approach & challenges to 24x7 water supply in … 1120-1140 mr k ashok natarajan...approach...
TRANSCRIPT
Presentation by K.Ashok Natarajan, CEO.,
Tamil Nadu Water Investment Company Limited
Approach & Challenges to 24x7 Water supply in Indian Cities
WATER MALAYSIA 2015
Present Scenario
• Absence of documentation on existing network
• Lack of customer data
• Oversized network
• Spaghetti network
• Pipes laid at shallow depths and leaking joints
• High level of non-revenue water
• Poor method of making house service connections
• Lack of bulk meters and customer meters
• Water supply schedule varies from one hour per day
to once in two to three days
• Low water pressure in distribution network
• Risks of contamination into un-pressurized pipes
Unique challenges in India’s Urban
Water Sector
Current Operations
� Utilities don’t exist or are weak
� Operating cost recovery is low
� Current service levels are poor, with water supply intermittent and
often unknown
� Low commercial and staff efficiency
Investment: To serve
current population
� Asset condition is poor and largely unknown
� Non revenue water (NRW) is unknown and often underestimated
� Capital expenditure to rehabilitate network is large and unknown
� Poor hydraulic design of networks
Investment: To serve
future population
� Population growth is high but not clear
� Where population will live is unclear
� Capital expenditure planning is weak and financing sources
uncertain
� Divided responsibility for city and periphery for distribution and
bulk supply
Bhubaneswar
Coimbatore
Population: 480,000
Size: 94 sq km
Water Services: Provided
by state water board,
KUWSDB
Hours of Service: 2 hours
once in 3 days
Cost recovery: 75%
Belgaum
Population: 1.6 million
Size: 106 sq km (old city)
Water Services: Provided
by city municipal
corporation CMC and state
water board, TWAD
Hours of Service: 2-3 hours
every alternate day
Cost recovery: 150%
Population: 840,000
Size: 135 sq km
Water Services: Provided
by state government
department, PHE
Hours of Service: 2
hours/day
Cost recovery: 36.5%
Few Challenges to encounter
Demand forecasting
Design standard evaluation
Pricing & conservation planning
Master planning
Data capture & validation
Data and network analysis
Zone analysis / loss detection
Connection & meter maintenance
Network optimization – rat/zone
Network rehabilitation & expansion
Planning
Studies
Rehabilitation
Demand
management
Data analysis
Field work
Understanding the UtilityAddressing Distribution
Strategy
People &
Processes
Information
Technology
Effective Utility
Management
Planning
Consulting
Works
Understanding the Utility
Holistic Approach
Ideal Framework for Water Distribution
Network
Continuous Pressurised
Water Supply System
Physical and Hydraulic Condition
Assessment
The essentials for preparing design
– Details of Head Works and Reservoirs (Overhead/ Underground sump) in
the corporation.
– Current schematic model of Head Works and Reservoirs.
– Flow from individual Head works and Flow to individual ESR’s
– Flow and Pressure at Ferrule points/ Consumer connections
Flow and Pressure Measurements
• The Flow is to be measured at following locations in the network
• Feeder Main (Outlet Pipe from near Pumping Station)
• Elevated Service Reservoir ( i.e. Inlet and Outlet pipe of the ESR)
• Distribution network i.e. House Service connections, Public fountain
Flow Measurement at Head works & ELSR
Flow Measurement at Consumer End
Flow Measurement at Consumer End
20%
70%
9%
0% 1%
Flows Range at Consumer End
<0.1 l/s <0.5 l/s 1.0 l/s 2.0 l/s 4.0 l/s
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
Flows at Ferrule Points (in lps)
Unequal Flow at
Consumer end are clear
evidences of
inequitable supply
Flow Results at Consumer EndFlow (LPS)
Pressure Measurement at Consumer End
Pressure Measurement at Consumer End
Pressure Measurement at Consumer End
42%
46%
9%
2%1%
Pressure Ranges at Ferrule
Points
<1.0 m <5 m <7 m >7<10 m >10 m
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
Pressure at Ferrule Points (m)
Pressure (m)
Pressure Results at Consumer
End
Level of Delivery point – Consumer End
• Generally the level of delivery point varies between -2.5m to +2.0m
creating enough differences in the distribution system.
