Discovering water poverty links in the Sao Francisco river basin-basic database
WATER LOSS 2010 SAO PAULO, BRAZIL JUNE 6 TO 9, 2010 · 2010-06-17 · WATER LOSS 2010. SAO PAULO,...
Transcript of WATER LOSS 2010 SAO PAULO, BRAZIL JUNE 6 TO 9, 2010 · 2010-06-17 · WATER LOSS 2010. SAO PAULO,...
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WATER LOSS 2010SAO PAULO, BRAZIL
JUNE 6 TO 9, 2010
PAPER TITLE: CASE STUDY – SYABAS NRW LOSSES REDUCTION MASTER PLAN
By
Ir. V SUBRAMANIAM
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State of Selangor and FederalTerritories of Kuala Lumpur andPutraJaya
• Land Area : 8,250 sqkm
• Population Served: 6.9 million
• 24 hour supply (100% servicecoverage in urban areas and99% service coverage in sub-urban areas)
SUPPLY AREA AND STATUS OF WATER SUPPLY
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SELANGOR WATER SUPPLY DEPARTMENT (GOVERNMENT)
CORPORATISED ON 15TH MARCH 2002
SELANGOR WATER MANAGEMENT CORPORATION ( PUAS BERHAD )
PRIVATISED ON 1ST JANUARY 2005
SELANGOR WATER SUPPLY COMPANY PRIVATE LTD ( SYABAS )
( 30-year Concession Period - 01.10.2005 to 31.12.2034 )
PRIVATISATION PROCESS
All Headworks privatised from 1994 to 2000
1 800 88 5252RESPONSIBILITY OF CONCESSION
COMPANIES
DAMTO ENSURE SUFFICIENT RAW WATER AT ALL TIMES
RAW WATER CHANNELLED TO
INTAKE
TREATMENT PLANTFLOCCULATION, COAGULATION & CHEMICAL DOSING TO PRODUCE TREATED WATER
BALANCING RESERVOIRWATER STORED BEFORE DISTRIBUTION
TREATED WATER CHANNELLED TO
BALANCING RESERVOIR
PUMP HOUSEBOOST PRESSURE BEFORE DISTRBUTION
SERVICE RESERVOIRWATER STORED BEFORE DISTRIBUTION
WATER DISTRIBUTED AT
SPECIFIED PRESSURE
WATER DISTRIBUTED TO
CONSUMERS
RESPONSIBILITY OF SYABAS BULK METER
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StateGovernment
FederalGovernment
National Water Services
Commission(Regulator)SYABAS
PNHB : 70%KDEB : 30%
FEDERALGOVT : 1 Golden
Share
PUAS
PNSB
SPLASH
ABASS
Consumers in Selangor, KL &
Putrajaya
Partial Novation Agreement to SYABAS Chief Executive Officer
Services & Operation
Existing staff
100%
WTP Operators
PrivatisationConcession Agreement
SYABAS OPERATING REGIME/REGULATORY FRAMEWORK
Ministry of Energy, Green Technology
and Water Water Services Industry Act (WSIA) 2006 & National Water Services Commission Act 2006
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OPERATIONAL PERFORMANCE HIGHLIGHTS• Distribute treated water to 6.9 million consumers
including factories and commercial buildings inSelangor, Kuala Lumpur & Putrajaya.
• Present Consumer Connections is 1.66 million anaverage increase of 2.5% p.a. from 1.48 millionrecorded in year 2005, comprising 85% domesticconnections and 15% industrial and commercialconnections.
• Current water demand is 4,064 MLD with anaverage growth of 2.0% p.a. over the last 5 years.
• 30.5% supplies for industrial and commercialconsumption and 69.5% supplies for domestic andother purposes.
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ASSET - DISTRIBUTION
• SYABAS maintains 25,060km of water pipesmade of mild steel, ductile iron, asbestos cement,HDPE, uPVC and cast iron of sizes ranging from2200mm to 100mm in diameter.
• 1240 service reservoirs, balancing reservoirs,elevated tanks and suction tanks.
• 451 booster pumping stations.
• 53,878 in-line valves of various types and sizesranging from 120mm to 2200mm.
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WATER LOSS COMPONENT
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NRW CalculationNRW is widely measured in percentage (%) as shown below:
NRW(%) = Qin - Qmetered x (100)
Qin
Where as:Qin = Volume of water supplied within a specific period
Qmetered = Volume of water billed to consumers during the
corresponding period
At SYABAS, International Water Association (IWA) formulaalso used to compute NRW in term of ILI (InfrastructureLeakage Index) and ALI (Apparent Losses Index) asPerformance Indicator for the purpose of analysis.
