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Municipal Corporation of Greater Mumbai Water Sector Initiatives

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... 3350 Mld Major Water Treatment Plants: ... Water balance and ... Introduce / upgrade Distribution management tool SCADA IMPROVEMENT IN PRIMARY ... – PowerPoint PPT presentation

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Title: Municipal Corporation of Greater Mumbai Water Sector Initiatives


1
Municipal Corporation of Greater Mumbai Water
Sector Initiatives
2
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

2
3
Customer Care Challenges of Rising Expectations
Numbers
4
Mumbai Water Supply At A Glance
Water Supply 3350 Mld Major Water Treatment
Plants Bhandup Rated capacity 1910
Mld, working at 2100 Mld Panjarapur
Rated capacity 1365 Mld, working at
1365 Mld Vehar Tulsi Rated capacity 90
Mld 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
5
Existing Water Supply Sources
5
6
Sources of Water Supply For Mumbai
Basin wise water sources
UPPER VAITARNA
PINJAL
GARGAI
MIDDLE VAITARNA
LOWER VAITARNA
  • Vaitarna
  • Upper Vaitarna
  • Lower Vaitarna
  • Middle Vaitarna
  • Pinjal
  • Gargai
  • Bhatsa
  • Ulhas
  • Kalu
  • Shai

SHAI
TANSA
BHATSA
KALU
6
7
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 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)

8
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

9
Intermittent System Consumes More Water
  • Consumer taps are usually kept open.
  • There is a tendency to store more water what is
    required.
  • The STALE water is thrown to store FRESH
    water.
  • High peak needs strong network and more capital
    investment.
  • Low pressures increases the coping cost of the
    consumer
  • Leak detection management is difficult.

10
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.

11
Transition from Intermittent to 24X7 Water Supply
Major Water Sector Initiatives
  • Source Augmentation
  • Demand-side Management
  • Supply-side Management

11
12
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
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.
12
13
Demand Supply Scenario
163.8 lakhs
152.99 lakhs
2021
5300
121.94 lakhs
2011
5120
5010
Present Supply 3350 Mld
2001
3800
Demand in Mld
4450
Supply in Mld
2980
Source Dr. Chitale Committee Report
14
Source Augmentation III A Mumbai Water Supply
Project
  • 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.
  • 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

14
15
Middle Vaitarna Water Supply Project
  • 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.
15
16
Middle Vaitarna Project Financing
16
17
Middle Vaitarna Project Time Schedule For
Implementation
17
18
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.
18
19
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.

19
20
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.
  • Water balance and estimation of NRW/UFW
  • Leakage detection, Repairs / Rehabilitation /
    Replacement plan
  • Water balance. If NRW within limits, implement
    24X7 supply
  • Introduce pressure regulating devices for
    equitable distribution
  • 9. Introduce / upgrade Distribution management
    tool SCADA

20
21
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.

22
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 -
  • 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.

23
TUNNEL FROM MAROSHI TO RUPAREL COLLEGE
24
TUNNEL - SHAFT EXCAVATION (Photographs from
earlier works)
25
TBM CUTTER HEAD-FRONT VIEW
26
STEEL LINER PLATES BEING FIXED
Steel Liners
27
LOOSE ROCK FALL ON TBM FRONT PORTION.
28
REINFORCEMENT BEING PLACED FOR TUNNEL LINING
29
RCC LINED TUNNEL WITH WATER FOR CURING
2200mm
30
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.
30
31
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.

32
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
32
33
Thank You
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