LYDEC NRW Action Plan - CMI Marseille · 2 "date" LYDEC NRW Action Plan – Mediterranean NRW...
Transcript of LYDEC NRW Action Plan - CMI Marseille · 2 "date" LYDEC NRW Action Plan – Mediterranean NRW...
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LYDEC NRW Action Plan
Serge LESCOUËT
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"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 2
Casablanca in figures
Casablanca:
Population: Around 5 M inhabitants
Network:
Network length: 350 km of primary network 4450 km secondary network
Customers: Around 250 000 connections for 960 000 meters
Volume:
Daily consumption: 450 000 to 650 000 m3/d Storage capacity: 634 330 m3 for 29 reservoirs Pressure zone: 11 zones from 0 to 240 m above sea level (25 to 1200 km) Price of m3 purchased: 4,34 MAD
2011: 186 Mm3 purchased / 141 Mm3 supplied / 45 Mm3 lost
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Start of the first
NRW Action Plan
Increasing of the yield till 2002
Leak detection
Meter replacement
Network renewal
Results maintened and yield remain stil
Start of pressure modulation on 1000 km of network
Hard winter conditions
Yield collapses
NRW Action Plan reinforced
Start of sectorization
Active leakage control
Pressure modulation on 1500 km
Evolution of the yield
October 2012: 75,5%
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CERCLE DES EAUX DISPARUES – Evaluation 2009
Strong actions to reduce physical
losses
Metering losses 5%
Physical losses 17%
Commercial losses 5%
Sales 73%
Total losses in 2009
50 Mm3
NRW Diagnosis
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55 D
85
85 i
110
180 240
153
58
85 nm
96
140
160
82
60
115
55
Flow monitoring
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Flow monitoring
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Pressure > 5 bars: Increase the risk of damaging the network Pressure Modulation on 1500 km
Modulation 2010
Modulation 2011
Modulation 2005 – 2007
Pressure Modulation
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Network before pressure modulation / Peak day 2008 Night Time Nodals Pressure
(m)
20
30
40
50
60
Pressure Model
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Nodals Pressure
(m)
20
30
40
50
60
Network after pressure modulation / Peak day 2008 Night Time
Pressure Model
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20 m 30 m 7 m
Flow before and after: - 100 L/s
Zone 140: Pressure upstream /downstream
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55 D 4000 m3/j
30 L/s
85 m 40000 m3/j
360 L/s
85 i 9000 m3/j
60 L/s
110 23000 m3/j
95 L/s
180 3500 m3/j
30 L/s 240 9000 m3/j
50 L/s
153 1500 m3/j
10 L/s
85 nm 120000 m3/J
380 L/s
96 61000 m3/j
300 L/s
140 13000 m3/j
350 L/s
160 20000 m3/j
80 L/s
82 1200 m3/j
5 L/s
60 23000 m3/j
92 L/s
115
55 9000 m3/j
45 L/s
58 6000 m3/j
200 L/s
Sectorisation – DMZ / DMA
Sectorization 2011
Sectorization 2010
Sectorization 2012
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Etage 96 Zone 2
Zone 2 secteur 1 et 2 Zone 2 Steps
Sectorisation – DMZ / DMA
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Minimum night flow
Ref night flow: 0.2 to 0.8 L/s/km
Read meter
Estimated flow of leak
Minimum Night Flow
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Correlation
Direct listenning
Leak detection
Mobile or permanent prelocation :
Helium tracking :
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GIS viewer for permanent prelocation
New 01/2013
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Knowledge Transfer
Sectorisation: - Design of zones and areas - Measurement: flowmeters and
pressure loggers - Flow monitoring (analysis) - Check water tightness of zones
by pressure drop test - Valve operation for step test
Leak Detection
Geophone Correlator Prelocation Helium tracking
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The flow of water delivered to the network is monitored and followed up every day.
Each night the scada system calculates the minimum night flow of all the distribution zones.
The MNF2012 was reduced by ~ 200 L/s compared with MNF2009, despite the increase of consumption.
Result: Minimum night flow
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Water Meter Test Bench:
2010, Lydec obtains the ISO 17025 Laboratory Accreditation
Each year ~ 30000 meters are replaced following:
- Meter replacement program: age of the meter, brend, tests…
- After meter defect or dysfunction
- Specific replacement program with electro magnetic flow meter on big customer.
Meter replacement
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CIRSEE Research program PE Pipe
" Suez Environnement Research Center (C.I.R.S.E.E) leads a research program on PE Pipe ageing.
" LYDEC participated to this program sending samples to the CIRSEE PE Test Bench and collecting data on field.
Leaking connection diagnosis:
Assessment form: More than 1500 filled (field feedback) Analysis: + de 80% of leaks on LDPE (cracks) Action plan: Replace all connections (different from
HDPE) at first leak
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In 2010, LYDEC built a new laboratory for Pipe Assessment Condition (corrosion, ageing…)
The life expectancy of each pipe is evaluated measuring on sample:
" Thickness of the metallic pipe: Cavitymax (Inside) + Cavitymax (Outside) " Environmental condition (soil,
backfill…)
All the data collected and sample tested are registered in the GIS and allow to plan the pipe renewal program.
Metallic pipe assessment
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GIS: leaks report
GIS is not only a tool for asset management
Important to report data on customers, complains, operations, repairs…
Leaks are reported in the GIS. Very useful for:
" Leak detection " Pipe renewal program
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Commercial losses
The NRW reduction action plan related to commercial losses involves most of the directorate of the company.
All actions are followed up through a committee with indicators and benchmarking: frauds, reading, etc.
Specific actions launched on: " Fire hydrants " Stand pipe (spring) " Watering meters " Big consumers
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Physical losses: Modulation: + 500 km and dynamic control Sectorisation: Full network with permanent monitoring
(120 meter points for av. 50 zones) Leak Detection: Permanent prelocation (400 units)
Helium, hydrophones, Sahara®, SmartBall® on feeders Metering losses: Small meter: 20 000 meter replaced / year Big meter: + 100 Electro Magnetic Flowmeter
Action Plan 2012 – 2015:
Asset management: Assessment: Casablanca Water Master plan Renewal program: 10500 connections / year
45 km of network / year Commercial losses: Reading and billing: focus on violation and defective meter to replace
10 000 meters / year
Action plan management: Aquacircle Forecast, Optiflux, Aquadvance