0 20 40 60 80 100 120 140 160
-2.5
-2
-1.5
-1
-0.5
0
0.3
0.5
0.6
0.75
1
1.5
2
1
6
14
14
3
149
4
25
1
1
7
1
1
Level of Delivery point from GL- Consumer End
82% - Delivery Point at GL and
Below GL: advantage to
receive water at High pressure
(leading to water shortage at
high contour locations)
18% - Ideal Delivery
Points above GL hence
helps maintain Designed
Pressure
Pipe Condition Assessment Samples
Objectives of 24x7
• To provide to all residents in the selected project area
• 24 hours / day and 7 days a week water supply
• Pressurized water supply system as per CPHEEO guidelines
• Supplying of ample quantity and good quality drinking water
• Implementing state of the art technologies and operational
efficiency
• Better Customer redressal mechanism
• Implementation of customer metering program
• Network operations, maintenance, leakage management and
repairs
• Establish Customer service centers, complaints redressal
• New connections, disconnections, reconnections with approvals
• Network expansion
• Procurement, Supervision & Monitoring
Project Objectives
Can be achieved through,
• Providing Sufficient Water
• An appropriate legal framework
• An appropriate tariff structure
• Consumer awareness & cooperation
• Rehabilitation
• Provision of adequate infrastructure
• Efficient Operation
Providing Sufficient Water
a. Sufficient Water:
augmenting treatment / new sources, savings through
reduction of leakage and wastage
b. Must Know Demand:
consumer type and number geographically distributed,
consumer behaviour, current and projected, large consumers
c. Must allow for leakage and Wastage:
bearing in mind effect on capex and opex
Appropriate Legal Framework
a. Must enable efficient Utility management
b. Meter ownership
Appropriate Tariff Structure
a. Affordable
3% to 5%
b. Must encourage use of meter
e.g. high flat rate, high band widths, allow estimates
c. Must be poor friendly but discourage waste
6000 litres free, only if you consume <15,000 litres, high rate for
excessive use
d. Tariff analysis model
constraints: affordability, aim=cost recovery, used to motivate change
e. Tariff increasesdisassociate with 24x7, important to keep capital costs
down
Consumer Awareness and Co-operation
a. Campaigns
Free Water = No Water
Stop Wastage (stale water, washing, leaking plumbing)
b. Improved Customer Service
revenue collection, applications, enquiries
c. Improved service delivery
Pressure, quality, continuous
d. Gain their trust
correct billing, efficient maintenance
Rehabilitation and Infrastructure
a. As Cheap as possible
b. Commercial Rehabilitation
based on commercial data analysis and commercial field survey
(including sounding)
c. Network Data Validation and Accurate demand analysis as
inputs
d. Condition Assessment
e. Network optimization
Re-zoning (pressure & mass balancing)
Rationalisation of supply to consumers
Spaghetti networks
Spatial analysis (isolating valves, hydrants) correct billing,
efficient maintenance
f. Network Rehabilitation
Based on c & d and material policy
Do not forget valves, hydrants – Leakage will increase
Integrated Water Management Plan:
Salient Features of Arcot Municipality
• NAME OF THE MUNICIPALITY : ARCOT
• AREA OF THE TOWN : 7.84 SQ.KM
• POPULATION OF THE TOWN : 55917 (2011 CENCUS)
• NAME OF THE SOURCE : RIVER PALAR
• NO.OF PUMPS : 2 Nos. (75 HP)
• LENGTH OF PUMPING MAINS : 8KM
• NO. OF OHT’S : 6 (20.40 LL CAPACITY)
• QUANTITY OF WATER PUMPED : 41.00 LL
• LPCD : 80 L
• FREQUENCY : ALTERNATE DAYS(2-3 HRS)
• LENGTH OF D’MAINS : 64.00KM
• NO.OF SUPPLY ZONES : 11 +1(DIRECT)
Need For Water Management Plan at Arcot Municipality
Arcot municipality with 55917 Nos. population receives 4.7 MLD from two sources in River Palar.
Unable to provide daily water supply to all areas in municipality limits with existing water supply
system, mainly because they were not able to fill all the six reservoirs simultaneously while
pumping from the Palar pump station.
This was due to the geographic level difference between each reservoir and inadequate sizing of
the pumping main to achieve adequate pressure to lift the water up to all the reservoirs
simultaneously.
TWIC was approached to develop a Integrated water management plan for the existing
distribution network
To improve the existing water supply in this municipality to achieve continuous and equi-
distribution of water supply to all areas with the available quantity of supply.
Hence the need for water Management plan to achieve the following:
• To provide to all residents in the selected project area Continuous and pressurized water
supply
• Introduce state of the art technologies and operational efficiency
• Network operations control
• Network Rehabilitation and management
Reservoir Management System (RMS)
Overview Screen of RMS for Remote
Monitoring
PFCMD Valve Status, Pressure & Flow
Monitoring screen
Typical PFCMD Control Valve arrangement Flow & Pressure monitoring screen for
Pump Station
Arcot Scada – Overview Screen
Arcot Water Supply System Remote
Monitoring System
Vellore Corporation Water Supply Improvement
Scheme: Salient Details
• NAME OF THE PROJECT AREA : Vellore Corporation
• AREA OF THE TOWN : 87.915 Sq.KM
• NO OF WARDS : 60 Nos.
• NAME OF THE SOURCE : Cauvery River / Pallar River
/Ponnai
• POPULATION OF THE TOWN : 5,04,079 (2011 Census)
• PER CAPITA PER DAY : 38 LPCD
• FREQUENCY : Almost in 5-20 DAYS (For 2-3 HOURS)
• LENGTH OF ROAD : 660.00 KM
• UGSS STATUS IN PROJECT AREA : UGSS implementation is in
progress
Need for the Project
• The existing water supply distribution network now functioning in Vellore Old
Municipal areas are dead old say more than 100 years old.
• Difficult to maintain this existing network system (Factors like old and worn out
pipes, insufficient sizes and Multi distribution lines in some areas etc.,)
• To maintain full pledged Water Supply distribution system without break, it has
been decided to examine and inspect almost all the distribution mains with
service personnel’s consultancy.
