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Subsurface harvesting systems

621 bytes added, 00:04, 21 April 2012

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==Suitable conditions==

{Climate_change

|heading1=Drought

|text1= - ''Effects of drought'': Can dry up; Water yields low. <br> - ''Underlying causes of effects'': Less recharge of aquifer due to less rainfall; Increasing population & water demand; Size of aquifers – e.g. limited sand volume; Too much silt accumulates behind dam; Wells not sunk deep enough into water table; Incorrect siting causes leaking dams. <br> - ''To increase resiliency of WASH system'': Competent siting & construction; Build sand dam in stages to reduce silt; Soil & water conservation techniques in upper part of catchment; Dig abstraction wells/pipes deeper.}}

 

* Siting requirements are similar to the [[sand dam]].<br>

* Subsurface dams should be built where sand volume is already sufficient to store water.<br>

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