Water Supply Initiatives

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Municipal Corporation of Greater Mumbai

Water Sector Initiatives


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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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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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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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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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Water Supply Initiatives