Panchsheel Park Colony's Rainwater Harvesting System | Centre for Science and Environment


Panchsheel Park Colony's Rainwater Harvesting System

RAINWATER AVAILABLE FOR HARVESTING

Total rooftop and surface area 3,57,150 square metres (sq m)

Average annual rainfall in Delhi 611 millimetres (mm)

Total volume of rainwater harvested: 1,74,575 cubic metre (m³), or 174,575,000 litres

This represents 80 per cent of the total water harvesting potential

WATER SUPPLY SOURCE
The water supply is mainly through six borewells. Three each are owned by the Panchsheel Cooperative Group Housing Society and the Delhi Jal Board respectively. The remaining water requirements are met by individual borewells.

RAINWATER HARVESTING SYSTEM

Rooftop rainwater and surface runoff harvesting: A network of stormwater drains in the entire residential area is used for harvesting rooftop rainwater and surface runoff. About 36 Recharge wells measuring 1m x 1m x 2m are constructed in the stormwater drain for facilitating groundwater recharge. The quality of runoff, which passes through a 15m borewell installed inside the recharge well, is ensured through a filter bed of pebbles.

The project was implemented in June 2002. The cost of the entire rainwater harvesting system was Rs 8 lakh.

IMPACT

The water level in the Panchsheel Park area, considered one of Delhi's posh colonies, was declining rapidly. Keeping in view the growing water problems, the Resident Welfare Association established a rainwater harvesting system for the entire colony.

Results of monitroing
Water level 2006
 
Water level 2005
Water level 2003-2004
 



Water Level 2006


Water Level 2005

water level trends


Water Quality 2005
 

Water Quality 2004

Water Table 2003-2004

water Trends


Water quality
2002
Click to enlarge
 
Click to enlarge
Krishan Saigal, President, Panchsheel Cooperative Group Housing Society

"When we first approached engineers for a design to set up harvesting structures in our colony, we were completely taken aback by the extraordinarily high cost quoted by some of them. So we started looking for other options. Centre for Science and Environment offered us a design that could be put together in less than half the cost. It adopted simple traditional techniques, and required very little construction work. And we went ahead with it."

For Details:
Mr Krishan Saigal,
Panchsheel Club,
Panchsheel Park Colony,
New Delhi
Phone: (011) 26495901, 26491895, 26498511

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