Question

Explain the technique behind rooftop rainwater harvesting. [5 MARKS]

Answer 1

Each step: 1 Mark

The technique involved rooftop rainwater harvesting is as follows:
1. Rainwater is collected at the rooftop.
2. It is allowed to flow into pipes.
3. It is filtered through a wire mesh.
4. It is allowed to pour into an underground tank setup to store rainwater. These tanks contain layers of sand, gravel, charcoal that will filter the dirt and other impurities from rainwater.
5. This water seeps back into ground slowly to increase the level of ground water table.