NEED FOR INTER STATE COOPERATION IN … ppt 3...CHENNAI METROPOLITAN AREA CHENNAI METROPOLITAN AREA...
Transcript of NEED FOR INTER STATE COOPERATION IN … ppt 3...CHENNAI METROPOLITAN AREA CHENNAI METROPOLITAN AREA...
R.Subramanian
Chairman, Cauvery Technical Cell Cum Inter State Waters Wing,
WRD,PWD,Tamil Nadu.
3.8.2019
BRAIN STROMING MEET ON CHENNAI WATER
MANAGEMENT ORGANISED BY IMD,CHENNAI CHAPTER
NEED FOR INTER STATE
COOPERATION IN SOLVING WATER
CRISIS OF CHENNAI CITY
CHENNAI METROPOLITAN AREA
CHENNAI
METROPOLITAN
AREA (CMA)
1189 sq.km
Spread over Chennai, Kanchipuram and
Thiruvallur districts.
Chennai Corporation, 8 Municipalities,
11 Town Panchayats and 179 Village
Panchayats ( 10 Panchayat unions).
CHENNAI
CORPORATION426 sq.km.
Sl. No Year Population
In lakhs
Water Demand
MLD
1 2010 85
2 2015 97 1136
3 2020 110 1721
4 2035 154 2522
5 2050 157 3746
WATER DEMAND
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mm
YearSWM Rainfall-Actual NEM Rainfall-Actual
SWM Rainfall-Normal NEM Rainfall-Normal(439 mm) (790 mm)
South-West and North-East Monsoon Rainfall from 2008 to 2018 - Chennai District
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South-West and North-East Monsoon Rainfall from 2008 to 2018 - Thiruvallur District
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SWM Rainfall-Actual NEM Rainfall-Actual
SWM Rainfall-Normal NEM Rainfall-Normal(452 mm) (590 mm)
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South-West and North-East Monsoon Rainfall from 2008 to 2018 - Kancheepuram District
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SWM Rainfall-Actual NEM Rainfall-Actual
SWM Rainfall-Normal NEM Rainfall-Normal (642 mm)(491 mm)
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Rainfall in the catchment area of City
water supply Reservoirs (in mm)
Year30 years
AverageActual % deviation
2012 1293 992 (-) 24
2013 1298 1065 (-) 18
2014 1286 1026 (-) 20
2015 1273 2155 (+) 69
2016 1308 837 (-) 36
2017 1306 1388 (+) 6
2018 1314 880 (-) 33
PRESENT WATER SUPPLY SOURCES
A. SURFACE WATER
SL.
NO.
RESERVOIR / TANK DESIGNED
CAPACITY
(Mcft.)
1 Poondi 3231
2 Cholavaram 1081
3 Red Hills
(Puzhal lake)
3300
4 Chembarambakkam 3645
5 Veeranam 1465
Total 12,722
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Present Water Supply Sources (contd…)
C. GROUND WATER
From Tamaraipakkam, Minjur, Punjetti, and Neyveli
aquifer about 35 to 65 mld is being supplied.
Sea water has already intruded.
B. THE VEERANAM WATER SUPPLY SCHEME
About 170 mld is supplied
Source: Release from Mettur reservoir.
D. DESALINATION PLANTS
Minjur (2010) 100 mld
Nemmeli (2013) 110 mld
E. KRISHNA WATER SUPPLY
• 15 TMC is to be transferred from Srisailam
Reservoir across the Krishna river in A P to
Poondi Reservoir
• Maharashtra, Karnataka and A P agreed to
supply 5 TMC each from Krishna waters to
Chennai water supply, in 1976.
• In 1983 A P and T N entered into an
Agreement on the month wise schedule of
supply of Krishna Water to Chennai City
Water Supply.
Present water supply sources ( contd…..)
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E. KRISHNA WATER SUPPLY (Contd…)
• The length of the link canal from Srisailam reservoir
upto the inter-state border is about 380 km.
• The length of canal from Kandaleru Reservoir in
Andhra Pradesh to Poondi Reservoir is about 152
km.
• Allowing 3 TMC for transmission loss, 12 TMC is to
be ensured by Andhra Pradesh at the State
border, 8 TMC from July to October and 4 TMC from
January to April.
