASH]The project is located at Magura Union under Tala Upazila of Satkhira district, covering 14 villages. The project proposed for 2 years and the total population coverage is about 22,000 with the household number at 4,500. The site is in a remote area, socioeconomically backwards with a lack of WASH facilities. The project planned to educate the community and install PSF, Rainwater harvesting, TW & WATSAN.]
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|{{#ev:youtube|c9fepEyGRx8|200|auto|<font size="2"><center>Watercone solar distiller</center></font>}}
|[[Image:solar cucumber.jpg|thumb|right|200px|The [http://www.marineinsightphilpauley.com/marine/marine-news/headline/solar-cucumber-a-unique-water-desalination-plant-at-sea/ .php Solar Cucumber] desalinates sea water and produces drinkable freshwater. As of 2012, the Sea Solar Cucumber is still in the concept phase. Photo: Phil Pauley.]]
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* [http://www.cawst.org/en/resources/pubs/education-materials/category/25-fact-sheets-academic HWTS Factsheet - Solar Distillation].
* ARTICLE: [http://www.nytimes.com/2011/03/22/business/energy-environment/22iht-rbog-technology-22.html?scp=1&sq=New+Technology+Could+Make+Desalination+More+Accessible&st=nyt# New Technology Could Make Desalination More Accessible]. New York Times.
* The [httphttps://wwwchangemakers.aaws.nlorg/sites/default/files/indexwaterpyramid%20brochure%20mrt%2008.php/products pdf Water Pyramid] by Aqua-Aero WaterSystems.
===Acknowledgements===