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DISASTER PREPAREDNESS, MITIGATION AND REHABILITATION

desalination plants located at Minjur and Nemmeli. Transportation of water from Jolarpetto Chennai through during the acute shortfall of storage from March to it leads to an acute shortage in the reservoir level and
During the normal season about 830 MLD of water will rail wagons was estimated with a total cost for November. thereby affects water supply to the residents of Chennai.
be supplied to Chennai city. transportation of 10 MLD of water for a period of 6 The first desalination plant of 100 MLD capacity on
Recycle and reuse of wastewater by Tertiary Treatment
months as Rs. 66 Crore. At Jolarpet Railway Station, Design, Build, Own, Operate and Transfer Basis
The year 2016 has faced the worst rainfall in the last 140 Reverse Osmosis is a technology-driven intervention to
water has been filled in 50 Wagons each having a capacity (DBOOT) was established at Minjur in the year 2010 and
years in Tamil Nadu. The performance of North East ensure uninterrupted supply of water to the industries.
of 55 KL and thus transporting 2.75 ML per trip and by subsequently, another plant of 100 MLD capacity at
Monsoon in 2016 was far from the expected lines. Owing Adoption of state-of-the-art technology to address the
making 2 trips in a day and 5.50 ML of water is being Nemmeli, with full financial assistance from the
to the rise in water demand and looming climate change, water security of the city has been the key feature of this
brought daily to meet the drinking water needs of Chennai Government of India in the year 2013 are currently
recent years have witnessed much focus on drought project.
city. By this arrangement, CMWSSB has received a total operational and playing a major role in fulfilling the water
scenarios. Considering the constraints in creating new
of 159 trips amounting to the quantity of 438 ML of water The sewage generated in the Central Chennai and West supply requirements of Chennai city.
large water storage reservoirs for augmenting the city
from Jolarpet to Chennai through railway wagons. Chennai City area and adjacent urbanised areas of
water supply and meeting the ever-growing demand, The establishment of another 150 MLD capacity
Ambattur (Part) and Mogappair is conveyed to
CMWSSB in its effort to decentralize and identify PROCESS: desalination plant is under progress with grants under
Koyambedu STP for treatment and disposal. The present
additional sources for city water supply, found an AMRUT scheme and financial assistance from KfW, the
Converting the abandoned mining quarries into water generation of sewage is about 120 MLD. Out of the 120
opportunity and made a never before attempted effort to German funding agency at an estimated cost of Rs.
reservoirs taken up as a drought contingency measure is MLD, 65 MLD of wastewater shall be treated up to the
convert the abandoned mining quarries in the vicinity of 1259.38 Crores. One more desalination plant of 400
first of its kind and does not have any previous tertiary level to get the product water of 45 MLD through
Chennai city into water reservoirs. Abandoned stone MLD capacity is to be implemented at Perur along the
engineering references to rely upon. Initially, the Reverse Osmosis and distributed to SIPCOT Industries in
quarries not only offer promise for expanding the East Coast Road in South Chennai with financial
possibilities of using the stored water left stagnant in the Irungattukottai, Sriperumbudur and Oragadam in south-
available reservoirs for drinking water supply system but
a b a n d o n e d q u a r r i e s a t S i k k a r a y a p u r a m , west part of Chennai city. assistance for an approximate value of Rs. 4267.70 crores
also provides hope for acting as new reservoirs if
Malayambakkam, Pammal, Thiruneermalai, Pallavaram from Japan International Co-Operation Agency (JICA).
implemented across the country. Similarly, the sewage generated in the North Chennai and
and Nanmangalam were explored and twenty-five The balance amount Rs. 1810.70 crores will be met out by
part of Central Chennai City area and adjacent urbanised
CMWSSB also embarked on a unique initiative of setting quarries at Sikkarayapuram and Malayambakkam were Tamil Nadu Infrastructure Development Board (TNIDB)
areas of Madhavaram and Kathivakkam is treated in
up the largest tertiary treatment plants in the last two years taken up for study and implementation in 2017, due to fund and Government of Tamil Nadu (GoTN).
