AvatarMeenakshi Arora asked 10 months ago
Summary
How to start rainwater harvesting in an existing building?
Article Name
How to start rainwater harvesting in an existing building?
Description
Rainwater harvesting helps save water effectively. Currently a lot of existing buildings do not have systems though which they can harvest rainwater but can start doing so easily.
Author
Publisher Name
GreenSutra
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1 Answers
Team GreensutraTeam Greensutra Staff answered 10 months ago

Currently a lot of existing buildings do not have systems through which they can harvest rainwater but can start doing so easily with a few simple steps.

Step 1: Identify a suitable catchment area 

  • In most of the cases, the roof of an existing structure is best suited as a catchment area for rainwater harvesting.

Step 2: Estimate Rainwater Harvesting Potential

  • Estimating the rainwater harvesting potential from the catchment area helps fashion and install a correct  storage or collection tank for the harvested rainfall.
  • Formula to estimate Rainwater Harvesting Potential = Surface Area of catchment (sq. ft.) x Runoff Co-Efficient of Catchment Surface x Amount of Rainfall (mm)
  • Or the following calculator can also be used to estimate the rainwater harvesting potential:




Step 3: Select or Design Water Storage or Collection Tank

  • It is difficult to select the correct size of a storage or collection tank in an existing building.
  • Size of tank is affected by:
    • Available Space
    • Estimated Rainwater Harvesting Potential
    • Purpose of the harvested rainwater

Step 4: Connect existing Plumbing services of the building to selected tank

  • Every structure installs plumbing services such as PVC pipes to direct rainwater falling on the rooftops to the catch basins of buildings.
  • In most cases, the same pipelines can be used to direct the rainwater from the roof to the designed or selected water storage/collection tank.

Step 5: Start Rainwater Harvesting

Summary
How to start rainwater harvesting in an existing building?
Article Name
How to start rainwater harvesting in an existing building?
Description
Rainwater harvesting helps save water effectively. Currently a lot of existing buildings do not have systems though which they can harvest rainwater but can start doing so easily.
Author
Publisher Name
GreenSutra
Publisher Logo