As a part of the Centre for Science and Environment's (CSE) campaign to spread awareness about community based rainwater harvesting techniques, the centre has identified twenty one model projects in Delhi. The structures have a distinctive geographical and geological characteristic. CSE has helped in the process of implementation of these and has been monitoring their impact on a regular basis.
RAINWATER AVAILABLE FOR HARVESTING
Total rooftop and surface area: 31,363 square metres (sq m)
Average annual rainfall in Delhi: 611 millimetres (mm)
Total volume of rainwater harvested: 7,867 cubic metres (m 3 ) 78,67,000 litres
Therefore, 26 per cent of total rooftop and surface runoff is being harvested.
RAINWATER AVAILABLE FOR HARVESTING
Total rooftop and surface area: 2,00,916 square metres (sq m)
Average annual rainfall in Delhi: 611 millimetres (mm)
Total volume of rainwater harvested: 48,531 cubic metres (m 3 ) or 4,85,13,149 litres.
Therefore, 39.6 per cent of total rooftop and surface runoff is being harvested.
RAINWATER AVAILABLE FOR HARVESTING
Total rooftop and surface area: 1,13,344 square metres (sq m)
Average annual rainfall in Delhi: 611 millimetres (mm)
Total volume of rainwater harvested: 28,765.8 cubic metres (m 3) or 2,87,65,849.4 litres.
Therefore, 43 per cent of total rooftop and surface runoff is being harvested.
RAINWATER AVAILABLE FOR HARVESTING
Total rooftop and surface area: 3,700 square metres (sq m)
Average annual rainfall in Delhi: 611 millimetre (mm)
Total volume of rainwater harvested: 960.79 cubic metres (m 3 ) or 9,60,797 litres
Therefore, 42 per cent of total rooftop and surface runoff is being harvested.
RAINWATER AVAILABLE FOR HARVESTING
Total rooftop and surface area: 89,370 square metres (sq m)
Average annual rainfall in Delhi: 611 millimetres (mm)
Total volume of rainwater harvested: 32,250 cubic metres (m 3) or 3,22,49,802 litres.
Therefore, 59 per cent of the total rooftop and surface runoff is being harvested.
RAINWATER AVAILABLE FOR HARVESTING
Total rooftop and surface area:
44,029square metres (sq m)
Average annual rainfall in Gurgaon:
577.8 millimetres (mm)
Total volume of rainwater harvested:
18,207 cubic metres (m 3 ) or 1,82,07,031 litres
Therefore, 85 per cent of the total rooftop and surface runoff is being harvested.
RAINWATER AVAILABLE FOR HARVESTING
Total rooftop and surface area: 1,250 square metres (sq m)
Average annual rainfall in Delhi: 611.8 millimetres (mm)
Total volume of rainwater harvested:
272 cubic metres (m3) or 2,72,811 litres
Therefore, 60 per cent of the total rooftop and surface runoff is being harvested.
RAINWATER AVAILABLE FOR HARVESTING
Total rooftop area:
11,080 square metres (sq m)Av
erage annual rainfall in Gurgaon:4
577.8 millimetres (mm)
Total rainwater available from rainfall: 5,441 metre cubic (m 3 ) or 54,41,720 litres (Which is 85 per cent of total rainwater harvesting potential of these buildings.)
RAINWATER AVAILABLE FOR HARVESTING
Total rooftop and surface area: 26,087 square metres (sq m)
Average annual rainfall in Delhi: 61
1.8 millimetres (mm)
Total volume of rainwater harvested: 9,563 cubic metres (m3) or 95,63,494 litres
Therefore, 60 per cent of the total rooftop and surface runoff is being harvested.