• Further the existing distribution network is having uneven water supply to users
particularly on tail ends.
• Also there are certain areas where water supply is more than adequate in the
system.
Existing Vellore Water Supply Schemes
12 Nos of Head Works 18.55 Mld
3 Nos of Well Scheme + Bore wells 5.98 Mld
Total Source 24.53 MLD
Palar River
Name :Old KatpadiCapacity : 2.00LLAV. G.L : 207.505mM.W.L. : 222.505m
Name :Thiruvalluvar NagarCapacity : 1.00LLAV. G.L : 203.20mM.W.L. : 217.74m
Name :Ashok NagarCapacity : 1.00LLAV. G.L : 218.010mM.W.L. : 232.510m
Name : NadumottoorCapacity : 1.00LLAV. G.L : 221.060mM.W.L. : 238.560m
Name : PallikuppamCapacity : 1.00LLAV. G.L : 221.420mM.W.L. : 238.920m
Name : PallikuppamCapacity : 0.50LLAV. G.L : 221.420mM.W.L. : 238.920m
Name : PeriyapudurCapacity : 0.50LLAV. G.L : 227.620mM.W.L. : 242.120m
Ammundipattari H/W
IW
Name : Bharathi NagarCapacity : 4.00LL
Name : VOC ParkCapacity : 2.00LL
Thalaiyarampattu H/W
IW-1
Infiltration Well4 Nos.in River Palar
Location : KarugampathurSump Capacity : 1.20LLAV.G.L. : 215.280mM.W.L. : 215.250mPump Set : 20HP Centrifugal 4000Lpm x 11m
Name : AruganthpoondiCapacity : 6.00LLAV. G.L : 206.250mM.W.L. : 221.750m
Name : SaidapetCapacity : 10.00LLAV. G.L : 216.310mM.W.L. : 231.810m
Name : Tansi Back Side (Kakithapattari SR)Capacity : 2.00LLAV. G.L : 212.990mM.W.L. : 228.490m
Name : Punniyakotti NagarCapacity : 5.00LLAV. G.L : 228.985mM.W.L. : 243.985m
Name : VasanthapuramCapacity : 5.00LLAV. G.L : 210.300mM.W.L. : 225.500m
Karugampathur H/W
Karugampathur H/WInf iltration Well10 Nos.(Existing)
in River PalarName : RangapuramCapacity : 2.00LLAV. G.L : 206.175mM.W.L. : 221.175m
Name : Phase-IIICapacity : 3.00LLAV. G.L : 204.620mM.W.L. : 219.620m
Location : SathuvachariCapacity : 2.50LLAV.G.L. : 203.275mM.W.L. : 207.275mPump Set : 12.5HP-2Nos, 45HP-2Nos 1112Lpm x 23m, 2888Lpmx34m
Name : Cup & Saser GLSR)Capacity : 3.25LLAV. G.L : 221.000mM.W.L. : 222.000m
Name : Raj iv Gandhi NagarCapacity : 4.00LLAV. G.L : 223.400mM.W.L. : 235.400m
SUMP
SUMP
Location : Palar Booster SumpCapacity : 6.00LLAV.G.L. : 206.430mM.W.L. : 209.430m
Ponnai Thengal H/W
Ponnai Thengal H/W
IW
Infiltration WellNear Venkatapuram
Pump Set 4HP-300Lpmx50m
SUMP
SUMP
SumpCapacity : 0.10LL
Name : VenkatapuramCapacity : 1.0LL
Name : Vana NagarCapacity : 0.30LL
Name : Papathiamman Koil StreetCapacity : 0.30LL
Alumelumangapuram H/W
Booster Station
Infiltration Wellin River Palar
Kagithapattarai H/W
Name : Sivakumar Hospital Capacity : 4.00LL
Kagithapattarai H/W
GLSR
Thorapadi Lake
BW-4
TNHB H/W
Shambakkam H/W
Name : P illaiyar koilCapacity : 2.00LL
Name : Kalani Kattu Street Near ChurchCapacity : 3.00LL
Name : MullipalayamCapacity : 0.60LL
Palar River
BW-3 BW-2
IW-2 IW-3 IW-4
IW-5IW-6
IW-1
IW-4
IW-2IW-3
IW-7IW-8
IW-2 IW-3 IW-4IW-1 IW-5 BW-2 BW-1BW-1
SUMP
Location : Thandala KrishnapuramSump Capacity : 2.00LL
Mathi Nagar Sump
COLLECTION
Location : AmmundipattariSump Capacity : 0.50LLAV.G.L. : 221.800mM.W.L. : 222.880mPump Set : 20HP 1300Lpm x 45m
Location : KalinjurSump Capacity : 17.00LL
Name : KalinjurCapacity : 2.50LL
Name : Kalinjur T.P. OfficeCapacity : 6.00LL
Name : ArupumeduCapacity : 1.00LL
Name : Kaliamman Koil StreetCapacity : 1.00LL
Name : KalathumeduCapacity : 1.00LL
