8 presentation waterlosses workshop cmi

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