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• About 6,300 km of old Asbestos Cement pipes more than40 years old susceptible to frequent bursts and leaks;
• Recurring failure at reticulation mains and communicationpipes even in new development areas due to poormaterial and workmanship;
• Inefficient call centre to receive and record reported pipeleaks/bursts or overflows;
• Slow response to reported cases and unnecessary delayduring repair and maintenance works;
• Lack of community programmes to encourage and createthe public awareness to value water and to reportpromptly pipe bursts and leaks;
MAIN CAUSES FOR HIGH NRW LOSSES
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• Inaccurate, incomplete or no records of pipeinterconnectivity in many areas rendering the isolationprocess very tedious to facilitate quick repair especiallyduring major pipe bursts;
• Lack of discipline in meter readings leading to highlevel of estimated bills, reading errors and fraudulentpractice;
• Very limited enforcement against illegal connections;
• More than 300,000 aged meters of more than 7 yearsold with some even older than 18 years contributing tosignificant meter under-registration;
• Large number of non-working or stuck meters.
MAIN CAUSES FOR HIGH NRW LOSSES (cont.)
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NRW MASTER PLAN
Physical Loss Reduction
NRW REDUCTION
Date Target NRW Level
31-12-05 37.78%
31-12-08 27.98%
31-12-11 19.98%
31-12-14 15.48%
31-12-15 15.00%and thereafter Active Leak Detection
(trunk & reticulation mains)
Pipe Replacement - Mains (6,000 km) by end of CA- Comm Pipe (1Million nos) by end of CA
Commercial Loss Reduction
Installation of AMR enabled EM flow meters at large account
Meter Replacement -Age Meters of 7 years & above-Stuck Meters
Enforcement against illegal connections
SCADA & GISPUSPEL
Upgrading of meter reading & billing process
District Metering Zone ( DMZ ) 1,000 zones by end of 2013
Pressure Management Zone ( PMZ )
Monitoring of Reservoir Overflow through SCADA
Quick & Quality repair of leak /burst
Supporting Programs
Hydraulic Modeling
Training & capacity buildingDevelopment of Water Distribution& Management System (WDMS)
Design and specifications for waterinfrastructure in New Developments
NRW MASTER PLAN
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DISTRICTMETERING ZONE (DMZ)
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• Total DMZ established as end of 2009 are as follows:
Year DMZ established (nos.)
Reduction in DMZ volume (mld)
2005 222 114.00
2006 139 68.38
2007 43 29.55
2008 318 104.452009 251 78.22
Total 973 394.60
DISTRICT METERING ZONE (DMZ)
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DMZ METER POINT
DMZ BOUNDARY ZONE
Typical size of DMZ : 1,000 to 1,500 connections or 10km pipe length
DMZ ZONE PLAN
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DMZ METERPOINT CHAMBER
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Pressure Reducing
Valves
Meter
T- pot Strainer
INSTRUMENT INSIDE METERPOINT
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GSM DATA LOGGER – TO LOG AND RECORD FLOW AND PRESSURE PROFILE
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Reduction in physical loss of 349 m3/day
Group Comprising: GB.082 - Kg Baru Ampang [Net flow], PRV.GB.082 - Kg Baru Ampang [Downstream], Produced by Netbase.
02/01/10Sat
01/01/10Fri
31/12/09Thu
30/12/09Wed
29/12/09Tue
28/12/09Mon
27/12/09Sun
26/12/09Sat
25/12/09Fri
24/12/09Thu
23/12/09Wed
22/12/09Tue
21/12/09Mon
20/12/09Sun
19/12/09Sat
18/12/09Fri
17/12/09Thu
16/12/09Wed
15/12/09Tue
14/12/09Mon
13/12/09Sun
12/12/09Sat
11/12/09Fri
10/12/09Thu
Flow
: (l/
s)
200
190
180
170
160
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
Pressure : (m)
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
0
Baseline 1
Maximum Pressure = 34mH
Total Daily Flow = 5,364 m3/day
Minimum Night Flow = 51.9 l/s
Baseline 2
Maximum Pressure = 22mH
Total Daily Flow = 5,015 m3/day
Minimum Night Flow = 43.2 l/s
leaks found and repaired
Pressure Reduction
DMZ GB.082 Kg Baru Ampang
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PRESSURE MANAGEMENTZONE (PMZ)
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• Similar to DMZ but in smaller scale encompassing 250 to 500 connections or 5 km of pipe length.
• Primarily for reducing pipe burst frequency.
• Critical areas not economically viable to set up DMZ
• Reduction of OPEX in term of burst repair.
