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Water Portal / Rainwater Harvesting / Groundwater recharge / Controlled flooding and Spreading basins

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→‎Manuals, operations and maintenance

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__NOTOC__

[[Image:controlled flooding icon.png|right|80px]]

[[Image:ControlledFlooding.jpg|thumb|right|200px|Groundwater recharge in spreading basins. Arizona, USA. Photo: CAP (2002)]]

This is a floodwater harvesting technique called '''controlled flooding''', where the water diverted from a river, with the help of diversion structures and canals, is spread evenly over a large surface area , known as '''spreading basins''', where it is used for recharging groundwater, irrigation, filling ponds, and watering grazing land. The concept is that a thin sheet of water flows over the land but at minimum velocity in order to avoid disturbing the soil cover. This includes [[Irrigation_-_Spate_irrigation|spate irrigation]], but also standard channel irrigation which takes river water via channels to fields.

===Suitable conditions===

===Manuals, operations and maintenance===

* [http://web.archive.org/web/20151106164515/https://www.iaea.org/technicalcooperation/documents/Brochures/sust-groundwater.pdf Sustainable Development of Groundwater Resources in Southern and Eastern Africa]. International Atomic Energy Agency.

===Acknowledgements===

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