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[[Image:ram_hydrolic_pump.jpg|right|80px]]
[[Image:PrincipleHydraulicRam.jpg|thumb|right|200px|Principle of a Hydraulic Ram pump.]]
[[Image:HydraulicRamChildren.jpg|thumb|right|200px|Children standing around a hydraulic ram pump. Photo: [httphttps://www.ashden.org/mediawinners/international_photos/2007 aid-foundation-aidfi AID Foundation, Phillippines.]]]
A hydraulic ram pump is a water pump powered by water with a height difference. In areas where natural flows exist with a height difference of the water over a small distance, hydraulic ram pumps can be used to transport water to higher grounds without using electricity or fuel. The hydraulic ram uses the water hammer effect to develop pressure that allows a portion of the input water that powers the pump to be lifted to a point higher than where the water originally started. Apart from the kinetic energy of the water, no other source of power is needed.
===Field experiences===
[httphttps://wwwhumasolhydramthesis.ashdenawardswordpress.orgcom/winners2015/03/01/case-study-ram-pump-implementation-in-the-philippines/aidfoundation This article] describes the impact the introduction of the hydraulic ram has had in the Philippines.
====Akvo RSR Projects====
The following project(s) utilize a hydraulic ram pump.
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* [http://www2.warwick.ac.uk/fac/sci/eng/research/dtu/pubs/tr/lift/ Several in-depth articles on the function and construction of hydraulic rams, including detailed drawings of a low-cost and tested design. Development Technology Unit (DTU), University of Warwick, UK]
* [http://www.clemson.edu/irrig/Equip/ram.htm Low cost self-made pump], Clemson University.
* [http://www.judyofthewoods.net/diy/ram_pump.html Another low-tech pump design], Judy of the Woods.
* [[Solution_of_the_week_12|Akvo solution of the week 12]]
===Acknowledgements===
* This article is adapted from the Wikipedia article [http://en.wikipedia.org/wiki/Hydraulic_ram Hydraulic Ram]