Kodungaiyur STP. The present generation of sewage is
which have been commissioned and supplying 90 MLD their proximity to Chembarambakkam Water Treatment
about 220 MLD. Out of the 220 MLD, 65 MLD of The TTRO Plant at Koyambedu was established at a cost
of potable quality reuse water to the industries in the city. plant. On ascertaining a quantity above 3000 ML from
wastewater shall be treated up to the tertiary level to get of Rs. 486.21 crores. Rs. 231.50 crores has been received
Chennai will become the first Indian city to recycle and the surveys and quality of the stored water within
the product water of 45 MLD through reverse osmosis as Grant from GoTN under Tamil Nadu Investment
reuse 20% of its sewage, which will be the highest treatable limits, it was proposed to transfer the water for
and distributed to industries in Manali–Ennore Corridor Promotion Programme (TNIPP) Phase- I, Rs. 208.82
performance of any Indian city in that matter. 30 MLD of further treatment at the 530MLD treatment plant at
and Manali–Minjur Corridor, North Chennai. crores has been sanctioned as grant from Government of
secondary treated sewage is being supplied to the Chembarambakkam which is about 3 km away.
India and GoTN under AMRUT and Rs. 30.00 crores as
industries from the year 1993. On the whole, 120 MLD of During execution of the project, an extensive awareness
The water evacuation operation both for inter-basin
freshwater supply to the industries is saved which will campaign was undertaken on the importance of recycling grant from GoTN under Chennai Mega City
transfer and transmission to WTP has to be carried out in
reduce the demand-supply gap. and reuse. Market linkages were established upfront with Development Mission (CMCDM). Similarly the TTRO
treacherous terrain. The short period and large quantity to
all industrial stakeholders by holding repeated meetings Plant at Kodungaiyur was established at a cost of Rs. 348
Due to the depleting storage of Veeranam lake, it was be evacuated considering evaporation loss pose
and visits to the plant to allay all concerns about the safety crores. Rs. 153.00 crores as loan and Rs. 76.50 crores as a
considered necessary to identify additional sources to challenges in the ready availability of materials, machines
and quality of reuse water. The product water was grant has been received from Tamil Nadu Sustainable
compensate for the quantity reduction in lake drawl. and mobilization of required capacities immediately at
christened as “TRU water” (Tertiary Reusable Water) in Urban Development Project (TNSUDP) under World
Accordingly, an additional 30 MLD of water was drawn the site. As a result, a total of 400 mcft or 11.32 mcm
the lines of Singapore's 'NEW water' for branding. Also, Bank funds and Rs. 118.67 crores has been sanctioned as
from Wallajah lake directly which was conveyed through storage capacity was added to the city in a short period of
Resident Welfare Associations were actively invited for grant from the Government of India and GoTN under
400 mm HDPE pipeline to Vadakuthu WTP for treatment. time and around 3000 million litres of water was supplied
advocacy workshops to explain the noble concept that AMRUT. The technical and human resources
The work was executed within a short period of 10 days at during an acute water shortage situation. Subsequently,
was being adopted. contributed by the Engineers & employees of CMWSSB,
a total cost of Rs. 70.14 Lakhs. The pumping operations they have been systematically interlinked and connected
TWIC and the contractors M/s. BGR Energy Systems
were commenced on 20.08.2019 and a total of 220 ML of to the centralised water distribution system. Again in MOBILISATION OF RESOURCES:
Limited, Chennai and M/s. Wabag & IDE consortium,
water was drawn by this arrangement till 29.08.2019. 2019, nearly 4500 ml of water was supplied to the city Chennai city is mainly depending on the rainfall during
Chennai was the success in implementing these projects.
monsoon for the water storage. Whenever monsoon fails,
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