11 presentation waterlosses workshop cmi

Non-‐Revenue Water Management in Cyprus

Bambos Charalambous Head Technical Services Water Board of Lemesos

Lemesos, Cyprus (unCl October 2012)

Managing Director Hydrocontrol Ltd Lemesos, Cyprus

WORKSHOP Non-‐Revenue Water (NRW) Reduc2on in Urban Water U2li2es

Experiences and Challenges in the Mediterranean Region

Center for Mediterranean Integra2on, Marseille, France

January 22-‐23, 2013

Water Management in Cyprus

2 January 22-‐23, 2013 Center for Mediterranean Integra2on Marseille, France

Recent Water SituaCon in Cyprus   Gradual change in the climate   Substantial decrease in annual rainfall >20%   Reduction in the runoff into the reservoirs > 40%   Periods of low rainfall are becoming more frequent   Demand is continuously increasing   Frequent periods of low or no rainfall :1991-92,1997-2000, 2008-09

  Government forced to apply water restriction measures o  Drastic water cuts in irrigation o  Severe restrictions to domestic water supply

  Add Water to the National Balance: o  Construction of Desalination plants: 60Mm3 (75% of total potable needs)

o  Use of treated effluent in agriculture: 10Mm3 (5% of total irrigation needs)

  Need for water conservation and leakage management

3 January 22-‐23, 2013 Center for Mediterranean Integra2on

Marseille, France

Lifeline from Athens to Lemesos in August 2008: 35.000 m3/day


  Is a conCnuous acCvity   Is an integral part of distribuCon network management

  Is based on a long term strategy

  Is cost effecCve especially in water scarce areas

HOWEVER ITS SUCCESS DEPENDS:

  On commitment and dedicaCon at all levels

  AdopCon of appropriate methodologies and technologies

  Use of appropriate and reliable indicators for benchmarking, such as : litres/service connecCon /day and ILI

NRW Management


Marseille, France

Water Board of Nicosia YEAR % of SIV ILI Lit/conn/day

2007 19.5 2.9 137

2011 23.0 4.3 203 Water Board of Larnaca YEAR % of SIV ILI Lit/conn/day

2007 23.0 2.5 131

2011 27.6 3.3 168

Water Board of Lemesos YEAR % of SIV ILI Lit/conn/day

2007 16.7 1.8 91

2011 23.0 2.8 143

Key Performance Indicators


Network Design and

Development


Major Network Developments Water Board of Lemesos

  1986 - 1990 •  Major expansion of storage and supply network •  Establishment of pressure zones and DMA •  Installation of SCADA system

  1991 -1993 •  Pressure reduction study •  Installation of PRVs in 8 out of 27 DMAs

  1994 - 1995 •  Digitization of all maps of the water distribution system

  1997 - 1998 •  Review of the leakage control activities by external consultant •  Recommendations for the establishment of a leakage management

policy

  1999 - to date •  DMA re-design and pressure management •  Use of advanced technology in DMA monitoring and leak detection •  Adoption of IWA WLTF “best practice” approach to NRW management

Source: WBL


Marseille, France

Key ConsideraCons

DMA categories Small : <1000 properties Medium : 1000 – 3000 properties Large : 3000 – 5000 properties

Factors considered in DMA design   Minimum variation in ground level   Single entry point into the DMA   Well defined DMA boundaries   Area meters correctly sized and located   Apply pressure management   Continuous monitoring

Source: WBL

January 22-‐23, 2013 Center for Mediterranean Integra2on Marseille, France

9

Typical DMA Inlet Chamber

Source: WBL 10 January 22-‐23, 2013 Center for Mediterranean Integra2on

Marseille, France

Monitoring and Data Transfer

PSTN and GSM Network

Dedicated Computer in Control Room

WWW

Data Communication   E-mails / sms sent from each DMA   Alarms sent to Operator’s mobile phone for:

o  High/Low pressure o  High MNF o  No flow o  Low battery status

PROGRAMMABLE CONTROLLERS IN DMAs 11 January 22-‐23, 2013 Center for Mediterranean Integra2on

Marseille, France

Pressure Management

Reduction in:   surges and excess pressures   burst rates and background leakage, cut repair costs   flow rates of all leaks   some components of consumption


Marseille, France

Pipeline and Asset Management   High quality materials / Proper installaCon

  High standard of maintenance

  Pipeline replacement using a decision support system

13 January 22-‐23, 2013

Center for Mediterranean Integra2on Marseille, France

Accurate and Comprehensive Metering the first step in establishing how much water is

produced and/or being used


NRW AcCviCes


Annual Water Balance (m3) (“Top -‐ Down”) Reaching the point of Accountability


Commercial Losses =

Loss of Revenue (valued at retail billing rates)

Commercial Losses ( Apparent losses)

All customers are metered Water theft

o  Theft from hydrants o  Meter by-passes o  Tampering with meters

Meter under- registration o  Improve meter accuracy o  Volumetric meters o  Certified meter test bench

Meter reading errors o  Hand-held devices o  Change meter readers’ routes o  Check zero/low consumption

Accounting errors o  Billing software o  Threshold alarms Source: Rizzo and Cilia, 2005


Physical Losses (Real Losses)


Marseille, France

Speed and Quality of Repairs

Number of Pipes Repaired Response Repair Time

19

712 (34%)

1.169 (55%) Same day

(85%)

Next day (13.5%)

Next two days (1.5%)

January 22-‐23, 2013 Center for Mediterranean Integra2on

Marseille, France

AcCve Leakage Control


Marseille, France

DMA (Sector 2)

AZNP (m) Actual MNF (m³/hr)

Background losses(m³/hr)

