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.
WATER SUPPLY SOURCE
The water requirement is met by one tube well located near
the parking
and is supplemented by municipal supply. On an average 50,000
litres of
water is consumed daily for potable and non-potable purposes.
RAINWATER HARVESTING SYSTEM
Rooftop rainwater harvesting: Rooftop water from the club
building
flows on the drive way along with surface runoff from paved
areas. This water is collected in a collection chamber of
size 0.6 m x 0.6 m which is covered with a perforated slab
and is placed in a low lying area so that the water can naturally
flow into the collection chamber. Rainwater from this chamber
is diverted into a recharge well measuring 2 m x 2 m x 2 m.
This recharge well is provided with a 20 m deep recharge bore
of 150 mm diameter to facilitate the
movement of rainwater to the subsoil strata. The recharge
well is also
provided with layers of pebbles and coarse sand for filtration
purpose.
Implementation of this project was completed in January 2004,
and
the water level as in January 2005 was around 24.5 m below
ground
level (bgl).
Cost of the rainwater harvesting system: Rs 0.40 lakh
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