Name : Valluvar StreetCapacity : 1.50LL
Name : Venmani MotturCapacity : 1.00LL
Name : Gandhi Nagar WestCapacity : 2.50LL
Name : Gandhi Nagar T.P. OffieCapacity : 0.60LL
Name : Gandhi Nagar EastCapacity : 2.00LL
Thandala Krishnapuram H/W
IW-1 IW-2
SUMP
Location : Pallar Old SumpCapacity : 2.00LL
IW-1 IW-4
SUMP
Location : Rajiv Gandhi NagarCapacity : 2.50LL
SUMP
Location : Tirumani TNHBCapacity : 0.50LL
Name : Shastri NagarCapacity : 12.00LL
Name : Kumarapa NagarCapacity : 1.00LL
Location : Bank ColonyCapacity : 2.00LL
BW-2
BW-3
BW-4
BW-1
SUMP
Location : Palla EdayampattiCapacity : 0.150LL
OTTERI TANK
BW-1
SUMP
BW-2
BW-3BW-4BW-5BW-6
BW-7BW-8 BW-9
BW-10
(10 Bore Well 6 Working)
Location : OtteriCapacity : 1.00LL
Name : Sami Nagar NambirajapuramCapacity : 0.60LL
Name : Indira NagarCapacity : 0.30LL
Name : Gandhi Nagar PoonthotamCapacity : 0.30LL
Name : Gandhi Nagar PoonthotamCapacity : 0.60LL
Name : Virupathipuram Gangai AmmanCapacity : 1.00LL
Name : Palla EdayampattiCapacity : 0.60LL
Anna Kalaiarangam
150 HP
HLR19.00LL
Name : Sankaranpalayam (Krishna Nagar)Capacity : 15.00LL
SUMPVallalar Sump
0.50LL
Name : Vallalar NagarCapacity : 8.00LL
SUMP
IW-2
Location : EravandaduCapacity : 1.00LL
Name : SRM Nagar (Thorapadi)Capacity : 6.00LL
Name : Rajiv Gandhi NagarCapacity : 4.00LL
Name : Ambethkar Nagar (Chinna Allapuram)Capacity : 3.00LL
SUMPLocation : KilmonavurCapacity : 2.50LL
Capacity : 1.0LL
Vellore Scheme Details for Flow Measurement Activity
SUMPTNHB Booster Sump
Capacity: 11.0LL
BW-5BW-6 BW-1BW-7
Name : Bharathiyar NagarCapacity : 10.00LL
IW-1 IW-2
IW-9IW-10
IW-1 IW-5IW-4IW-3IW-2IW-3 IW-5 IW-6 IW-7
Eravankadu H/W
IW-5 IW-6 IW-7 OW-1
SUMP
Location : ThorapadiCapacity : 0.30LL
Name : Hari Om NagarCapacity : 3.25LLAV. G.L :M.W.L. :
SUMP
Phase-IIIOpen Well
Location : Phase-II Nehru NagarCapacity : 3.25LLAV.G.L. :M.W.L. :
Name : S ivakumar Hospital Capacity : 4.00LL
Name : RangapuramCapacity : 2.00LLAV. G.L : 206.175mM.W.L. : 221.175m
Name : Pudiya Arunthathiyar ColonyCapacity : 0.60LL
Name : Postal ColonyCapacity : 1.0LL
Venkatapuram Sump H/W
OW-1
WELLCOLLECTION
WELL
COLLECTIONWELL
Periyapudur SumpCapacity: 0.30LL
Ashok Nagar SumpCapacity: 0.30LL
Katpadi SumpCapacity: 0.30LL
IW-2 IW-3 IW-4IW-1 IW-5
IW
Name : KalinjurCapacity : 2.50LL
Name : Kalinjur T.P. OfficeCapacity : 6.00LL
Gandhi Nagar SumpCapacity: 1.00LL
Name : MGR NagarCapacity : 1.00LL
Name : KiltanpattaraiCapacity : 1.00LL
Kumarappa Nagar SumpCapacity: 0.50LL
VOC Park SumpCapacity: 0.50LL
Name : Nehru ParkCapacity : 3.00LL
Name : Nehru Park SumpCapacity : 0.50LL
Name : Amman NagarCapacity : 1.00LL
IW
Name : Radhakrishnan NagarCapacity : 0.30LL
Name : Maraimalai NagarCapacity : 0.60LL
Name : Kirubanadha variyar NagarCapacity : 0.60LL
Name : Sriram NagarCapacity : 0.60LL
Sarkar ThoppuOW
SUMPLocation : Variyar ValaivuSump Capacity : 0.50LL
Name : Subramanaiya Koil StreetCapacity : 0.20LL Name : Variyar Valliveethi
Capacity : 1.00LL
Name : OC Perumal NagarCapacity : 0.30LL
Name : O.C. Perumal NagarCapacity : 0.60LL
Name : Radhakrishnan NagarCapacity : 0.30LL
Name : Kirubanadha variyar NagarCapacity : 0.60LL
Name : Sriram NagarCapacity : 0.60LL
Name : Maraimalai NagarCapacity : 0.60LL
Name : Muthamiz NagarCapacity : 0.60LL
Variyar Valaivu
Sevur OW
SUMP
