Madhu Bhatnagar of Shriram
School, Vasant Vihar, receiving Rs 1 lakh special award for her
initiatives in implementing and popularising rainwater
harvesting in her school.
RAINWATER AVAILABLE FOR HARVESTING
Total rooftop and surface area 6000 square metres (sq m)
Average annual rainfall in Delhi 611 millimetres (mm)
Total volume of rainwater harvested: 1890 cubic metre (m³),
or 18,90,000 litres
This represents 55 per cent of the total water harvesting potential.
WATER SUPPLY SOURCE
A single borewell in the school is the main source of water
supply. The remaining requirement is supplemented by municipal
water supply.
RAINWATER HARVESTING SYSTEM
Rooftop rainwater harvesting: Rooftop rainwater outlets are
interconnected through a network of pipes and collection chambers
which lead to a filtration-cum-buffer tank of 21,250 litres.
The overflow from the tank is diverted to a borewell of 200mm
diameter and 30m depth to facilitate recharging of the underground
aquifer.
The project was implemented in May 2000. The cost of the
entire rainwater harvesting system was Rs 1.25 lakh.
IMPACT
Water level data
The Sri Ram School is located in the ridge area. The water level
in the school premises was 40m below ground level (bgl) in May
2002. After implementing the rainwater harvesting system, water
levels rose remarkably. The water level in September 2002 was
35.1m (bgl) while in May 2003 it was 38.1m (bgl). The water
level in July 2003 was measured at 33.2m (bgl), representing
a total rise of 6.8m, or 22.3 feet.
"We took up rainwater harvesting when we realised
that this was the only way to avert a crippling water
shortage in the future. The enthusiasm of the children
was our driving force. Now we all feel that we have been
able to make a significant change and it's a great feeling."
For Details: Ms.
Madhu Bhatnagar (Deputy Head),
The Shri Ram School,
D-3 Street, Vasant Vihar,
New Delhi
Telephone: (011) 26140884, 26149572
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