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Riverbed hand-dug wells

16 bytes added, 04:10, 3 October 2013
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[[Image:riverbed hand dug well.png|right|80px]]
[[Image:RiverbedHandDugWell.jpg|thumb|right|200px| Hand-dug wells situated in riverbeds must be equipped with a well-head to prevent the well shaft being filled with sand during floods such as this hydro-dynamic well-head used in Sudan. It is shaped as a wedge to break the force of floods. © E. Nissen-Petersen, Kenya.]]
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