Establishment of a Rain Water Harvesting System at Royal College, Colombo
| Project Area | Royal College, Colombo 7 | |
|---|---|---|
| Duration | August 2010 (Project Completed) | |
| Funded by | Royalty Pledge Management Committee, Royal College Union (Behalf of Royal College, Colombo 7) | |
| Objectives |
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| Design of the RWH System | ||
| Rain fall: | Annual 1,700 mm | |
| Roof size: | 59 m x 11 m = 600 m2 | |
| Distribution line: | Estimated 170 ft | |
| Water requirement: | Gardening | |
| Estimated supply of water per day during dry period: | From Total 16 m3 (16,000 liter) of capacity tanks = 1,350 per day | |
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| Specification of RWH Tanks | ||
| Tank capacity and Type: | 2 tanks of 8 m3 (16,000 liters), Ferrocement tanks with a brick base (2ft height) for each tank (Picture 3) | |
| Down pipe: | Water Supply from down pipe to tanks of 4” pipes estimated length 40 m (Picture 1) | |
| First flush & Plug: | First flush of 4” pipe with plug (Picture 2) | |
| Over flow & Washout: | Over flow directed to drain Washout from each tank is accessible from drain (Picture 4) | |
| Distribution pipe | Water distribution pipe from tanks to vegetable garden ½ “ pipe estimated length 60 m | |
  Picture 1 - Down pipe line  Picture 2: First flushing plug  Picture 3 - RWH Tanks  Picture 4 |