Transcript Document

Municipal Corporation of Greater Mumbai
Water Sector Initiatives
Water Supply- Key Issues
Issues pertaining to Quantity of water
•Overall availability and equitable distribution
Issues pertaining to Quality of Water
•Contamination due to aging network
Issues pertaining to Cost of Operations and tariff
structure
Issues pertaining to hours of supply
•Intermittent supply vs. 24X7 supply
Issues pertaining to “unaccounted for water”
•Physical as well as revenue losses
Issues pertaining to Customers’ relationship
management
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Customer Care – Challenges of Rising Expectations & Numbers
Mumbai Water Supply – At A Glance
Water Supply: 3350 Mld
Major Water Treatment Plants:
Bhandup:
Rated capacity 1910 Mld, working
Mld
Panjarapur:
Rated capacity 1365 Mld, working
Mld
Vehar + Tulsi : Rated capacity 90 Mld
at 2100
at 1365
Major Pumping stations:
Pise
Panjarapur
Bhandup
Raoli
Master Balancing Reservoirs : 2
Yewai
Bhandup
Service Reservoirs
: 26
Length of water mains
: 4000 Kms
No. of Distribution Zones
: 109
No. of Leak-detection Zones
: 615
No. of daily operated valves
: 800
4
Existing Water Supply Sources
Sr.
No.
Name of the Source
Year of
Completion
Qty of Water
Supply (MLD)
Total Qty of Water
Supply
(MLD)(Cumulative)
1
Vihar Lake
1860
110
110
2
Tulsi Lake
1879
18
128
3
Tansa Lake
1892 to 1925
485
613
4
Lower & Upper Vaitarna
1957
1142
1755
6
Bhatsa
I Mumbai
1981
455
2210
II Mumbai
1989
455
2665
III Mumbai
1996
455
3120
III A MUMBAI
2007
350
3470 *
Inclusive of 120MLD En-Route Supply
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Sources of Water Supply For Mumbai
Basin wise water
sources
Vaitarna
Upper Vaitarna
Lower Vaitarna
UPPER
VAITARNA
PINJAL
GARGAI
MIDDLE
VAITARNA
LOWER
VAITARNA
SHAI
TANSA
BHATSA
Middle Vaitarna
Pinjal
KALU
Gargai
Bhatsa
Ulhas
Kalu
Shai
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Mumbai Water Supply- Broad Features
•
•
•
•
Mumbai’s Current Population
Mumbai’s water supply
Non-revenue water
Domestic per capita water availability
:
:
:
:
13 million
3350 MLD
20-25%
180 lpcd
:
2 to 4 hours
(excluding 20% leakage & Ind./Com. Demand)
•
Avg. Hours of Supply
•
The per capita water availability in some cities having 24X7 water supply:•
•
•
•
•
•
London
Singapore :
Kuala Lumpur
Paris
Phnom-Penh
: 150 lpcd
160 lpcd
: 120 lpcd
: 150 lpcd
: 45 lpcd
Thus Mumbai has enough water to switch over from the present intermittent pattern
to Continuous pattern of water supply provided:
1. Non revenue water is reduced significantly
2. Customer Demand is managed (including wastage)
3. Supply is augmented as per rising demand (new sources for future demand are created)
24X7 Water Supply- Myths & Realities
•
24X7 water supply is an achievable objective with proper technical &
Managerial reforms.
•
Myth:
The continuous water supply:
 Needs more water
 Expensive
 Is it necessary?
 Is it achievable?
•
Truth:
The intermittent water supply
 Consumes more water.
 Requires huge capital investment & coping costs
 Associated with the water pollution & leakage management problems
 The system is never designed for intermittent supply
 Reduces the asset life
Intermittent System Consumes More Water
1. Consumer taps are usually kept open.
2. There is a tendency to store more water what is
required.
3. The ‘STALE’ water is thrown to store ‘FRESH’
water.
4. High peak needs strong network and more capital
investment.
5. Low pressures increases the coping cost of the
consumer
6. Leak detection & management is difficult.
Benefits of 24 x 7 Water Supply
1. Improved public health through reduction of water
pollution.
