Rainwater harvesting is the process of collecting and storing rainwater for future use.

Rainwater harvesting can help reduce flooding, improve water quality, and recharge groundwater, but it does not increase water bills.

Rooftop harvesting is the most common method of rainwater harvesting, where rainwater is collected from rooftops and stored in tanks or cisterns.

The minimum annual rainfall required for effective rainwater harvesting is 500 mm.

Rainfall intensity is the most important factor to consider when designing a rainwater harvesting system, as it determines the amount of water that can be collected.

The typical storage capacity of a rainwater harvesting system is 2000 liters.

Plastic is the most common material used for rainwater storage tanks due to its low cost, durability, and ease of installation.

The average lifespan of a rainwater harvesting system is 20 years.

The payback period for a rainwater harvesting system is typically 10 years.

Harvested rainwater can be used for drinking, cooking, irrigation, and other purposes.

Filtration is the most common method of treating harvested rainwater for drinking, as it removes impurities and contaminants.

Drip irrigation is the most common method of irrigating crops with harvested rainwater, as it is efficient and conserves water.

Rainwater harvesting can be challenging due to high initial cost, lack of space, and water contamination.

Rainwater harvesting can reduce flooding, improve water quality, increase water bills, and recharge groundwater.

Rainwater harvesting can be used for domestic use, agricultural use, industrial use, and other purposes.