Name : Bajanai Koil StreetCapacity : 0.60LL
Name : Indra KudiyiruppuCapacity : 0.10LL
Name : Arunthathiyar ColonyCapacity : 0.10LL
Sevur H/W
SUMPLocation : Pachaiamman KoilSump Capacity : 3.00LL
Location : Shambakkam Bore
SUMPLocation : Raghavendra KoilSump Capacity : 1.00LL
Ariyur Lake
BW-2
BW-1
Name : Ariyur ColonyCapacity : 0.60LL
Name : Gandhi NagarCapacity : 1.00LL
Name : AG NagarCapacity : 0.30LL
Name : Teachers ColonyCapacity : 2.00LL
Name : Chellavour SumpCapacity : 0.50LL
Contour Ranging from 325.00 m to 195.00 m
CHENNAI (NH-46)
SH-207KRISHNAGIRI
Cultivation Lands
Fort Areas
Municipal Boundary
Road
Water Bodies
Contour & Contour Level
L e g e n d :
Reserved Forest /
L e g e n d :
Historical Monuments/
Water Bodies
Hilly Areas
Railway Line
195.00 m
325.00 m240.00 m
230.00 m
A View of Existing Reservoirs
Municipal Boundary
Road
Water Bodies
Existing Zone Boundary
L e g e n d :
Reserved Forest /
L e g e n d :
Historical Monuments/
Water Bodies
Hilly Areas
Railway Line
Cultivation Lands
Fort Areas
Existing ELSR85
Z-01
Z-02
Z-03
Z-04
Z-05
Z-06
Z-07
Z-08
Z-09
Z-11
Z-12
Z-15
Z-14
Z-20
Z-22
Z-16
Z-17
Z-21Z-23
Z-24
Z-26
Z-27
Z-28
Z-29 Z-30
Z-31
Z-33
Z-34
Z-35
Z-38
Z-39Z-40 Z-41
Z-42
Z -43
Z-44
Z-45Z-46
Z-47
Z-49Z-50
Z-52
Z -53
Z-55
Z-56
Z-57
Z-59Z-60
Z-61
Z-62
Z-63
Z-64
Z-65Z-66
Z-67
Z-68Z -69
Z -70
Z -71
Z-72
Z-73
Z-74
Z-75
Z-76
Z-77
Z-78Z-79
Z-80
Z-81Z-82
Z-83
Z -51
Z-84
Z-85
Z-86Z-87
Z-88
Z -90Z-91
Z-92
Z-93
Z -95
Z-96 Z-97
Z-98Z-99
Z-100
Z-101 Z-102
Z-103
Z-104
Z-105
Z-106
Z-107
Z-108Z-111
Z-112Z-113
Z-114
Z-115
Z-116
Z-117
Z-118
Z-119
Z-120Z-121
Z-122Z-123
Z-127
Z-129
Z-130
Z-131Z-132
Z-133
Z-135
Z-136
Z-137
Z-138Z-139
Z-140
Z-142
Z-143
Z -145
Z-124
Z -144
Z-128
Z-150
Z-149
Z-147
Z-36
Z-37
Z-151
Z-55
OTTERITANK
PE
RIY
AER
I
Hillock
Hillock
Hillock
Z-81Z-82
Z-83
Z-84
Z-85
Z-86Z-87
Z-88
Z-90Z-91
Z-93Z-94
Z-95
Z-96 Z-97
Z-98Z-99
Z-100
Z-101 Z-102
Z-103
Z-107
Z-108
Z-109Z-110
Z-111
Z-112Z-113
Z-114
Z-115
Z-116
Z-117
Z-118
Z-149
Z-151
118
97115 114
103
102
112
116
149
91
8190 89
151
88 86
87
85
100 101
99
113
108
107111
98
116
96
93
9594
84
83
82
79
109
A View of Proposed Reservoirs
Existing ELSR
ELSR Details :
Ongoing ELSR (CWSS)
Proposed ELSR01
OTTERITANK
PE
RIY
AER
I
Hillock
Hillock
Hillock
Zone-59
Zone-63
Zone-60
Zone-62
Zone-58Zone-5759
5857
62
60
63
Municipal Boundary
Road
Water Bodies
Proposed Zone Boundary
L e g e n d :
Reserved Forest /
L e g e n d :
Historical Monuments/
Water Bodies
Hilly Areas
Railway Line
Cultivation Lands
Fort Areas
Existing ELSR
05
04
Zone-64
Zone-61
Zone-62
Zone-58Zone-57
Zone-56
Zone-55
Zone-67
Zone-32
Zone-29
Zone-50
Zone-51
Zone-59
Zone-63
Zone-60
Zone-66
Zone-65
Zone-31
Zone-26
Zone-25
Zone-28
Zone-27Zone-24
Zone-48
Z-49
Zone-47
Zone-54 Zone-53
Zone-52
Zone-39
Zone-38
Z-45
Zone-44
Zone-43
Zone-41
Zone-40
Zone-35
Zone-36
Zone-37
Zone-34
Zone-33Zone-30
Zone-15
Zone-17
Zone-16
Zone-22
Zone-23
Zone-21
Zone-8
Zone-20
Zone-46
Zone-42
Zone-14
Zone-10
Zone-13
Zone-18
Zone-2
Zon e-9 Zone-12
Zone-1
Zone-3
Zone-4
Zone-5
Zone-7
Zone-6
Zone-11
Zone-19
Proposed Distribution NetworkThe proposed distribution zones will have 830.672 Km length of water supply distribution network. The total
length of pipe includes 464.825 Km proposed for replacement and 302.431 Km of pipes proposed for extended
areas.
