Changes

Natural or artificial ground catchment and Lined sub-surface tanks

866 bytes added, 22:02, 20 April 2012

→‎Suitable conditions

==Suitable conditions==

{{Climate_change

|heading1=Drought resilience

|text1= - ''Effects of drought'': Water storage used up. <br> - ''Underlying causes of effects'': Lack of rainfall; High evaporation rates; Leaking linings due to bad construction; Storage not sufficient for demand – tanks are too expensive for volumes of water to outlast extended dry periods. <br> - ''To increase resiliency of WASH system'': Build smaller tank structures but more of them over longer time, which means less reinforcement per tank, more manageable to construct and cover, and more affordable; Reduce evaporation & seepage due to poor construction & siting; Follow proper concreting guidelines; Make tanks from cheaper materials and repair more often; Improve access to micro-finance; Support the capacity of the government or private sector to be able to provide (for payment) a tankering scheme.}}

* Site in a place where run-off is seen to flow after rains.

* Artificial catchments are created where infiltration of runoff zone is high.

* Do not site tanks where heavy vehicles will pass close to tank wall.

* Do not site sub-surface tanks in areas of high water tables to reduce risk of flotation.

{{procontable | pro=

Winona

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