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The technique combines raised beds with irrigation channels to prevent damage by soil erosion during floods. The technique ensures both collecting of water (either fluvial water, rainwater or phreatic water) and subsequent drainage. The drainage aspect makes it particularly interesting for many areas subjected to risks of brutal floods, such as tropical parts of Bolivia and Peru where it emerged. Waru waru has been used in many countries, like China.
- Nivedita Khandekar; Geoffrey Kamadi; Dan Collyns (19 August 2015). "The three wonders of the ancient world solving modern water problems In Peru, Kenya and India, NGOs are helping communities overcome water scarcity using wisdom from the past". The Guardian. Retrieved 19 August 2015.
- "Raised beds and waru waru cultivation". Organization of American States, Department of Sustainable Development. Retrieved 2008-03-06.
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