The total length of road is only 818.527 Km as per the actual survey drawings provided by the Vellore
Corporation. Pipe to be laid under this scheme is about 767.256 Km.
Pipes/
Material
Length
(m)
% of
Network
Retained
Pipes63,416 7.63%
AC 14,118 1.70%
CI 12,065 1.45%
GI 229 0.03%
PVC 37,004 4.45%
Replaced
Pipes464,825 55.96%
DI (R) 37,675 4.54%
HDPE (R/) 427,150 51.42%
Proposed
Pipes302,431 36.41%
DI (P) 35,382 4.26%
HDPE (P) 267,049 32.15%
Total Length
(m)830,672 100.00%
AC, 14118, …CI, 12065, 1%PVC, 37004, 4%
DI, 73,057 Km, 9%
HDPE, 694,199 Km, …
Replaced/ ProposedDI/HDPE, 767,256 Km,
93%
Summary of Proposed Network
AC CI GI PVC DI HDPE
Coimbatore Corporation 24x7 Water Supply
System: Salient DetailsName of the Corporation Coimbatore City Municipal Corporation
Area of the Corporation 257.04 sq.km
Census Population as per 2011 1617711
Total no of Wards 100
No. of Water supply Zones Five (5)
Total Nos. of Major Schemes 5 Schemes
Present drawl quantity 257.70 MLD
Name of the Corporation Coimbatore City Municipal Corporation
Total No. of MBR Five (5) nos.
Total no of Service Reservoirs 126 nos. (549.30 LL)
On- going schemes 21 nos. (41.20LL)
Total Length of the Road 2918.00 km
Total Length of Distribution system. 2384.1 km
Total no of Water supply connection 2,66,572
Total no of property Assessment 4,49,039
Erstwhile Corporation & Extended Area
Thudiyalur
Vel
laki
nar
Chinna
Saravanampatti
Vila
nku
richi
Kalapatti
Vadavalli
Veerakeralam
Kuniyamuthur
Goundampalayam
Kurichi
Old Corporation
vedampatti
Sl. No. Name Of The ULB Status Population
(2011)
1 Erstwhile Coimbatore Corporation 10,58,956
2 Kavundampalayam Municipality 89462
3 Kurichi Municipality 125900
4 Kuniamuthur Municipality 95970
5 Chinnavedampatti Town Panchyat 18494
6 Kalapatti Town Panchyat 40270
7 Saravanampatti Town Panchyat 33287
8 Vellakinar Town Panchyat 15398
9 Thudiyalur Town Panchyat 21,004
10 Vadavalli Town Panchyat 39906
11 Veerakeralam Town Panchyat 24065
12 Vilankurichi Town Panchyat 21941
Total 1617711
Need For the Project
• In the year 2010 -2011 the Coimbatore City limits was expanded from
105.60 Sq.km (Erstwhile City) to 257.04 Sq. km by adding Three
Municipalities and Eight Town panchayats.
• The Population of the present corporation area has consistently grown up
to average of 23.22% per decade over the last four decades starting from
1981 to 1991 is 19.9%, 1991 to 2001 is 21.6% and 2001 to 2011 is 28.15%.
• At present, the erstwhile areas of the corporation are supplied with
drinking water at the rate of 135 lpcd for once in two or three days.
• And in respect of the added areas, the drinking water supply is now made
ranging from 40 to 70 lpcd once in 8 to 15 days.
• However, in order to meet the increased water demand for added areas,
fast paced urbanization of Coimbatore and to cater minimum of 135 lpcd
against present 40 lpcd as per CPHEEO standards, it is necessary to augment
the sources for additional water demand.
Population & Demand Calculation
Sl.
No
Description Units WATER DEMAND
Period Year2011 2018 2033 2048
Base Floating Base Floating Base Floating Base Floating
1 2011 Census population Nos. 1617711 242700
2 2018 -Projected Population Nos. 1820700 273200
3 2033- Projected Population Nos. 2396000 359400
4 2048 -Projected Population Nos. 3162500 474400
5Base Water demand @ 135
LPCDMLD 218.39 245.79 323.46 426.94
5Floating Population Water
demand @ 25LPCDMLD 6.07 6.83 8.99 11.86
6 Fire demand MLD 4.022 4.267 4.895 5.624
7 Industrial Demand @10% MLD 21.84 24.58 32.35 42.69
7 Total demand MLD 250.32 281.47 369.69 487.11
8 Losses in distribution @10% MLD 25.03 28.15 36.97 48.71
9 Clear water Requirement MLD 275.35 309.62 406.65 535.83
Population & Demand Calculation
Sl.
