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Water Portal / Rainwater Harvesting / Groundwater recharge / Sand dam

166 bytes added, 03:50, 30 July 2012

→‎Water extraction

After the dam is built, an outlet for water extraction must be constructed for drinking, agriculture, etc. Hand dug scoop holes are the simplest possibility, however the water can easily be contaminated. Covered shallow wells, either with or without [[Handpumps]] or a [[Rope pump]] protect the water much better. It is also possible to construct an outlet pipe with a tap. In certain designs for sand dams, a pipe is shown that takes water by gravity ''through'' the dam wall. These are said to not work well due to either a blocked intake, a broken tap on outlet side and the possibility of weakening the dam wall. Where water is abstracted directly, risk of contamination increases. In such a case, household water treatment should be advocated (e.g. [[Sodis]]). <br>

[[Image:Sand dam scoop hole.JPG|thumb|right|250px|Women fetching water Groundwater abstraction from the riverbed by means of a local aquifer through scoop hole. Kitui District, Kenya. Source: [http://www.sswm.info/category/implementation-tools/water-sources/hardware/precipitation-harvesting/sand-dams HOOGMOED (2007).]]]

[[Image:Sand dam well.JPG|thumb|right|250px|Men fetching water using a hand pump from a closed well near a sand dam in Kituï, Kenya. Source: [http://www.sswm.info/category/implementation-tools/water-sources/hardware/precipitation-harvesting/sand-dams RAIN (Editor) (n.y.)]]]

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