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Water Portal / Rainwater Harvesting / Surface water / Catchment and storage dams

85 bytes removed, 03:31, 17 January 2013

→‎Operations and maintenance

Once a year, the reservoir may be left to dry out for a short period to reduce the danger of bilharzia (a human disease caused by parasitic worms called Schistosomes). The reservoir, silt traps, gutters, etc., must be de-silted at least once a year. To control mosquito breeding and the spread of malaria, Tilapia fish can be introduced in the reservoir (every year if it runs dry).

 [[File:Roles - Catchment and storage dams.jpg|thumb|center|800px|Chart: WHO]]<br>[[File:OandM - Catchment and storage dams.jpg|thumb|centernone|800px600px|Chart: WHO]]

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