No
Description Units WATER DEMAND
Period Year2011 2018 2033 2048
Base Floating Base Floating Base Floating Base Floating
9 Clear water Requirement MLD 275.35 309.62 406.65 535.83
10 Deduction for Existing supply
(i) Siruvani as source MLD 98.32 98.32
(ii) Pillur as source MLD 125.00 125.00
(iii) River Bhavani as source MLD 23.00 23.00
(iv) River Azhiyar as source MLD 9.00 9.00
Total Existing Supply 255.32 255.32 255.32 255.32
Net quantity 20.03 54.29 151.33 280.50
10 Losses in Transmission @1% MLD 0.20 0.54 1.51 2.81
11 MLD 20.23 54.84 152.84 283.31
12 Losses in WTP @3% MLD 0.61 1.65 4.59 8.50
13 MLD 20.83 56.48 157.43 291.81
14 Losses in raw water main@ 1% MLD 0.21 0.56 1.57 2.92
15 Raw water requirement MLD 21.04 57.05 159.00 294.72
16 Gross Requirement MLD 25.00 60.00 160.00 295.00
Proposed Water Supply System
Water SupplyZone - 4
Water SupplyZone - 3
Water SupplyZone - 2
Water SupplyZone - 1
Water SupplyZone - 5
Water SupplyZone - 6
Water SupplyZone - 7
Kuniyamuthur Kurichi
Thudiyalur
Vellakinar
Chinna
Saravanampatti
Vila
nkur
ichi
Kalapatti
Vadavalli
Veerakeralam
Goundampalayam
vedampatti
Old Corporation
Old Corporation
Bharathi Park
Ramakrishnapuram
Karattumedu
Press Enclave
GoundampalayamBooster Station
Old MSR
RamakrishnapuramNew MSR
Tapping Point
Jai NagarProposed Sump
MBR
Proposed MBR
Proposed Water Supply System
Core City Areas
Vellakinar and Chinnavedampatti Areas
Ward No. 32 Ward No. 33 to 36
Ramakrishnapuram MSR2 Nos - 30.0 LL Capacity
Bharathi Park HLR38.87 LL Capacity
Siruvani Scheme
Pillur Scheme Pillur-III Scheme
Chinnavedampatti5.0 LL Capacity Sump Ward No. 28 to 31
Zone-1
Zone-2
Zone-7
Core City Areas
Saravanampatti, Vilankurichi and Kalapatti Areas
Zone-6
Ward No. 26 & 43 Ward No. 27 to 42
98.32 MLD
125.0 MLD
Inter.150.85 MLD
Pillur Scheme
Bhavani Scheme
Siruvani Scheme
Aliyar Scheme
L e g e n d :
Pillur - III Scheme
Interlinking
Ramakrishnapuram MSRto Koundampalayam BS
Pro.Sump at Jai Nagar 11.0 LL Capacity
Ulti 50.85 MLD
Int. 87.56 MLD
Ulti.115.38 MLD
82.
81 M
LD
Ulti .32.57 MLD
Int.
48
.47
MLD
Ulti
.69
.85
MLD
Int. 154.07 MLD
Ulti.203.05 MLD
Int. 10.89MLD
Ulti.14.35 MLD
Int. 30.33MLD
Ulti.39.98 MLD
125
.0 M
LD
Int. 27.34 MLD
Ulti
23
1.3
2 M
LD
Int.
10
9.6
3 M
LD
Ulti 285.65 MLDIncluding Fire and Industiral Demand
Int.4.75 MLD
Ward No. 94 to 100
Kuruchi AreasInt. 37.69 MLD
Ulti.49.67 MLD
Ward No. 87 to 93
Kuniyamuthur Areas
Int. 29.59 MLD
Ulti.38.99 MLD
KuniyamuthurProposed MBR @
Press Enclave
Zone-4 Zone-3
5.2
6 M
LD
4.547 MLD
Aliyar Scheme
4.5 MLD4.5 MLD
9.0 MLD
20.543MLD
29.94 MLD
Int. 27.93 MLD
Ulti.39.91 MLD
Ward No. 16 & 17
Koundampalayam BS @11.0 LL Capacity
Bhavani Scheme
Ward No. 18 & 19
Zone-5
Koundampalayam, Vadavalli,Veerakeralam and Thudiyalur Areas
23.0 MLD
Ward No. 5 to 9
Ward No. 1 to 4
Thudiyalur
Int. 8.945 MLD
Ulti.11.806 MLD
Int. 18.50 MLD
Ulti.31.784 MLDInt. 50.445 MLD
Ulti.66.59 MLD
Interlinking fromRamakrishnapuram MSR
Proposed Sump nearSewage Form Road
Suggested KPI’s- Minimum Performance
Indicators
S.No. Bench Mark Target
1.Household coverage for Water Supply
connections100%
2. Per Capita Water Supply 150 LPCD (minimum)
3. Extent of Metering of Water Connections 100%
4. Extent of Non Revenue Water 20%
5. Continuity of Water Supply 24x7
6. Cost Recovery in Water Supply Services 100%
7. Efficiency in Collection of Charges 97%
8. Efficiency in Redressal of Customer Complaints 95%
9. Quality of Water Supplied 100%
Business Risks in Water Management
• Staffing and Organization – Need for qualified Environment engineers with
experience in Hydraulics , GIS , NRW and Distribution( Not available easily) .
