RAINWATER AVAILABLE FOR HARVESTING
Total rooftop and surface area:
32,170 square metres (sq m)
Average annual rainfall in Delhi:
611 millimetres (mm)
Total volume of rainwater harvested: 6880 cubic metres (m³) or 68,80,000 litres
This represents about 35 per cent of the total rainwater harvesting potential.
WATER SUPPLY SOURCE
The three borewells inside the campus cater to the total water requirements of the college.
RAINWATER HARVESTING SYSTEM
ROOFTOP WATER HARVESTING: The runoff from the terrace of the college building is channelised into three recharge wells located at three different locations, each measuring 1m x 1m x 2m. All the rooftop rainwater outlets, except that from the Tutorial Block, discharge into stormwater drains and then to the recharge structures. In the Tutorial Block, a network of pipes linked through chambers take the rainwater to the recharge wells. To facilitate groundwater recharge, all structures are provided with 15m deep borewells of 150mm diameter. Layer of bricks filled inside the recharge well ensures proper filtration of harvested water.
SURFACE RUNOFF WATER HARVESTING: The runoff from the unpaved area is intercepted at the main gate by a collection trench. From here the runoff eventually drains into an abandoned open well, which facilitates groundwater recharge.
Ms Aruna Ludra
Dr Indu Anand
Janki Devi Memorial College,
Sri Ganga Ram Hospital Marg,
Old Rajender Nagar,
Telephone: 011- 25787754, 25710832 (f); Mob: 9811007524