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E. KRISHNA WATER SUPPLY (Contd…)
COMMITTEES
A Liaison Committee has been constituted with the Chief
Secretaries and Engineers from both
Tamil Nadu and Andhra Pradesh, to discuss the issues
relating to the project. 45 Meetings have been conducted
till now.
Inter – State Commitee
Krishna River Management Board (KRMB) has
constituted a Committee under its Chairperson with
Engineers–in–Chief of Maharashtra, Karnataka, Andhra
Pradesh, Telangana and Tamil Nadu as its Members, to
ensure supply to Chennai city in 2018. 2 Meetings have
been conducted till now.
ON GOING SCHEMES
A. THERVOY KANDIGAI RESERVOIR
Launched in 2013
The waterbodies, viz., Thervoy Kandigai and
Kannankottai are linked to form a reservoir. It can store
about 1 TMC in a year.
From this Reservoir water will be conveyed through 66
km long pipeline to Poondi reservoir, from where it will
be used for drinking water supply.
On going schemes (contd…)
B. DESALINATION PLANTS
Location Capacity (Mld) status
Nemmeli 150 Construction commenced
in June 2019
Perur 400 Environmental clearance
obtained
FUTURE NEEDS
• Even after accounting the reuse of treated
sewage and other effluents, and Rain
Water Harvesting sources for meeting
future water needs of Chennai Metro and
the need during deficit years new sources
are to be identified and executed
Inter basin transfer is one possibility
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POLICY OF GoI
NATIONAL WATER POLICY 2012.
Drinking water is the first priority.
It emphasises transfer of water from
Surplus basin to deficit basin for
beneficial uses.
Cooperation from the basin States is
must for the successful implementation
of the National Water Policy.
INTER STATE COOPERATION
SIRUVANI WATER TO COIMBATORE CITY
An Inter State Agreement concluded in 1973
between Kerala and Tamil Nadu for the construction
of a Dam in the territory of Kerala to store 650 Mcft
of Siruvani water for providing water supply to
Coimbatore city. The Agreement is valid for 99 years.
Coimbatore Corporation gets 1.30 TMC annually
(100 MLD) from Siruvani Dam.
The project was taken up in 1977 and completed in
1983 with the cooperation of Kerala.
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Siruvani
dam
GODAVARI (INCHAMPALLI/JANAMPET) – KRISHNA
(NAGARJUNASAGAR) - PENNAR (SOMASILA) -
ARANIYAR – PALAR- PENNAIYAR - CAUVERY
(GRAND ANICUT) - LINK PROJECT
LINKING GODAVARI WITH CAUVERY
Godavari
Krishna
Pennar
Cauvery
Janampet Polavaram
80
Nagarjunasagar
Somasila
Kattalai
Barrage
Grand
anicut
Vijayawada
247
46
Water to be
diverted in
TMC ft.
Godavari – Pennar – Cauvery Link Alternate Proposal (2019)
83 AP – TN Border
Inchampalli
Prakasam
Barrage
Upper
Anicut
Lower Coleroon
Anicut
Dowleswaram
Barrage
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Month No. of
Days
of
supply
Diversion at Janampet
Barrage across
Godavari
Water to be
received at
AP - TN
border
TMC (MCM) % TMC (MCM)
June 20 13 (360) 5.1 -
July 31 61 (1736) 24.8 25 (708)
August 31 68 (1930) 27.6 23 (652)
September 30 59(1674) 23.9 20 (566)
October 31 46 (1300) 18.6 15 (436)
Total 143 247 (7000) 100 83 (2362)
PROBABLE MONTH WISE FLOW EXPECTED AT ANDHRA
PRADESH – TAMIL NADU BORDER
COOPERATION FROM NEIGHBOURING
STATES
The Godavari – Cauvery link
scheme needs the cooperation of
Telengana, Andhra Pradesh and
other basin States of Godavari
river, namely, Maharashtra, Odisha,
Chattishgarh.
SUPPORT FROM
GOVERNMENT OF INDIA
GoI has to take up this linking
scheme as a National Scheme and
plan to execute the scheme early.
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