Changes

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).

====Potential Problems====