• Not meeting service standards – Penalty for Operators
• Ability to invest and Financially close Concessions contracts- High working
capital intensive with negative cash flows until Normalization
• Excessive meter failures during intermittent supply – Need to provide for
failures in financial model
• Not meeting standards of leakage , quality – Need for Operator partnership
• Not satisfying customer complaints – Need for strong local management
• Capital Investment not executed properly – Need good subcontractors with
construction equipment's as contracts are performance driven .
• Collection efficiency – History of poor performance by Utilities
• Increase in number of new connections – Does not progress as per business
plan the project cash flow will get effected
• Average consumption per Cum is less than assumed – Financial risk and over
capacity problems .
Problems during Execution of 24 x 7
• Opposition from the customers for not having obtained their prior opinion
regarding implementation of 24/7 scheme
• Narrow lanes- Problem in excavation of trenches & laying of pipes
• Lack of information on existing service utilities
• Location of meter & tap-Customer opinion verses Operators obligation
• No provision for complete restoration of roads/gutters after giving House
Service Connections
• Complicated procedures in procurement of goods & hence delay in execution
• Lack of professional contractors in the market
• Availability of quality goods in market-Leads to importing of goods eg Valves,
meters .
• Less time-High target of implementation , Lack of awareness
• Unwillingness of customers to pay bills on volumetric consumption
• Objections from the property owners to lay HSCs
• Electricity problem & subsequent stoppage of bulk water
• Non disconnection of old HSCs -led to high water consumption & billing
• Confusion in boundary demarcation/ hydraulic isolation
Contract Structure: Traditional PPP Models
Won’t workPPP Model Description Why it won’t work
Concession
� Viability gap large and unknown
� Risky to finance and plan investments due to uncertainty
about asset condition.
Conclusion: Private investors won’t sign up since it is too risky,
or will charge high fees or tariffs
Lease Contract
(O&M)
Provide service to
customers to a specified
level, for a given O&M
fee
� Service levels not known
� NRW not known
� Maintenance costs difficult to predict.
Conclusion: Operators won’t sign up since it is too risky, or will
charge high fees or tariffs
Manageme
nt Contract
Provide management
services to the utility for
a fixed management fee
� No utility to manage
� Turnaround longer than 5 years, so can’t deliver sustainable
results in short contract period
� Capex program management needed
� Low private sector commitment
� Hard to have long-term incentives to match nature of
business or make accountable
Conclusion: Governments not convinced of the value from
private operator
Run the business,
finance investments,
bound to service
standards and tariff level
from contract start
Innovative PPP solutions that can respond
to India’s challenges
A. Phased Performance Based Contract
Creation of ULB level utility. Two phases, 7+3
years. Phase I, build utility. Contractor given
management fee and access to capital fund to
meet service target. Incentives for
outperformance.
� Variation 1: Cost Efficiency Model
� Variation 2: Performance Efficiency Model
In Phase II, targets re-negotiated, based on
performance. Best practices , reforms embedded.
B. Joint Venture Partnership
Creation of a new water utility, partly owned by
Government and majority owned by private
investor. New company can access concessional
finance and regulated by contract that
determines performance levels.
Where applicable?
� Low cost recovery
� Room for cost effective
improvements
� Poor financial condition
� Large VG
� Poor service levels
� City wishes to preserve flexibility
of asset ownership
Where applicable?
� High cost recovery
� Fairly strong financial position
� VG can be closed with
concessional finance
� City willing to make long term
commitment
Determines fixed fee
and performance
incentive
State Govt.
Customers
City Water
UtilityAccessible if conditions met
Receives water services Pays tariff
Managing
Company
Creates and manages
water utility
Receives fixed fee and
performance incentive
Fixed 7 year
Capital Fund
Full-service
Management
Service Contract
Value of fund= Cost
of replacing x% of
entire network
National
Govt.
AuditorMonitors households on 24/7
Monitors
guidelines for
access to funds
City Govt.
Provide concessional
funding
Structure of a Phased Performance Based
Contract (7+3 Year Phases)
Source WB
Advantages of Phased Performance Based
Contract
IssueTraditional Management
ContractPhased Performance Based Contract
Build utility Not specified Mandate includes:
- Create utility organization structure and
systems
- Create governance structure
Performance
incentives
Often weak
Numerous targets
Larger than usual.
Focus on providing households with 24*7 service
Use capital efficiency Capex not controlled by
operator
Funds not adequate
No incentives for efficiency
Capex controlled by operator
Large fund provided
Strong incentives to maximize benefits for money
spent
Long-term
sustainability and
private sector
commitment
Contract terms too short
Relationship not expected
to endure
7+3 year phases create:
- Time to do well
- Incentive to do well
Contract renewable
Serve growing
market
Inadequate finance
Little growth prospects
Utility and capex fund scaled to expected growth
Opportunities for 24x7 In India
Presented by K.Ashok Natarajan,
Chief Executive OfficerTamilnadu Water Investment Company Limited
86, Mount Road, Guindy, Chennai 600 032.Tel: +91 044 22351870/71 / Fax: +91 44 22351894 / Mobile: 9840017696
E-mail: [email protected]: www.twic.co.in