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Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009

Water Services Training Group

13
th

Annual Conference

10
th

September 2009


Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009

Prioritising Mains for
Rehabilitation/Replacement



Large Rural Areas

Gerard Gibney

Managing Director

Introduction


Mains Rehabilitation/Replacement
-

Why?



Large Rural Areas



Prioritisation



Key issues for Effective Mains
Rehabilitation/Replacement

Why implement Mains
Rehabilitation/Replacement?


On one hand:


Budgetary Constraints


But:


Water Networks:


Do

Breakdown/Deteriorate


Do

Require Maintenance


Do

Require
Replacement/Rehabilitation


Failure to manage networks based on least life
cycle cost strategies will result in
increased cost

over the
long term
.

Asset Life Time Costs

Replacement Interval (Years)
Annual Cos (€ p.a.)
Replacement Cost
Annual Cost of Replacement

Replacement Interval (Years)
Annual Cos (€ p.a.)
Replacement Cost
Maintenance Cost
Annual Maintenance

Cost


Asset Life Time Costs

Replacement Interval (Years)
Annual Cost (€ p.a.)
Replacement Cost
Maintenance Cost
Whole Life Cost
Whole Life Cost = Cost of Maintenance + Cost of Replacement

Minimum Whole Life Cost

Asset Life Time Costs

Value for Money


In the current economic environment
value for money

is paramount


Targeted Spending
-

Cost Effective


Systematic and structured approach


Asset Management



Most Efficient Repair/rehabilitation:


Planned Repair/Rehabilitation 70
-
80%


Reactive Repairs/Rehabilitation 20
-
30%*

Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009

* Thinking, Getting and Staying Competitive: A Public Sector Handbook, Association of Metropolitan Sewerage Agencies and Asso
cia
tion of Metropolitan Water Agencies, 1998


Asset Management



Initially Asset Management requires the
development of:



Asset Inventories


(CIS
-

a good starting point)



Critical Asset Lists


(For water networks this is a product of Stage 1 and
Stage 2 Works


L6/07)


Stage 3 Water Conservation

vital part of
Asset Management

Internationally
-
What Others are Doing ?


US Projections
-

$100’s bn for water
infrastructure over the next 20 years


Hong Kong
-

$ 2.5 billion Project


UK Water Companies rehabilitated
4,565Km (>1%) of Water Mains in
the 2006
-
2007 period.*


1,489Km Relined*


3,076Km Replaced*


* From “Financial performance and expenditure of the water companies in England


and Wales 2006
-
2007 report” by OFWAT

Case Study



Greater Berlin Water Supply System



West Berlin vs. East Berlin (pre
-
reunification) where systematic
network replacement (circa 1% p.a) had been carried out in West
Berlin but not East Berlin:

Bursts per Km


1991
-
2005 (Systematic replacement of network in East Berlin
circa 1.5% p.a; West Berlin circa 0.65%; OA 0.8
-
1%)

Bursts per Km

Case Study



Greater Berlin Water Supply System


Case Study



Greater Berlin Water Supply System


Bursts per Km

Cast Iron


Notice that 20
-
40 year old cast iron was bursting more
frequently than 50
-
80 year old.

Case Study



Greater Berlin Water Supply System



After studies and
large initial investment

Berlin Water
calculated that the optimum replacement requirement
over 10 years was 0.25% per year (OA 0.375% p.a).

How do we compare ?

Average ILI by Country (Sample Cases)
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
Cyprus
Canada
Australia
New Zealand
Germany
France
England/Wales
Czech Republic
Japan
North America
Chile
South Africa
Ireland (Sample)
Ukraine
Hungary
Italy
Average Infrastructure Leakage Index (ILI)

Irl in an International Context (using Infrastructure Leakage Index (ILI))

Why implement Stage 3?


International Findings:


Netherlands:


Annual Investment




507m (1997) to

341m (2007)



“….
emphasis on quality investments …decisions to replace pipelines are
based on
better information provision

(smart asset management)”
-

Vewin
Water Company, Water Supply Statistics (2007)



SMART ASSET MANAGEMENT


Mains Rehabilitation
-

L6/07


Rehabilitation of
watermains….address different
problems e.g. leakage, security of
supply, quality, flow restriction etc.…..
Water Conservation
is the primary
objective……………
.’



Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009

National Water Conservation Programme


Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009


Stage 1


Stage 2




WSTG Training




Stage 3



Rehabilitation


Commenced

}

Advanced

National Water Conservation Programme - Progress
UFW Summary (%)
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
Dublin Total
Dublin City
Dunlaoighre
Fingal
South Dublin
Wicklow
Bray
Kildare
Carlow
Cavan
Clare
Cork City
Cork County
Donegal
Galway City
Galway County
Kerry
Kildare
Kilkenny
Laois
Leitrim
Limerick City
Limerick County
Longford
Louth
Mayo
Meath
Monaghan
North Tipperary
Offaly
Roscommon
Sligo
South Tipperary
Waterford
Waterford City
Westmeath
Wexford
Wicklow
Suggested Target Level of UFW from NWS (25%)
Average Level of UFW 2008 (44%)
Water Conservation in Ireland

Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009

44%

Extract from WSTG Guidance Manual “Network Management


Leakage Control”

Current Situation In Ireland

-

Volumes of UFW

Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009

UFW Volumes - Urban Vs. Rural
68%
32%
Urban
Rural
Total Rural Production = 710,000 m
3
/day
Total Urban Production = 1,185,000 m
3
/day
Total UFW Volume = 870,000 m
3
/day

Leakage Management

Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009

Pressure Management



Reduce new break
frequencies



Reduce real losses

Demand Management



Consumer metering



Water efficient fixtures



Public awareness

Active Leakage Control



DMA Monitoring



Leak Detection



Leak Repair

Pipeline and Assets
Management



Selection



Installation



Maintenance



Renewal



Replacement

Asset (Network) Size

Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009

Urban Vs. Rural Pipework - Irish Context
20%
80%
Urban
Rural
Total Pipework Length = 44,000 Km
35,200Km
8,800Km
L6/07 Prioritisation Strategy


Rehabilitation Strategy


Current status of Water Conservation
Programme


Identify critical DMAs (Prioritise by DMA)



Rehabilitation Works Proposals


Assessment of mains (Prioritise Mains)


Develop work packages


Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009

Effective Prioritisation of Works

Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009

Information


Key!


Stage 1 & 2 Works


Ongoing


Active Leakage Control


Pressure Management


Demand Management


Data Management Systems


CiS


Leak Repair Database


Telemetry Systems


Non
-
Domestic Metering


Resources


Project Management Team


Leak Detection Teams


Leak Repair


CiS Maintenance


Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009

Information


Key!

-

Rural Water Programme Experience


Challenges in GWS Rural Water Sector


High UFW


Limited Fittings


Stoptaps, Valves


Poor Information


Location, Bursts, Fittings


Limited Resources


Part
-
time caretakers


High Ratio of length of service connections/length of
distribution mains


Shared Service Connections


Advance Works




Installation of Stoptaps; to determine extent of distribution
side and consumer side leakage


Installation of DMA meters and valves; to identify sections of
distribution mains with high leakage



Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009

Information


Key!

-

Rural Water Programme Experience

Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009

0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Galway 6
Mayo 11
Galway 7
Mayo 7
Galway 4
Galway 8
Mayo 9
Mayo 13
Galway 2
Mayo 4
Mayo 12
Mayo 8
Mayo 3
Galway 1
Mayo 5
Mayo 2
Mayo 1
Galway 3
Galway 5
Mayo 6
Mayo 14
Mayo 10
% of Volume Loss
High Consumer Usage
Distribution Losses
Breakdown of UFW on 22 DBO GWS Schemes
Demand
Management

Mains
Rehabilitation

Active Leakage Control + Pressure Management

Effective Prioritisation of Works

Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009

L6/07 Prioritisation Strategy



Prioritise by DMA


Characteristics of Mains


Connections


Structural and Leakage Performance


Water Quality


Hydraulic Performance


Prioritise Mains


Burst Frequency


Leakage


Physical Condition


Soil Corrosivity


Head Loss


Age


Importance


Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009

Mains
25%
Consumer-Side
of Connection
24%
Valve/
Hydrant/Fitting
14%
Supply-Side
of connection
17%
StopTaps
17%
Others
3%
Rehabilitation Strategy Reports
-

Prioritisation of DMA’s

Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009



Rehabilitation Strategy Reports

Prioritisation of DMA’s

Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009



Prioritisation


Sample Counties

-

% UFW

Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009


Based on Countywide Rehabilitation/Replacement Reports and Projects

UFW Volume : Rural Vs. Urban
62%
38%
Rural
Urban
Total Volume of UFW = 77,000m
3
/day
Prioritisation


Sample CO’s % Rehabilitation

Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009


Based on Countywide Rehabilitation/Replacement Reports and Projects

Rehabilitation: Urban Vs. Rural
39%
61%
Rural
Urban
Total Pipe Length = 582 Km
Replacement: 0.8% to 1.1% p.a.

Effective Prioritisation of Works

Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009

Implementation

-
Rehabilitation / Replacement Works

Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009

Detailed
Design

Outline
Design

Site
Investigation

Archaeology
Ecology
Consent
Licence

Construction
Works

Effective Prioritisation of Works

Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009

Value

For


Money

Conclusions/Summary


Information is Key !


Stage 1 & 2


‘Mainstream’


Cost Effective Targeted Spending


Stage 3


Mains Rehabilitation




SMART ASSET MANAGEMENT’





Meeting the Challenges of the
Changed Economic Environment

Annual Conference September 2009


VALUE FOR MONEY