Locatable losses (m³/hr)

before after before after before after before after

220 64 32 3,92 2,16 0,63 0,24 1,88 0,51

221 63 36 5,69 3,85 3,39 1,65 0,16 0,07

222 54 28 3,07 2,24 1,53 0,71 0,05 0,03

223 53 29 3,58 2,56 1,70 0,82 0,35 0,20

224 53 29 5,50 2,52 1,68 0,82 2,23 0,11

225 64 34 12,96 9,78 5,42 2,41 4,16 3,99

226 64 34 10,04 6,84 5,62 2,55 0,37 0,24

227 59 38 15,52 10,44 5,91 3,38 5,11 2,56

228 43 39 7,60 7,20 3,42 3,03 0,51 0,50

229 41 36 4,06 3,73 1,13 0,96 2,01 1,85

230 47 40 21,80 18,00 5,57 4,60 9,37 6,54

231 52 42 11,01 7,92 4,63 3,54 2,17 0,18

232 39 32 5,17 4,32 1,32 1,05 2,21 1,63

233 42 33 4,45 3,96 1,48 1,10 1,48 1,37

234 48 38 3,55 2,44 0,32 0,23 2,26 1,24

Total before 117,92 43,75 34,32

Total after 87,96 27,09 21,02

LEAKAGE REDUCTION 30 m3/hr

Annual water saving = 220 000 m3

or € 170 000


Marseille, France

Pressure Management

Reduced Burst Frequency ( Reported Leaks)

Description Number of bursts reported Reduction of leaks Before

(7 months) After

(7 months)

Distribution mains 49 27 45%

Communication pipes 296 178 40%

Location Pressure Reduction Overall reduction in burst incidents

Cyprus (Water Board of Lemesos)

32% 41%

Australia (A.Lambert)

40% 55%

Comparison of Results ANNUAL COST SAVING IN PIPE BURST REPAIRS

€100 000


Marseille, France

Leakage Monitoring

23 January 22-‐23, 2013


DMA Flow and Pressure Monitoring


Marseille, France

PRIORITISE LEAKAGE ACTIVITIES BASED ON ESPB AND ON VALUE

OF WATER SAVED

MNF Analysis


MNF Monitoring


Marseille, France

A L R Crack 7 mm wide on DN150mm AC pipe

A L R

Awareness (A)=2days Location (L)=28days Repair (R)=2days Loss of water=7200 m3

Leak LocaCon and Repair

Three leaks were located and fixed.

Awareness (A)=2days Location (L)=8days Repair (R)=1day

Loss of water=4200m3


TargeCng and Benchmarking


Marseille, France

TargeCng and Benchmarking

Goal Sefng •  IdenCfied areas to be improved •  PrioriCsed most effecCve acCons

Benchmarking (Process and Metric) •  Decided on Key Performance Indicators

•  Checked and compared performance to other uCliCes


Non – Revenue Water Financial PI basic (IWA Level 1, Fi 36)

Drought Years Intermittent

Supply


Marseille, France

Litres / service connecCon / day OperaConal PI for Real Losses basic ( IWA Level 3, Op 24 )

Technical Performance Category: A – pressurised system : average pressure 40 m (Developed Countries) : <100 litres/connection/day

Source: Liemberger,2005

Drought Years Intermittent

Supply

Source: WBL 31 January 22-‐23, 2013


Infrastructure Leakage Index Operational PI for Real Losses Detailed (IWA Level 3, Op 25)

Technical Performance Category: A (ILI 1-2: Excellent – no specific intervention required) (Developed Countries) Source: Liemberger, 2005

Drought Years Intermittent Supply


Marseille, France

DEVELOPED COUNTRIES DEVELOPING COUNTRIES

Cyprus

I L I

33

Source: Seago, McKenzie, Liemberger, Halifax 2005 Total of 146 data from 31 countries

January 22-‐23, 2013 Center for Mediterranean Integra2on

Marseille, France

Intermiient Water Supply


Marseille, France

20 DMAs: 373Km: 45%total

Description Number of reported breaks

2007 2010 %increase

Mains 1/7,14km 1/2,38km 300

Service connections

15,5/1000 connections

29,7/1000 connections 200

35 January 22-‐23, 2013


Significant increase in Total Leakage TOP DOWN

BOTTOM UP

Effects of Intermiient Supply


Year

System Input Volume (m3)

Customer Consumption (m3)

Total Difference Total Difference

2007 12.914.576 0 10.762.043 0

2008 10.655.626 -2.258.950 9.776.466 -985.577

2009 11.735.230 -1.179.346 9.803.206 -958.837

2010 14.568.052 1.653.476 10.634.710 -127.333

System Input Volume Vs ConsumpCon



Marseille, France

Year System Input

Volume Customer ConsumpCon

2007 Before IntermiSent Supply 0%

(base line) 0%

(base line)

2008 IntermiSent Supply -‐17,5% -‐9,2%

2009 IntermiSent Supply -‐9,1% -‐8,9%

2010 AXer IntermiSent Supply +12,8% -‐1,2%

System Input Volume Vs ConsumpCon



Marseille, France

Cost to the Water Board of Lemesos for the 2 years (2008 – 2009) of Intermittent Supply: Loss of revenue:

o  Reduction in sales – cost of water saved: € 300.000

Additional operational expenses: o  Staff overtime for opening / closing valves: € 365.000 o  Repairing additional reported breaks: € 325.000

Additional cost after Continuous Supply was established:

o  Additional leakage (2010 – 2012): € 1.700.000 o  Estimated cost of locating leaks: € 175.000 o  Estimated cost of repairing leaks: € 125.000

Cost of Intermiient Supply


Marseille, France

Thank you Bambos Charalambous Tel.:+35799612109

Email: [email protected] [email protected]


Marseille, France

11 presentation waterlosses workshop cmi

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