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TO: |
Mayor
and Members of Council |
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FROM: |
Jerry Klaus, General Manager, |
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PREPARED BY: |
Karen Dennison, P. Eng., Manager
System Engineering |
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DATE OF MEETING: |
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SUBJECT: |
Implementation
of Sector Management Areas (SMA) and District Management Areas (DMA) across
the Water System |
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RECOMMENDATION:
THAT
the report entitled “Implementation
of Sector Management Areas (SMA) and District Management Areas (DMA) across the
Water System” be received;
AND
THAT the project be approved as described in the report “Implementation of Sector Management Areas
(SMA) and District Management Areas (DMA) across the Water System”, for
AND
THAT Veritech Consulting Inc. be approved as a single source for provision of
consulting services for the pilot
project component of the overall project entitled “Implementation of Sector Management Areas (SMA) and District
Management Areas (DMA) across the Water System” in the amount of $53,160,
exclusive of GST;
AND
THAT a separate blanket purchase order be issued for contingency in the amount
of $8,000, exclusive of GST, the use of which will be governed by the Expenditure
Control Policy;
AND
THAT the pilot project component be funded from
AND FURTHER
THAT the pilot project be documented in a report to Council in 2006.
The purpose of
this report is to inform Council regarding the strategic direction, purpose, and benefit of
the overall “Implementation of Sector Management Areas (SMA) and District
Management Areas (DMA) across the Water System” project.
To seek approval to
proceed with a pilot project component. To obtain approval to hire Veritech
Consulting Inc. as a single source in the pilot project to provide expert consulting
services.
In 1994,
In 1998, one of the segments of the Region of York’s “Water
for Tomorrow” project was a water audit. The water audit strategy was partially
based on
However, experience from these previous water audit
projects has shown that long term leak elimination and savings can not be
realized through temporary DMA’s. Permanent sectors and districts must be
established with continual monitoring in order to be able to see and respond to
emerging system changes.
The April 2003
GENERAL:
An emerging tool
in optimizing operation of water distribution systems is the use of permanent SMA
and DMA’s. The distribution network is permanently segmented into discrete sectors
and districts where all water inputs
and outputs are continuously monitored in order to obtain net volumetric input
and net daily demand profiles. The main purpose and benefit is that
The basic concept
of this tool is to segment the distribution system into isolated management areas
enabling focus on a specific discrete area. Through monitoring and data
analysis of a specific management area, optimized operation as well as early
recognition of any developing problems can be realized. These management areas
can also be isolated quickly in emergency situations.
The Town of
The establishment
of system wide SMA and DMAs in
Sector Management Areas (SMA’s): will be used to address revenue issues.
SMAs are
permanent, larger management areas (following pressure zone delineations) and having
between 5,000 and 15,000 service connections. SMAs are created without closing system
valves therefore with minimal impact. A SMA is instrumented with meters and
monitoring equipment through system chambers. This instrumentation will allow collection
of specific system data. The primary parameters measured within a SMA are flow
rate and pressure. Various water quality parameters may also be monitored. Sectors
will be utilized in proactively managing the water distribution system on a
larger scale to:
o
Enable
verification of
o
Facilitate
lost revenue recovery through reconciliation of water purchase
(invoiced from Region of
York) and sales (invoiced through
Powerstream).
o
Ensure
water quality through monitoring and optimized system operation.
o
Provide
an early warning detection system for emerging leaks /system problems.
o
Provide
capability to efficiently isolate discrete areas of the Town as part of
emergency preparedness (for example a spill or
backflow situation).
o
Collection
of valuable calibration and demand allocation data for updating of the
system hydraulic model.
o
Detection
of system anomalies (closed valves, excessive demands, low pressure
areas, etc.).
o
Focus
water conservation initiatives. With sector
monitoring the diurnal usage pattern of both residential and commercial, users
can be established. With this pattern,
District Management Areas (DMAs): will be used to address system
distribution issues.
The permanent DMAs
enable very focused management of the distribution system. DMAs are smaller sized management areas with
typically 1,000 to 5,000 connections. They are designed to facilitate water
balance, leak detection, hydraulic model calibration, and demand allocation. In
order to measure flow and other parameters and to minimize the number of meters,
some boundary valves will be required to be closed. Valve closures would be
optimized so that system security, supply, and quality would not be
compromised. This will be accomplished through comprehensive analysis of the
impact of specific valve closures with the system hydraulic model and close interaction
with the Fire Department. Districts will be utilized in proactively managing
the water distribution system on a smaller scale to:
o
Enhance
water quality assurance. Water
movement in the distribution system can be optimized in order to reduce travel
time and possibly enhance water quality in poor DMA’s. This will optimize
current flushing programs by either reducing the number of flushing locations
or reducing the amount of time for flushing.
o
Focused
leakage management within DMA’s. Undertaking four leakage management activities
as depicted in the following diagram to minimize annual real water loss. This will result in improved revenues since
each 1% reduction in water will save $425,000 annually.
Proactive Leak Detection – through continual monitoring of DMA’s for leak properties
(water loss, velocity change, pressure difference, diurnal changes etc.) along
with reported leaks, locate and repair system leakage.
Improved Leak Repair Time - Enhanced awareness of system leakage within a
specific DMA will reduce both main and service leak awareness, locating and
repair time.
