LYDEC NRW Action Plan

Serge LESCOUËT

"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

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 3

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%

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 4

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

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 5

55 D

85

85 i

110

180

240

153

58

85 nm

96

140

160

82

60

115

55

Flow monitoring

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 6

Flow monitoring

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 7

Pressure > 5 bars: Increase the risk of damaging the network Pressure Modulation on 1500 km

Modulation 2010

Modulation 2011

Modulation 2005 – 2007

Pressure Modulation

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 8

Network before pressure modulation / Peak day 2008 Night Time Nodals

Pressure (m)

20

30

40

50

60

Pressure Model

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 9

Nodals Pressure

(m)

20

30

40

50

60

Network after pressure modulation / Peak day 2008 Night Time

Pressure Model

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 10

20 m 30 m 7 m

Flow before and after: - 100 L/s

Zone 140: Pressure upstream /downstream

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 11

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

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 12

Etage 96 Zone 2

Zone 2 secteur 1 et 2 Zone 2 Steps

Sectorisation – DMZ / DMA

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 13

Minimum night flow

Ref night flow: 0.2 to 0.8 L/s/km

Read meter

Estimated flow of leak

Minimum Night Flow

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 14

Correlation

Direct listenning

Leak detection

Mobile or permanent prelocation :

Helium tracking :

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 15

GIS viewer for permanent prelocation

New 01/2013

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 16

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

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 17

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

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 18

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

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 19

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

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 20

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

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 21

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

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 22

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

"date" LYDEC NRW Action Plan – Mediterranean NRW Workshop – World Bank, Marseille, January 2013 23

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