Transcript Document

Water Services Training Group
13th Annual Conference
10th September 2009
Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009
Mainstreaming Water Conservation –
The Wexford Experience
Niall McGuigan
Director of Service
Wexford County Council
Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009
Phase 1 (’96 – ’00):
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Ryan Hanley Carl Bro
Survey, map, analyse,
recommend for County at large.
Wexford Town
 mains replacement (MDS)
Gorey Town
 1.6km relined, 14.5km
replaced – 72% UFW
BUT
 We didn’t keep our data up
to date –
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Bursts, extensions etc
Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009
Phase 2+ (2002 – 2008):
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2 Year project (!)
Linked with CIS
Visited Scottish Water
89 DMA’s
150 loggers, 500 bulk meters
on 2,000km pipes
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(now + 7,500 NDU meters)
Telemetry in key locations
ALC
Hydraulic Models: 7/9 Major
Schemes
Mains Rehab Report
2008+: and now we’re funding it from revenue, part of cost of water.
Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009
Slide with photo or graph
Typical CIS map (also Apas, intranet and internet)
Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009
Local Authority Project Team
Project Management
Water Conservation
Ass't Engineer
Water Conservation
Grad. Engineer
CIS
GIS Technician
(WTP C'taker)
CIS Staff
Leakage Tech
(plumber)
Leakage Tech
(plumber)
Team A
Team B
Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009
Permanent Team
EXECUTIVE
ENGINEER
Conservation
Network Mgmt
Quality Monitoring
Water
Conservation,
Telemetry
Officer
Leakage Control
Inspector
(North)
CIS Officer
Leakage Control
Inspector
(South)
Wtr Consv’n & Network Mgmt:
About €0.5m/year, including equipment
maintenance, staff, t&s etc.
Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009
Leak Detection 2005 - 2008
Type of Leak
Public Leaks: Repair by
Private Leaks: Repair by
WCC
Developer/Home Owner
No.
Found
No.
%
No.
Repaired Repaired Found
No.
Repaired
%
Repaired
Consumer Side
178
164
94%
579
536
88%
Mains
1,312
1,280
98%
200
194
97%
Stoptap
610
593
97%
300
263
87%
Supply Side
594
585
98%
103
98
95%
Valve/Hydrant
379
355
97%
95
89
94%
Totals
3,107
3,020
97%
1,277
1,157
91%
Public & Private 4,384
4,177
95%
Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009
UFW 2000 - 2008
Rural Targets?:
0.4 m3/km/hr (0-5y)
0.3
(5-10y)
0.25
(10-20y)
UFW
m3/km/hr
± % from 2000
UFW
% of flow
± % from 2000
E/C Town
1.19
+16%
45
-18%
New Ross Town
0.53
-58%
28
-45%
Gorey/Courtown
0.49
-76%
27
-61%
Wexford Town
0.68
-65%
26
-48%
Gorey Reg.
1.04
+35%
66
0%
Small Schemes
0.47
0%
39
-22%
South West Reg.
0.23
-21%
31
-39%
Fardystown Reg.
0.41
-7%
43
19%
Sow Reg.
0.16
-33%
28
-22%
South East Reg.
0.27
-36%
36
-38%
Averages
0.45
-33%
37
-27%
URBAN
RURAL
Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009
Active Leakage Control Vs “Do Nothing”
WATER DEMAND PROJECTIONS
80000
70000
20,000
m3/day
Demand (m3/day)
60000
50000
40000
30000
20000
10000
ALC
No ALC
0
2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020
Year
Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009
Analysis - Sow (rural)
•Source vols ok
•Poor supply at coast
•Established customers
•Established UFW
•UFW minimal (0.29m3/km/hr)
•Pipe bore ok
•Hydraulic model
•Pipe constraint
•Additional coastal source
•Link to other reg. scheme
•Increase pipe dia
•Not a rehab job
•Good methodology
Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009
E/C
Blackwater
Source
Curracloe
Wexford
Analysis - Gorey Rural
•Huge leakage
•Every joint
•Compound dried out
•Terrible level of service
•Quantified problem
•vfm: joints or pipe?
•Replaced 10km
•Another 5km now critical
•Manoeuvring flows based
on modelling.
Gorey
Courtown
Wellfield Reservoir
Reservoir
Cahore
Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009
Leak Repairs - Mapping
Records used for:
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Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009
Invoicing 3rd parties
Build up database
‘Levels of Service’
Decision making
Prioritising work
Case for mains rehab
Using Leak Records to Build Up a
Case for Pipe Rehab – Gorey Regional
57 bursts
in
4 years
Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009
Network Mgmt - Modelling
7 major schemes modelled.
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Fardystown:
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TW:55m
TWL:75m
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Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009
Eliminated pump
station at Rosslare
Harbour
€12,500/yr electricity
Network Mgmt - Telemetry
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About 90 monitors
8 principal plants
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Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009
Cl resid, pH, Turbidity, NH4,
Pumps, Reservoir levels
etc.
Other key locations
Report to Central Control
Remote monitoring (&
control) by engineers etc
Automatic alarm & dial-out
Operators help evaluate
predetermined responses
Reduces reactive and
precautionary visits
Conservation – Schools & Other
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Leaflets
 To each property, to each NDU.
 Gorey Community School 2004
 24 m3/day
15 m3/day (-38%)
 Cost: €9,000 meters, urinals, push taps, cistern dams
 Saving 3,200 m3/yr = €9,000
 Schools Competition 2008-’09
Get them ready for 2010.
15 schools entered ’08.
Prizes for:
 Lowest av’ge consumption/pupil
 Most reduction in consumption/pupil
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Target commercials with advice?
Regional Network Mgmt?
Rainwater Harvesting?
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Carlow Co Co pilot
69 litres/hd/day, 2 person house
35 – 60% saving?
Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009
Water Conservation & Network Mgmt –
Cost or Saving for Wxd Co Co?
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No ALC: 60,900m3/d in 2006
 Actual: 43,500m3/d in 2006
 Saving: 17,400m3/d
Marginal Cost: 12c/m3
 Annual Opex saving €762,000
 Cost of new 17,400m3/d plant
say €6m. WCC 40%, over 10
years= €240,000/year
 Total Saving Opex + Capex
€1m/year
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Cost of Water Conservation and
Network Mgmt: €0.5m/year
Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009
50000
Demand (m3/d) & No of Connections
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DEMAND Vs CONNECTIONS
45000
m3/d
40000
+12%
35000
10 Yrs
30000
Customers
25000
+57%
20000
Demand m3/day
15000
Domestic Connections
10000
5000
Linear (Domestic
Connections)
0
1996
1998
2000
2002
2004
2006
Linear (Demand m3/day)
Meeting the Challenges of the
Changed Economic Environment
Annual Conference September 2009