2. Better system: Demand management by efficient
metering and rationalization of tariff
3. Better leak detection & control measures.
4. Higher consumer satisfaction: willingness to pay more
and on time.
5. Investments in the network can be optimised.
6. Consumer can utilize his time more productively.
7. Reduction in the coping cost on the consumers.
8. The unregulated ground water exploitation and its
negative environmental impact prevented.
9. Overall economic boost: Improved infrastructure attracts
Industry / Commerce.
Transition from Intermittent to 24X7 Water Supply
Major Water Sector Initiatives

Source Augmentation

Demand-side Management

Supply-side Management
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Source Augmentation - Long Term Plan
In the year 1993, the Govt. of Maharashtra appointed an expert committee under the chairmanship of
Dr M A Chitale (Ex-Secretary, Irrigation Dept) for advice on the long term planning for augmentation
of water supply to Mumbai. The committee recommended development of following sources in
phases
Sr.
No.
Source
Basin
Yield
[MLD]
1
Middle Vaitarna
Vaitarna
455
2
Gargai
Vaitarna
455
3
Pinjal
Vaitarna
865
4
Kalu
Ulhas
590
The GoM has accepted the Dr. Chitale Committee recommendations and has
approved allotment of these sources. The MCGM has therefore taken up the
Middle Vaitarna Project as an immediate additional source of water
supply.Simultaneously feasibility of Gargai and Pinjal Projects is currently being
studied and the report of the Consultants, M/s Mot Mcdonald & Co. in this regard
is currently under scrutiny.
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Demand Supply Scenario
163.8 lakhs
152.99 lakhs
121.94 lakhs
2001
4450
2980
2021
5300
5120
2011
5010
3800
Present Supply 3350 Mld
Demand in Mld
Supply in Mld
Source: Dr. Chitale Committee Report
Source Augmentation
III A Mumbai Water Supply Project
• Present allocation of
•
• Project based on Bhatsa Dam
355 mld water for the
project has been
renewed for 5 more yrs
after 2007.
Additional allocation of
300 mld okayed for
Mumbai from Bhatsa
Dam for five years till
Middle Vaitarna Project
is completed.
• Original cost: Rs. 667 cr;
• Revised estimate: Rs.739 cr
• Earlier scheduled for completion in 2009,
this project is fully commissioned in May
2007, giving 355 mld of additional water to
Mumbai
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Middle Vaitarna Water
Supply Project
Approved Project Cost:
Rs.1,329.50 crore
Project is based on a new dam to be constructed
between Upper Vaitarna dam and Modak Sagar
Environmental Clearance along with permission for
diversion of 634 ha of forest land received from the
Ministry of Environment & Forest, Govt. of India
Detailed estimates of all the components of the scheme
prepared through Consultants.
Tenders invited for most of the components of the
Project Agency fixed for the Tunnel & Pipeline
components
The work on the Project expected to start in Oct 2007.
Rehabilitation Plan for the 43 Project Affected Persons
has been submitted to the District Rehabilitation Officer
Thane for implementation after securing approval of the
State Rehabilitation Authority
Proposal for
financing under
JNNURM cleared
in February ’07 by
the Government
of India.1st
installment of grant
released.
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Middle Vaitarna Project Financing
Share of State
Gov.(15% )
Rs.199.43
Crores,
MCGM share,
(50% )
Rs.664.75
Crores,
Share of GoI
under
JNNURM
(35% )
Rs.465.32
Crores
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Demand/Supply Side Initiatives
Apart from source augmentation, the
Corporation is also taking a number of
measures on both, the Demand side as well
as the Supply side to ensure greater
efficiency and consumer satisfaction.
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Demand Side initiatives
• Universal metering is being introduced to enable the citizens pay as per their
consumption
Expressions of Interest have been called for short-listing one or more agencies for
supply, installation, operation/maintenance & reading of water meters throughout
Mumbai. The agency will be appointed by the end of November 2007.
• Telescopic Rates to encourage conservation of water are proposed to be introduced
after installation of meters on the connections to domestic consumers of planned
buildings
• Proposed Tariff Structure is as under :
• Upto 150 lpcd One time
• 150 to 200 lpcd Two times
• 200 to 250 lpcd Three times
• 250 lpcd & above Four times
• Proposal is under consideration at the level of the Group Leaders and the Standing
Committee.
