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Every Drop Counts (Smart Rainwater Harvesting & Baoli Pump)

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Construct a model stepwell (Baoli) and rooftop rainwater harvesting system. Rain sensors detect rainfall, routing water into underground storage tanks, while an automated water pump fills the Baoli stepwell.

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Props & Materials Required

  • •3D model of traditional Indian Baoli (stepwell) and house roof
  • •Raindrop detector sensor board
  • •Water level float switch / ultrasonic depth sensor
  • •3V mini DC submersible water pump & relay module
  • •ESP32 controller board
  • •16x2 LCD display screen
  • •DFPlayer Mini MP3 module + 3W speaker

Step-by-Step Instructions

1

Simulate Rainstorm on Roof

Sprinkle water on the house roof rain sensor.

2

Rain Sensor Triggers Filter Valve

Rain sensor detects rain! Servo motor switches filter valve to route roof water into the underground Baoli tank.

3

Track Baoli Water Level

Ultrasonic depth sensor tracks water rising in the Baoli: '25%... 50%... 100% FULL!'.

4

Water Conservation Audio Report

LCD displays 'Stored: 500 Liters Rainwater! Saved 100% of storm runoff!'

Why It Works & Notes

Every Drop Counts teaches India's rich water harvesting heritage (Ghadsisar lake, stepwells). Building a rooftop rainwater harvesting system with rain sensors and automated Baoli pumps demonstrates sustainable water management.