canadian utilities learn to fly through benchmarking of water loss management
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Canadian Utilities Learn to Fly through Benchmarking of Water Loss Management. Christine McCormack, P.Eng. September 13 th , 2005. Benchmarking Evolution. Introduction to NWWBI Collecting PM data Comparison of results Water loss management strategies and best practices. - PowerPoint PPT PresentationTRANSCRIPT
A BETTER TOMORROW made possible
Canadian Utilities Learn to Fly through Benchmarking of Water Loss Management
Christine McCormack, P.Eng.
September 13th, 2005
Benchmarking Evolution
• Introduction to NWWBI
• Collecting PM data
• Comparison of results
• Water loss management strategies and best practices
What is Benchmarking?
•How well are we doing?•How well do we comparewith similar organizations?
•Are we getting value for money?•How can we improve?
The Early Days
• Pilot study in 1997 – NRC, four wastewater utilities & Earth Tech
• Determine utility goals
• Ensure apples-to-apples comparison through on-site data collection
• Water Utilities joined in 2001
National Benchmarking
34 Wastewater Utilities
32 Water Utilities
15 Stormwater Utilities1998 1999 2000 2001 2002 2003 2004 2005
0
5
10
15
20
25
30
35
Canadian Utilities
Water Utility Goals
Water Loss in 2001
• “Unaccounted for water”
• Many using PM “% of supply”
• Adopted PM of m³/km/day of UFW
• Leak detection primary strategy
• Relevant to Reliable and Sustainable Goal
2000 UFW m³/km/day
-10
0
10
20
30
40
50T
RA
NS
-1
TR
AN
S-2
TR
AN
S-3
TR
AN
S-4
TR
AN
S-5 B F G P K H O L D C R M T A U N E J S Q
Min 55 L/conn/dayMax 545 L/conn/day
Metric vs Process BM
Metric Benchmarking
ProcessBenchmarking
Identify Performance Gap:•How much•Where•When
Management Commitment
Employee Participation
SUPERIOR PERFORMANCE
How to Close the Gap•Improved Knowledge•Improved Practices•Improved Processes
Water Loss Task Force
• Conference calls
• Breakout session at the Annual Workshop
• Sharing of BPs: IWA Water Balance, InfraGuide, AWWA etc
• Sharing of water loss reduction strategies
Water Loss in 2005
Non-Revenue Water
1. Transmission only systems PM: m³/km/day
2. Distribution & Integrated systems PM: L/connection/day
2003 NRW L/conn/day
-100
0
100
200
300
400
500
600
700
800A B C D E F G H J K L M N O P Q R S T U V W X Y
NR
W (
L/c
on
ne
cti
on
/da
y)
-20%
0%
20%
40%
60%
80%
100%
120%
140%
160%
% o
f S
yst
em M
ete
red
2001 2002 2003 2003 % Metered
Min 105 L/conn/dayMax 655 L/conn/day
2003 NRW & Pipe Age
-100
0
100
200
300
400
500
600
700
800A B C D E F G H J K L M N O P Q R S T U V W X Y
NR
W (
L/c
on
ne
cti
on
/da
y)
-10
0
10
20
30
40
50
60
70
80
% o
f S
yst
em M
ete
red
2003 NRW 2003 Average Pipe Age
Water Loss Reduction Strategies
The InternationalStandard Water Audit
Water Metering, Testingand Replacement
Leak Detection
Pressure Management
Infrastructure Renewal
Bylaw Enforcement &Design Standards
Pricing
SCADA
Distribution SystemModeling
Operation & MaintenancePractices
Water Efficiency /Conservation
District Metered Areas
Public RelationsManagement
Mission: Performance Improvement
• Learn from others
• Validate existing best practices
• Report back on PII at Annual Workshop – solutions, problems, ideas
• Group peer pressure
2005 Workshop - Abbotsford
• Previously had separate fire and domestic line to ICI customers
• New practice – combined domestic and fire line
• Eliminates unauthorized use
• Reduces O&M $
2005 Workshop - Calgary
• Water demand management – reduce per capita demand by 33% by 2032 (no change in total consumption despite 50% growth)
• Temporary DMAs, leak detection, main replacement, meter calibration
2005 Workshop - Peel
• 7 pressure zones
• 124 zone valves to maintain zone integrity = 248 dead end mains
• Flushing required to maintain water quality
• Pressure zone bypass (small pipe and control valve) with minor constant flushing minimizes flushing volumes, reducing NRW and $ but maintaining water quality
Leaks in the Far North
“Victim”
Pipe damage
Benefits of Water Loss BM
• Compare water loss to peers
• Share methodologies for estimating Water Balance components
• Share Canadian experiences with water loss reduction strategies
• Validate best practices by monitoring PM results
Conclusions
• Canadian utilities now have data to manage their water loss
• Water loss management has many strategies and applies to most of the utility goals
• Next steps: Collect ILI data
More information
www.nationalbenchmarking.ca