Changes

Natural or artificial ground catchment and Lined sub-surface tanks

428 bytes added, 20:38, 6 June 2012

→‎Resilience to changes in the environment

'''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.

 

====Drought effects on cement====

 

'''Effects of drought''': Badly made concrete and cracked linings (e.g. in tanks, dams, waterways, wells, and other structures). <br>

'''Underlying causes of effects''': Less water used for curing; Impure water used for mixing. <br>

'''To increase resiliency of WASH system''': Ensure adequate mixing, ratios, purity of ingredients; Minimize water content in mixture; Ensure adequate curing.

More information on managing drought: [[Resilient WASH systems in drought-prone areas]].

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