Diagram 1-2 Stakeholder workflow
1.5 WASH considerations 1.5.1
Water access & treatment
The rare phenomenon of saltwater intrusion has caused the loss of over 10,000 hectares of arable land and the contamination of aquifers which are the source of approximately 60% of infections and illnesses. Obviously, a safe, obtainable and affordable water access is crucial to the success of the project. Considering these requirements and local context, two solutions will be provided for this project. The first one is a rainwater harvest system (figure 1-4). The municipality has an average annual rainfall of 1,095.7 mm spread between June and October, which provides a great opportunity for the use of the rainwater tank. The rainwater harvest system is made up by a water tank and a sand bed filter. The water tank collects the rainwater running through the down pipe from the bamboo gutter and generates it to the filter to do the purification. Then the filtered water would be able for drinking, handwashing and landscape use. If the filter side is full then the clean water would flow to the bottom layer of the water tank to be saved safely. If the water tank is full, the extra rainwater will be exhausted outside of the system through the overflow rainwater pipe.
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