Methods of Water Harvesting :How to Recover Rainwater?

The principle of recollecting rainwater:

It is an old technology with about 4000 years of history that is now regaining its popularity due to the water scarcity that the world is facing. The technology seems to have been developed and used in ancient Palestine and Greece.

There are three important steps involved in recollecting rain water:


A recuperator is directly placed under the pipe line that brings down the rain water from the roof to collect.

Storage of rainwater:

A collector is then responsible for storing rain water and shipped. These collectors come in different shapes and sizes. These could be either placed above the ground or under the ground. Keep in mind that the distance from the gutter to the collector is important if you want to haven an effective system.

Delivery of water: Y

ou could either deliver the collected water through a pumping system or a collector. Pumping system is more convenient. A submersible pump is immersed in the collector and manually triggered at the time of drawing water. A piping system then can deliver water that is being pumped.

Why collect rainwater?

The recovery of rainwater = A contribution to the environment.

  • Each person consumes an average of between 150 and 180 liters of water per day.
  • The consumption of water for drinking or food preparation is only 5 to 10 liters of water per day per person. That means the rest of the water is being used for other purposes such as cleaning and gardening.
  • Rainwater can easily be used for activities that do not require quality water supply such as:
    • flushing toilets
    • garden and outdoor watering
    • washing machine
    • cleaning floors, washing cars

The recovery of rainwater = An economical solution.

  • Drinking water is more expensive.
  • Rainwater is free.
  • With 100 square meter of roof, it is possible to recover between 3000 and 60,000 liters of rain water per year, depending on the region.

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