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Water Portal / Rainwater Harvesting / Groundwater recharge / Check dams (gully plugs)

20 bytes removed, 00:27, 2 December 2016

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[[Image:check dams (gully plugs) icon.png|right|80px]]

[[Image:check dam india.jpg|thumb|right|200px|Check Dam for Rainwater Conservation. NMDC Diamond Mine, Panna, Madhya Pradesh. Photo: [http://www.retailforsuregreenfieldeco.com/www/photogallery.php Greenfield Eco Solutions Pvt. Ltd.]]]

A '''check dam''' is a small, temporary or permanent dam constructed across a drainage ditch, gully, swale, or channel to lower the speed of concentrated flows (like an overflow weir) for a certain design range of storm events. They may be more categorized as a type of floodwater rather than a runoff harvesting technique. A check dam can be built from logs of wood, stone, pea gravel-filled sandbags or bricks and cement. They have been used widely in Kenya and India. These dams can also be made as [[Water Portal / Rainwater Harvesting / Groundwater recharge / Leaky dams | leaky dams]]. Dams that have been built in riverbeds with no coarse sand transport ([[Water Portal / Rainwater Harvesting / Groundwater recharge / Sand dam |Sand dam]]s) may end up being used in this way. These structures are relatively cheap and can last about 2-5 years.

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