Sri Aurobindo Ashram's system
stop even a drop of rain from flowing out of its campus,Mothers International
School, New Delhi, approached CSE for technical guidance. "We went for one of
CSEs miscellaneous services in 2002, and realised the need to extend the water works
done in 1995 to the entire campus, covering an area of over 95,870 square meters (sq
m)", informed PLBhola, vice principal of the Mothers International School,
located within the Aurobindo campus. Expressing concern he said that, "The water
table is around 27.4 meters (m) below ground level, and we do not want situation to
deteriorate any further".
CSE designed the RWH system. The works have recently completed at the total cost of Rs
4 lakh. The entire campus that has the annual potential of harnessing about 16,366 cubic
meters (cu m) of runoff from surface and rooftop has been effectively tapped.
|Find out the cost of implementing RWH
system from:R K Srinivasan / Saluddin Saiphy, Every Friday (2 -6 pm) at:
India Habitat Centre,
Core 6A, Fourth Floor,
Lodhi Road, New Delhi 110003
The designs ensure that the roofwater from all the four
buildings within the campus - Mirambika School, Mothers International School,
Tapsasya and their office block gets collected for recharge in an integrated manner.
The runoff from Mirambika is diverted to a dry open well
(about 18 meter (m) deep) through a network of pipes and collection chambers. The runoff
from northern side of Mothers International building gets accumulated in the three
collection chambers. Then, after passing through a filtering media made of sand and
pebbles, it is diverted to a recharge borewell (about 16 m deep). From the southern side,
the water is diverted to a recharge well. Similarly, from the other two buildings,
rainwater is channelised to an abandoned borewell.
The surface runoff from the unpaved (playground) and paved
grounds (power station etc) is also collected and used for recharge. Sri Aurobindo Ashram
is one of CSEs upcoming model projects.
PLBhola, Vice Principal
Mothers International School
Tel: 26524817, 26865400
Rice husk ash filter
The incidence of water borne diseases has drastically reduced in the 180
households of Pusane village, Pune district. However, a few years back, the village was
plagued with such problems. All this changed, as they started using the rice husk
ash-based water filter designed by Tata Research Development and Design Centre (TRDDC), a
division of Tata Consultancy Services (TCS). It is a simple and low cost method to provide
safe drinking water.
The filtering medium is made up of rice husk ash (RHA), which is abundantly available
in rural India. RHA contains activated silica and carbon that helps in removing colour,
odour, suspended particles and microorganisms. Cement is used as the binder while pebbles
support the matrix. The filter has two parts. Its top portion is made of food grade
plastic material (a form of plastic approved to keep food items) - costing Rs 150. It can
be reused after the expiry of the filter element's life (6 to 8 months) by replacing the
filter bed. The cost of such replacement is Rs 25. The lower part of the filter could be
any container of the user's choice. TRDCC does not manufacture or sell the filters.
Sevalaya in Chennai and Indian Institute of Youth Welfare in Nagpur are some of the
organisations promoting it as well. Till date, more than 4,200 filters have been
installed, with encouraging results.
Dr Kalyan K Das,
Clay pot irrigation
It is a form of irrigation that is easy to install,
operate and maintain.
The water is stored in the clay pots, which are buried in
the ground. And, slowly the water is released to the plants. This system can either
include an individual pot or a series of pots connected with a plastic tube. The pots used
are similar to the ones used in homes for storing water and can hold 10 to 12 litres of
water. After a period of six months the pots need replacement. The technique allows for an
economical use of water, since loss due to percolation and surface runoff is eliminated.
Despite being one of the oldest irrigation methods, it is still popular with the small
family farms growing vegetables and fruits. In many Latin American countries, the
government is using this technique to combat poverty.