Quick Answer
Cisterns and rainwater harvesting systems work together by collecting and storing rainwater for later use, often in conjunction with a cistern buried underground to protect the water from contamination and evaporation. This combination provides a reliable source of clean water for households, livestock, and irrigation. A properly designed cistern and rainwater harvesting system can reduce water bills and reliance on municipal water supplies.
Designing a Cistern and Rainwater Harvesting System
When designing a cistern and rainwater harvesting system, it’s essential to consider the size and material of the cistern. A buried concrete cistern can store up to 5,000 gallons of water, providing enough supply for a small household. The cistern should be designed with a roof catchment area of 1,000 to 2,000 square feet to collect sufficient rainwater. A first flush device can be installed to divert the initial flow of water from the roof, carrying debris and contaminants away from the cistern.
Installing a Buried Concrete Cistern
To install a buried concrete cistern, excavate a trench 6-8 feet deep and 4-6 feet wide, depending on the cistern’s size. The cistern should be placed level and securely anchored to prevent settling or movement. A layer of gravel or sand should be added at the bottom of the trench to facilitate drainage. The cistern should be sealed with a waterproof coating and connected to the rainwater harvesting system via a network of pipes and fittings.
Maintenance and Upkeep
Regular maintenance is crucial to ensure the cistern and rainwater harvesting system remain functional and clean. Check the cistern’s water level and inspect the roof catchment area for debris and contaminants. Clean or replace the first flush device as needed, and inspect the pipes and fittings for signs of damage or corrosion. By following these guidelines and performing regular maintenance, a cistern and rainwater harvesting system can provide clean, reliable water for years to come.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.