Water is one of the most essential natural resources for life on Earth, yet its availability is becoming scarce due to pollution and wastage. To address this issue, rainwater harvesting and water purification play a crucial role in conserving and utilizing water efficiently.
Our working model demonstrates how rainwater can be collected from rooftops, stored, and then purified using a simple filtration system. This model provides a practical understanding of sustainable water management techniques that can be applied in real life.
For your rainwater harvesting and water purification working model, you can follow this approach:
Materials Needed:
- For Rainwater Harvesting (Rooftop House Model):
- Cardboard (for house and roof)
- Plastic sheet (to represent rainwater collection)
- Small pipes or straws (to channel water)
- Plastic bottle or container (to store collected water)
- For Water Purification:
- Plastic bottle (cut in half to act as a filtration unit)
- Layers of filtration:
- Big gravel (removes large debris)
- Small gravel (further filtering)
- Sand (traps fine particles)
- Coal (removes impurities and odor)
- Tissue paper/cotton (final filtering for clean water)
How to Build the Model:
- Construct the House Model:
- Use cardboard to create a house with a sloped roof.
- Attach a plastic sheet on the roof to simulate rainwater collection.
- Fix small pipes or straws to direct the collected water into a storage container (bottle or tray).
- Set Up the Filtration Unit:
- Cut a plastic bottle in half and invert the top part to create a funnel.
- Layer the materials (big gravel at the top, followed by small gravel, sand, coal, and tissue paper at the bottom).
- Place the bottle over another container to collect the filtered water.
- Demonstrate the Process:
- Pour water from the house model into the filtration unit.
- Show how the water passes through each layer and gets purified.