Why rainwater harvesting?
In areas where water supply is problematic or water resources are scarce, rain harvesting is a good solution. It reduces the use of treated municipal water for uses such as landscaping, toilet flushing and laundry; reduces the need for well drilling; and reduces peak storm water volume.
Rainwater harvesting can provide clean water-supply for a small community. Especially when pipelines are too expensive to set up and one central well or pump cannot be used all around the year, a rainwater catchment system is a workable solution.
Some advantages of rain harvesting:
- Easily accessible
- Set-up costs are low, with construction easy, materials low-cost and maintenance cheap
- Sustainability is higher
- Easily adaptable to different types of communities
Components of a rainwater harvesting system
A rainwater harvesting set-up is composed of a water-collection system, a storage cistern and a water distribution system. It mainly needs:
- Rain, and plenty of it preferably
- A catchment area
- Gutters or pipes
- Storage tank
- Filter (can be a simple metal screen filter or slow sand filter or even more sophisticated types if required or available)
- Pump or pressure tank for distribution