Pressure Management – DMA pressure modulation
and flow monitoring will help to establish the benefit of a pressure management
scheme for sustainable control of real water loss. Pressure modulation reduces
the level of background leakage (small weeping leaks) and has potential to
extend infrastructure life due to less system stress.
Infrastructure Management – the data obtained in the management areas will support prioritized
capital programs and system operating decisions.
Revenue Meter Enhancement -
Benchmarking Tool: SMA data collected along with calculations of system
performance indicators will be used to establish leakage management
benchmarking for
Simply reporting
percentage losses for a system is misleading and lacks tools (components) to
reduce the leakage. The model accepted internationally by the International
Water Association includes the calculation of the Water Audit Infrastructure Leakage
Index (ILI) and associated Economic Level of Leakage (ELL). Some water systems
in
Sector water
audits and data inconsistencies revealed through monitoring of night flows will
be investigated to minimize unaccounted for water. The difference between net
water entering a sector and that sold is called non-revenue water. The
following diagram indicates the water balance in a distribution system and
identifies the losses that can be minimized more effectively using the sector
management style approach.
Source: International Water Association
SMA and DMA PILOT
PROJECT:
In order to properly address
implementation of a system wide segmentation of the Town into SMAs and DMAs
with instrumentation for data collection,
Four pilot DMA candidate areas have been selected by
Town
The pilot project
would be operated for 8 months in order to get both summer and rest of year
water use profiles. The overall SMA and DMA implementation strategy will be
revised according to the pilot experience for system wide application.
The Goals of the Pilot Project are:
Ø
To develop
an initial strategy and best practices approach for permanent sector style system
management including suggested parameters to monitor.
Ø
To provide
recommendations and determine cost effectiveness of the implementation and
operation of a system wide SMA and DMA.
Ø
To review
the selected pilot areas for:
o
Impact
on fire fighting capability.
·
SMA’s
will have no impact as no valves will be closed and no dead ends created.
·
DMA’s
have potential for impact but will be investigated thoroughly with the
hydraulic model and the fire department before implementation to prevent
adverse impacts.
Ø
To test
the accuracy and appropriateness of instrumentation types. Recommendations of
appropriate meters (accuracies, costs) to satisfy both low flow (leak
detection) and high flow (billing reconciliation) issues.
Ø
To test
SCADA and remote data acquisition capability.
Ø
To
verify City of
Ø
To collect
SMA data that will be used to calibrate and determine demand allocation for
Ø
To share
data and to interface with other concurrent pilot projects.
o
o
The
City of
Ø
To document
the pilot project and report to council in 2006.
SYSTEM WIDE
(FULL) PROJECT:
The pilot project will provide the strategy,
methodology, equipment and cost projections to implement a system wide SMA
& DMA program. Best practices and pilot project experience as well as recommendations
including City of
The Town will be segmented into SMA’s and DMA’s and
instrumented as required. We expect SMA’s to follow pressure district
boundaries. DMA’s will be established based on system needs and data
requirements without impact on system capacity.
During the development process, new areas should be
designed with SMA and DMA requirements in place. Chamber(s) should be installed
to facilitate management of new areas at the onset in order to minimize the
cost of service impact on customers at a later date. The impact on the
development industry is expected to be minimal as many valve chambers can be
substituted for DMA boundary chambers.
Once fully
implemented, the Town of
o
At
the forefront of the water industry utilizing best practice techniques
specifically designed for
o
Benchmarking
indicators established for measuring system improvement
o
Revenue
reconcilliation
o
Distribution
issues managed such as leakage, pressures, water quality parameters, optimum
system flushing frequency, unauthorized water use etc.
o
Continuous
system monitoring capablity of various parameters for trouble shooting,
operation efficiencies and for an early warning detection system.
CONSULTING
SERVICES:
A consultant will
be engaged to provide expertise during the pilot project by providing a best practices and
industry standards evaluation to guide this project. The consultant will
review the pilot design and assist with analysis
of the data. Recommendations will be made on strategy and implementation of the
system wide sectorization project.
We are recommending single
sourcing the consulting services for the pilot project to Veritech Consulting
Inc. Consultant costs including contingencies will be within $62,000. Assistance
of an expert consultant at this early stage for professional advice is critical
for the success of the overall project. Veritech
Consulting Inc. is considered to be expert in this field (well known and
featured at International Conferences). Veritech Consulting also knows
This pilot project
has been approved in the 2005
The quantum of
the positive contribution toward the Waterworks Net Revenue cannot be
identified at this time. However, as
leaks in the Town’s water system are identified and corrected in a timely and
accurate fashion, savings in terms of lower water losses will be achieved.
Alignment to Corporate Goals
Environmental Focus
Financial Focus
The Fire and
Emergency Services Department was consulted during the preparation of this
report. Their comments and recommendations will be incorporated into the SMA
and DMA design and application. The Fire staff will be consulted during the
project as appropriate.
The Finance
Department was consulted and their comments have been incorporated into this
report.
ATTACHMENTS:
Attachment “A” – Initial Management
Area Location Plan & Pilot Area Location Plan
Attachment “B” – Multi-Year
Project Timeline
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Jerry Klaus, C.E.T., C.M.M. General Manager, |
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Peter Loukes, P. Eng. Director,
Operations and Asset Management |
___________________________________
Jim
Sales
Commissioner,
Community and Fire
Services
Q:\Commission
Share\Operations and Asset Management\Reports\2005\Waterworks\Implementation of
SMA & DMA Report - Oct 2005.doc
