Water management: rainwater harvesting and traditional water bodies sheet4-mark answer frameWhat is rainwater harvesting? Explain rooftop rainwater harvesting with a diagram.
How to lay out the answer. Follow the frame, then write it in your own words.
- 1 · Define. Rainwater harvesting is collecting and storing rainwater for use or to recharge groundwater.
- 2 · Parts and working.
- Catchment: the roof
- Gutters and a down pipe
- Filter: pebbles, gravel, sand
- Storage tank or recharge pit
- 3 · Draw the system. House, gutter, pipe, filter, tank and recharge pit, all labelled.
- 4 · Advantages. Raises the water table, reduces street flooding and gives water in summer.
- 5 · Link to daily life. Chennai homes revived rooftop harvesting after the 2019 water shortage.
- 6 · Close in one line. Every roof can become a small water source.
Scoring tip: A neat labelled diagram carries half the marks. Label the filter layers.
