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JANKI DEVI MEMORIAL COLLEGE'S RAINWATER
HARVESTING SYSTEM
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Got 2nd rank in Institutional category. , Janki Devi Memorial
College receiving Rs 1 Lakh award from Chief
minister
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.
The project was implemented in June 2001. The cost of
the entire rainwater harvesting system was Rs 0.70 lakh.
IMPACT
Water level data
The Janki Devi Memorial College is located in Delhi's Ridge
area. The water level in the college premises was 35.8 m below
ground level (bgl) in May 2002. After implementing the rainwater
harvesting system on the campus, water levels rose remarkably.
The water level in September 2002 was 22.1m (bgl) while in
May 2003 it was 25.0 m (bgl), a rise of 10.6 m even during
this peak summer month. The water level in July 2003 was recorded
at 35.9 m (bgl).
Water Level 2006
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Water Level 2005
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Water Quality 2005
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Water
Level 2002-2004
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Water quality data 2002
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Ms. Aruna
Ludra, Lecturer (Retired),
English Department
"No one knew what rainwater harvesting was all about
when we decided to take it up in our college. As the work
began the students grew curious and wanted to know more
about it. Now everyone wants to adopt it." |
For Details:
Ms
Aruna Ludra
Dr Indu Anand
Principal
Janki Devi Memorial College,
Sri Ganga Ram Hospital Marg,
Old Rajender Nagar,
New Delhi
Telephone: 011- 25787754, 25710832 (f); Mob: 9811007524
Email: jdmcollege@hotmail.com
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