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8/12/2019 Water Supply Initiatives
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Municipal Corporation of Greater Mumbai
Water Sector Initiatives
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2
Water Supply - Key Issues
Issues pertaining to Quantity of waterOverall availability and equitable distribution
Issues pertaining to Quality of WaterContamination due to aging network
Issues pertaining to Cost of Operations and tariffstructure
Issues pertaining to hours of supplyIntermittent supply vs. 24X7 supply
Issues pertaining to unaccounted for waterPhysical as well as revenue losses
Issues pertaining to Customers relationship
management
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Customer CareChallenges of Rising Expectations & Numbers
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4
Water Supp ly: 3350 Mld
Major Water Treatmen t Plants:
Bhandup: Rated capacity 1910 Mld, working at 2100MldPanjarapur: Rated capacity 1365 Mld, working at 1365Mld
Vehar + Tulsi : Rated capacity 90 Mld
Major Pumping stat ions:PisePanjarapurBhandupRaoli
Master Balancing Reservoirs : 2
YewaiBhandup
Service Reservoirs : 26
Length of water mains : 4000 Kms
No. of Distr ibut ion Zones : 109
No. of Leak-detect ion Zones : 615
No. of dai ly operated valves : 800
MumbaiWater Supply At A Glance
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5
Exist ing Water Supp ly 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
Bhatsa
I Mumbai 1981 455 2210
II Mumbai 1989 455 2665
III Mumbai 1996 455 3120
6
III A MUMBAI 2007 350 3470 *
Inclusive of 120MLD En-Route Supply
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6
Sources o f Water Supp ly For Mumbai
Basin w ise water
sources
Vaitarna
Upper Vaitarna
Lower Vaitarna
Middle Vaitarna
Pinjal
Gargai
Bhatsa
Ulhas
Kalu
Shai
MIDDLE
VAITARNA
GARGAI
UPPERVAITARNA
LOWER
VAITARNA
PINJAL
KALU
SHAI
BHATSA
TANSA
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Mumbai Water Supply- Broad Features
Mumbais Current Population : 13 million
Mumbais water supply : 3350 MLD
Non-revenue water : 20-25%
Domestic per capita water availability : 180 lpcd
(excluding 20% leakage & Ind./Com. Demand)
Avg. Hours of Supply : 2 to 4 hours
The per capita water availability in some cities having 24X7 water supply:- London : 150 lpcd
Singapore : 160 lpcd
Kuala Lumpur : 120 lpcd
Paris : 150 lpcd
Phnom-Penh : 45 lpcd
Thus Mumbai has enough water to switch over from the present intermittent patternto 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)
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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
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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 FRESHwater.
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.
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Benefits of 24 x 7 Water Supply
1. Improved public health through reduction of waterpollution.
2. Better system: Demand management by efficientmetering and rationalization of tariff
3. Better leak detection & control measures.
4. Higher consumer satisfaction: willingness to pay moreand 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 itsnegative environmental impact prevented.
9. Overall economic boost: Improved infrastructure attractsIndustry / Commerce.
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Major Water Secto r Init iat ives
Source Augmentat ion
Demand-side Management
Supp ly-side Management
Transition from Intermittent to 24X7 Water Supply
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Source Augmentat ion- Long Term Plan
In the year 1993, the Govt. of Maharashtra appo inted an expert comm ittee under the chairm anship ofDr M A Chitale (Ex-Secretary, Irrigation Dept)for advice on the long term planning fo r augmentation
of water supp ly to Mumbai. The committee recommended development of fol low ing sou rces in
phases
The GoM has accepted the Dr. Chi tale Comm it tee recommend at ions and has
approved al lotment of these so urces. The MCGM has therefore taken u p th e
Middle Vaitarna Projectas an imm ediate addi t ional source of water
supp ly.Simul taneously feasib i l i ty of Gargai and Pinjal Projectsis current ly being
studied and the report o f the Consul tants, M/s Mot Mcd onald & Co. in th is regard
is current ly und er scrut iny.
