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Water Portal / Rainwater Harvesting / Groundwater recharge / Contour ridges

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[[Image:contour ridges icon.png|right|80px]]

[[Image:ContourRidges.JPG|thumb|right|200px|Contour ridges. Photo: [http://www.flickr.com/photos/makeamark/5983682258/in/photostream/ Make a Mark.]]]

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'''Contour ridges''', sometimes called contour furrows or micro watersheds, are used for crop production. Ridges follow the contour at a spacing of usually 1 to 2 metres. Runoff is collected from the uncultivated strip between ridges and stored in a furrow just above the ridges. Crops are planted on both sides of the furrow.

The yield of runoff from the very short catchment lengths is extremely efficient and when designed and constructed correctly there should be no loss of runoff out of the system. Another advantage is an even crop growth due to the fact that each plant has approximately the same contributing catchment area.

===Manuals, videos and links===

* [http://www.thewaterchannel.tv/images/watersmartagriculture_CGIAR_2015.pdf Water-Smart Agriculture in East Africa], a collaborative effort by [http://www.care.org/ CARE], [http://globalwaterinitiative.org/ GWI], [http://www.iwmi.cgiar.org/ IWMI], and [http://www.cgiar.org/ CGIAR]. A 321-page sourcebook for improving water management for smallholder farmers.

 

* [http://www.fao.org/docrep/U3160E/u3160e07.htm 5.Water Harvesting Techniques.] FAO.

* Large wiki on water use for agriculture: [http://web.archive.org/web/20151025174729/http://agropedia.iitk.ac.in:80/ Agropedia]

===Acknowledgements===

* Rufino, L., [http://www.saiplatform.org/uploads/Modules/Library/SAI%20Technical%20Brief%205%20%20The%20Importance%20of%20Soil%20to%20Water%20Use.pdf Water Conservation Technical Briefs: TB 2 – Rainwater Harvesting and Artificial Recharge to Groundwater]. Sustainable Agriculture Initiative (SAI). August 2009.

* Natural Resources Management and Environment Department, [http://www.fao.org/docrep/U3160E/u3160e07.htm 5.Water Harvesting Techniques.] FAO.

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