• Prepaid water meters- water connections with prepaid meters are proposed to be
given to the inhabitants of unauthorised slums & structures so as to avoid stealing of
water & tampering of the watermains and thereby cut down the wasteful use of water.
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Supply Side initiatives
Comprehensive Water Supply Distribution Improvement Programme is
being taken up under the guidance of a reputed Consultant, broadly along the
following lines -
Water Distribution Management & NRW Reduction:
1. Digital mapping of the utility on GIS compatible base maps.
2. Hydraulic modeling of the entire network.
3. Hydraulic model of DMA, each comprising about 1000
connections.
4. 100% Consumer metering, Bulk metering and District
Metering set-up.
5. Water balance and estimation of NRW/UFW
6. Leakage detection, Repairs / Rehabilitation / Replacement
plan
7. Water balance. If NRW within limits, implement 24X7 supply
8. Introduce pressure regulating devices for equitable
distribution
9. Introduce / upgrade Distribution management tool ‘SCADA’
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IMPROVEMENT IN PRIMARY NETWORK
• A massive programme for replacement of Tansa Water
main is proposed to be undertaken from Gundavali to
Tansa due to ageing of old pipes.
• Replacing Tansa and Vaitarna Mains between Gundavali
and Bhandup Complex by 5500 mm dia. Tunnel for a
length of 15 Kms.
• DPRs of these projects are under preparation and would
be submitted to GoI for availing financial assistance
under the JNNURM.
Improvement in Secondary Network
A major programme has been taken up for replacement of
Trunk mains / Inlets / Outlets by Tunnels due to aging of pipe
lines, and to avoid leakages (i) Replacing Tansa and Vaitarna Mains between Maroshi and
Ruparel by 3000mm dia. Tunel for a length of 12 Kms.
(ii) Replacing of Outlets of Malbar Hill Reservoir between Malabar
Hill and Cross Maidan by 2200mm dia. Tunnel for a length of 3.6
Kms.
(iii) Replacing of Outlets of Veravali Hill Reservoir between
Veravali Hill and Yari Road by 2200mm dia. Tunnel for a length of
6.1 Kms.
TUNNEL FROM MAROSHI TO RUPAREL COLLEGE
TUNNEL - SHAFT EXCAVATION
(Photographs from earlier works)
TBM CUTTER HEAD-FRONT VIEW
STEEL LINER PLATES BEING FIXED
Steel Liners
LOOSE ROCK FALL ON TBM FRONT PORTION.
REINFORCEMENT BEING PLACED FOR TUNNEL
LINING
RCC LINED TUNNEL WITH WATER FOR CURING
2200mm
Improvement in Secondary Network
Replacement and
Rehabilitation of old
pipelines
A major programme
costing Rs. 356 Crore, to
be implemented over two
years, has been drawn up
for
replacement/rehabilitation
of old pipelines to reduce
leakages and possibility of
contamination. DPR of Rs.
253.47 Crore is prepared
and submitted to the GOI
for availing financial
assistance under the
JNNURM.
Year
2006-07
2007-08
Total
Pipelines
length
length
length
Replacement
221 Km
103 Km
324 Km
Rehabilitation
196 Km
94 Km
290 Km
Total
417 Km
197 Km
614 Km
150
206
356
Expenditure
(Rs. Crores)
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Improvement in Tertiary Network
• In order to reduce leakages and consequent
contamination, the tertiary network is being replaced
/ rehabilitated wherever necessary, under Expert
guidance. Zonal contractors are being appointed for
carrying out the work as suggested by the Consultant
for which a proposal to appoint contractors in six
zones of Mumbai has been submitted to the Standing
Committee.
• Tender process for appointing a reputed Consultant
for Comprehensive Water Supply Distribution
Improvement Programme is currently going on.
Supply Side Management:
Reduction of Operational Costs
Energy Audit
A reputed agency has been appointed for
carrying out energy audit of the complete
system and major pumping stations in water
supply sector in order to identify areas
where energy can be saved.
The Audit Report is submitted in the month
of February ’07 and the recommendations
are being implemented
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