LYDEC NRW Action Plan Serge LESCOUËT
Casablanca in figures Casablanca: Population:
Around 5 M inhabitants
Network: Network length: Customers:
350 km of primary network 4450 km secondary network Around 250 000 connections for 960 000 meters
Volume: Daily consumption: Storage capacity: Pressure zone: Price of m3 purchased:
450 000 to 650 000 m3/d 634 330 m3 for 29 reservoirs 11 zones from 0 to 240 m above sea level (25 to 1200 km) 4,34 MAD
2011:
186 Mm3 purchased / 141 Mm3 supplied / 45 Mm3 lost
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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
Evolution of the yield
Start of the first
Hard winter conditions
NRW Action Plan
Yield collapses
Increasing of the yield till 2002 October 2012: 75,5% Leak detection Meter replacement Network renewal Results maintened and yield remain stil
Start of pressure
NRW Action Plan reinforced
modulation on 1000 km of network
Start of sectorization Active leakage control Pressure modulation on 1500 km
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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
NRW Diagnosis CERCLE DES EAUX DISPARUES – Evaluation 2009
Total losses in 2009 50 Mm3
Metering losses Commercial losses 5% 5% Physical losses 17%
Strong actions to reduce physical losses
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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
Sales 73%
Flow monitoring
58 82 60
85 i 55 85
96 85 nm
55 D
110
160 153
140 115
180 240
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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
Flow monitoring
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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
Pressure Modulation Pressure > 5 bars: Increase the risk of damaging the network Pressure Modulation on 1500 km
Modulation 2005 – 2007 Modulation 2010 Modulation 2011
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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
Pressure Model Nodals Pressure (m)
Network before pressure modulation / Peak day 2008 Night Time
20 30 40 50 60
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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
Pressure Model Nodals Pressure (m)
Network after pressure modulation / Peak day 2008 Night Time
20 30 40 50 60
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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
Zone 140: Pressure upstream /downstream
20 m
30 m
Flow before and after: - 100 L/s
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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
7m
Sectorisation – DMZ / DMA 58 6000 m3/j 200 L/s
82
1200 m3/j 5 L/s
55 85 m 40000 m3/j 360 L/s
9000 m3/j 45 L/s
110
4000 m3/j 30 L/s
23000 m3/j 95 L/s
115
23000 m3/j 92 L/s
9000 m3/j 60 L/s
96 85 nm
55 D
60
85 i
120000 m3/J 380 L/s
140
61000 m3/j 300 L/s
160 20000 m3/j 80 L/s
13000 m3/j 350 L/s
153 1500 m3/j 10 L/s
180 3500 m3/j 30 L/s
240 9000 m3/j 50 L/s
Sectorization 2010 Sectorization 2011 Sectorization 2012
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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
Sectorisation – DMZ / DMA Zone 2 Steps 1 et 2 Zone 2 secteur
Zone 2 Etage 96
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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
Minimum Night Flow
Estimated flow of leak Minimum night flow
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Read meter Ref night flow: 0.2 to 0.8 L/s/km
LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
Leak detection
Direct listenning Correlation
Helium tracking :
Mobile or permanent prelocation :
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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
GIS viewer for permanent prelocation
New 01/2 013
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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
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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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
Result: Minimum night flow 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.
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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
Meter replacement 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.
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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
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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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
Metallic pipe assessment 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.
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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
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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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
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 22
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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013
Action Plan 2012 – 2015: Physical losses: Modulation: Sectorisation: Leak Detection: Metering losses: Small meter: Big meter: Asset management: Assessment: Renewal program:
+ 500 km and dynamic control Full network with permanent monitoring (120 meter points for av. 50 zones) Permanent prelocation (400 units) Helium, hydrophones, Sahara®, SmartBall® on feeders 20 000 meter replaced / year + 100 Electro Magnetic Flowmeter
Casablanca Water Master plan 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
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LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013