Sr. Source Basin Yield
No. [MLD]
1 Middle Vaitarna Vaitarna 455
2 Gargai Vaitarna 455
3 Pinjal Vaitarna 865
4 Kalu Ulhas 590
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Demand Supply Scenario
2001
2011
2021
121.94 lakhs
152.99 lakhs
163.8 lakhs
Source: Dr. Chi tale Committee Report
44502980
5300
3800
50105120
Demand in Mld
Supply in Mld
Present Supply 3350 Mld
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Source Augm entat ion
III A Mumbai Water Supply Project
Project based on Bhatsa Dam
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
Present allocation of
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.
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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 theState Rehabilitation Authority
ApprovedProject Cost:Rs.1,329.50 crore
Proposal for
financing under
JNNURM cleared
in February 07 by
the Government
of India.1stinstallment of grant
released.
Middle Vaitarna WaterSupply Project
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Middle Vaitarna Project Financing
MCGM share,
(50%)
Rs.664.75
Crores,
Share of State
Gov.(15%)
Rs.199.43
Crores,
Share of GoI
under
JNNURM(35%)
Rs.465.32
Crores
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Demand/Supply Side Ini t iat ives
Apart from sou rce augmentat ion, the
Corporation is also taking a number ofmeasures on both, the Demand sideas well
as the Supply sideto ensure greater
efficiency and consumer satisfaction.
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Demand Side ini t iat ives
Universal meteringis being introduced to enable the citizens pay as per theirconsumption
Expressions of Interest have been called for short-listing one or more agencies forsupply, installation, operation/maintenance & reading of water meters throughoutMumbai. The agency will be appointed by the end of November 2007.
Telescopic Ratesto encourage conservation of water are proposed to be introduced
after installation of meters on the connections to domestic consumers of plannedbuildings
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 timesProposal 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 begiven 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.
S l Sid i i t i t i
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Supp ly Side ini t iat ives
Comp rehensive Water Supply Distr ibut ion Imp rovement Programmeis
being taken up under the guidance of a reputed Consultant, broadly along the
following lines -
Water Distr ibution 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
plan7. 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.
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Improvement in Secondary Network
A major programme has been taken up for replacement ofTrunk mains / Inlets / Outlets by Tunnels due to aging of pipe
lines, and to avoid leakages -
(i) Replacing Tansa and Vaitarna Mains between Maroshi andRuparel 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.
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TUNNEL FROM MAROSHI TO RUPAREL COLLEGE
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TUNNEL - SHAFT EXCAVATION
(Photographs from earl ier works)
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TBM CUTTER HEAD-FRONT VIEW
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STEEL LINER PLATES BEING FIXED
Steel Liners
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LOOSE ROCK FALL ON TBM FRONT PORTION.
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REINFORCEMENT BEING PLACED FOR TUNNEL
LINING
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RCC LINED TUNNEL WITH WATER FOR CURING
2200mm
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30
Replacement and
Rehabi l i tation o f oldpipel ines
A major programmecosting Rs. 356 Crore, tobe implemented over twoyears, has been drawn up
forreplacement/rehabilitationof old pipelines to reduceleakages and possibility ofcontamination. DPR of Rs.253.47 Crore is preparedand submitted to the GOIfor availing financial
assistance under theJNNURM.
Year
Pipel ines
2006-07
length
2007-08
length
Total
length
Replacement 221 Km 103 Km 324 Km
Rehabi l i tat ion 196 Km 94 Km 290 Km
Total 417 Km 197 Km 614 Km
Expendi ture
(Rs. Cro res)
150 206 356
Improvement in Secondary Network
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Improvement in Tertiary Network
In order to reduce leakages and consequentcontamination, 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 Consultantfor 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 Distr ibuti on
Improvement Programmeis currently going on.
Supp ly Side Management:
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Energy Audit
A reputed agency has been appointed forcarrying out energy audit of the completesystem and major pumping stations in watersupply sector in order to identify areaswhere energy can be saved.
The Audit Report is submitted in the monthof February 07 and the recommendationsare being implemented
Supp ly Side Management:
Reduct ion of Operat ional Costs
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