Step 2 – What should be the RWH strategy for your layout Another factor to consider when determining the best RWH interventions for your context is your layout’s land use pattern. In a typical urban residential layout, land use is usually as follows: approximately 60% is rooftops, 20% is roads and the rest is open-areas like parks, playgrounds, footpaths, transformer yards or drains. This means that the largest amount of rain is falling on rooftops. Rooftops are also clean and so rainwater running off of them is clean. It is prudent to try and capture this at the household level…
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