• Contribution to leakage savings although not as much as DMZ
PRESSURE MANAGEMENT ZONE (PMZ)
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Pressure Management Zone at Rawang Tin
30/11/09Mon
29/11/09Sun
28/11/09Sat
27/11/09Fri
26/11/09Thu
25/11/09Wed
24/11/09Tue
23/11/09Mon
22/11/09Sun
21/11/09Sat
20/11/09Fri
19/11/09Thu
18/11/09Wed
17/11/09Tue
Flow
: (m
³/d)
800
750
700
650
600
550
500
450
400
350
300
250
200
150
100
50
0
Pressure : (m)
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
0
Capped Pressure = 15 mH (red profile)
Initial Pressure = 38 mH (red profile)
Capped Pressure = 15 mH (red profile)
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FURTHER REDUCTION USING TIMER AND FLOW
MODULATOR AT PRV
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• During night time, pressure increases due to low demand leading to higher background leakage.
• Electronic devices installed at selected DMZ/PMZ to further control Minimum Night Flow (MNF).
1) Timer
- Common technique.
- Can be programmed between day and night.
2) Flow modulator
- More sophisticated.
- Regulate the downstream pressure based on demand flow into DMZ/PMZ.
Further Reduction Using Timer and Flow Modulator at PRV
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MNF without flow modulator Reduction in MNF with flow
modulator
Pressure is maximum at low flow during night time.
Pressure is propotional reduce accordance to low flow demand
Flow and Pressure profile for DMZ installed with flow modulator at PRV
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DMZ profile without flow modulator.
Average TDF = 1,650m3/dayDMZ profile with flow modulator
Average TDF = 1,356 m3/day
Comparison profile of flow and pressure after flow modulator installation
Further reduction in background leakage = 294 m3/day
06/02/09Fri
05/02/09Thu
04/02/09Wed
03/02/09Tue
02/02/09Mon
01/02/09Sun
31/01/09Sat
30/01/09Fri
Flow
: (l/
s)
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Pressure : (m)
13.51312.51211.51110.5109.59
8.587.576.565.554.543.53
2.521.510.50
29/01/09Thu
28/01/09Wed
27/01/09Tue
26/01/09Mon
25/01/09Sun
24/01/09Sat
23/01/09Fri
22/01/09Thu
Flow
: (l/
s)
29282726252423222120191817161514131211109876543210
Pressure : (m)
14.51413.51312.51211.51110.5109.598.587.576.565.554.543.532.521.510.50
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ACTIVE LEAK DETECTION (ALD)
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• Conducted during night time between 2.00am to4.00am when pressure is high and leak noise could beheard and detected easily.
• Mechanical listening stick and electronic leak noisecorrelator are used to locate invisible leaks.
• Apart from trunk and reticulation mains, ALD is alsocarried out to detect leak or burst within DMZ/PMZ withincreasing Total Daily Flow (TDF) and Minimum NightFlow (MNF).
ACTIVE LEAK DETECTION (ALD)
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Visual and sounding activities to detect leak at communication pipe
Sounding at meter stand Leak sounding at communication pipe
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Leak sounding activities was carried out during period from 2.00am to 4.00am
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RESERVOIR LEVEL AND OVERFLOW MONITORING
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• More than 1,200 reservoirs within SYABAS.
• Depth transducers and sensor loggers installed at major reservoirs .
• SCADA system also being developed to monitor reservoir level and pumping operation.
• Operation Command Centre on 24 x 7.
RESERVOIR LEVEL AND OVERFLOW MONITORING
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Overflow detected
Suspected Overflow from 4:30am to 7:00am
Period of overflow between 4.00am to 7.00am
Reservoir overflow profile
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SCADA System at Command Centre
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• 812 km AC mains replaced.
• 39,000 communication pipes replaced
• 329 reservoir inlet control valves repaired/replaced.
• 730,000 aged and stuck consumer meters replaced.
• 450 EM flow meters installed for large industrialconsumers.
• 15,600 cases of reported illegal connectionsinvestigated and enforcement action taken on 2,290cases.
Other Major NRW Reduction Programmes Implemented
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24 x 7 CUSTOMER SERVICE and TOLL FREE CALL CENTRE
Lucky Draw Prize Giving Ceremony
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QUICK AND QUALITY PIPE BURST AND LEAK RESPONSE
Average time taken to respond and repair pipe bursts under SYABAS:
Size (inch)
Maximum (hrs)
Minimum (hrs)
Average (hrs)
4 12.00 1.50 4.50
6 11.50 1.25 5.00
8 8.50 1.00 5.25
10 9.50 3.50 5.50
12 8.00 4.00 5.50
18 12.00 6.00 8.00
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Legend:WL = Water Loses ILI = Infrastructure Leakage Index (Physical Losses) Ave P = Average Pressure (Ratio of CARL to UARL)CARL = Current Annual Real Losses ALI = Apparent Losses Index (Apparent Losses)UARL = Unavoidable Annual Real LossesUAC = Unbilled Authorized ConsumptionDsty = Density (connection per km)
RESULTS AND ACHIEVEMENT
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NRW REDUCTION PERFORMANCE (JAN 2005 TILL 30 APRIL 2010)
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THANK YOU