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Riverbed hand-dug wells

175 bytes added, 03:20, 17 July 2012

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# In areas where there are no high banks and where maximum floodwater height is lower than these banks – this is so that suction pumps can still operate (effectively will abstract water between 6 – 7 metres height).

 {{procontable | proborder="1" cellpadding="5" cellspacing="0" align="center"|-! width="50%" style="background:#efefef;" | Advantages! style="background:#ffdead;" | Disadvantages|-| valign="top" | - Taps water in riverbed rather than through riverbanks (if very defined aquifer where water is confined to riverbed) <br>

- Lower cost than making a lined well in the riverbank due to less lining needed <br>

- Speedier construction and lower cost compared to fully lined well <br>

- Safer to construct due to fewer hazards compared to deeper wells.<br>

| convalign= "top" | - Contamination possibility of water due to limited filtration depth between surface water to intake. <br>

- Can be difficult to sink to required depth especially in areas of flowing sand.

|}} 

==Resilience to changes in the environment==

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