Changes

Riverbed hand-dug wells

576 bytes added, 00:30, 12 April 2012

→‎Suitable conditions

# Within 30 metres of the pump location.

# 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 | pro=

- 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>

| con=

- 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.

}}

==Construction, operations and maintenance==

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