Water Conservation and Water
Demand Management
Progress with the Strategy
Implementation
16 September 2010
Background
background
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
WC /WDM Strategy
– CCT commitment to implementation
• CCT 1st metro in SA to develop and implement
• CCT only metro in SA with fully dedicated team for
WDM
– 10 year plan (2006-2016)
– 5 specific goals
– Wants to save 90 million m3/a by 2016/17
– Critical component of WC Water Supply Scheme
– DWA wants to know
Way
Forward
Background
background
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
Way
Forward
CCT made an undertaking (pg 68 of Strategy document)
“CCT will commit over the next five years to implementing and
monitoring a comprehensive WC/WDM strategy. In such a time
no decision should be taken regarding any further water
augmentation scheme in order to verify the full potential of
WC/WDM. After five years the full impact and potential of the
WC/WDM must be clearly demonstrated by CCT and reevaluated. All assumptions made in the current analysis on
the role of WC/WDM will be tested and adequately
researched.”
This report reflects the pro-active
approach of CCT in monitoring and
re-evaluating the strategy after 3
years of implementation
Background
background
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
5 Strategy Goals
Action Plan
Implement
ation
Goal
Target
A
NRW<15% by 2010
Quantitative
B
Wastage < 2% of demand
Quantitative
E
Demand growth < 1%
Quantitative
C
Ongoing effective
management systems and
implementation of IWRP
D
Adoption of strategy as key
deliverable for CCT
Qualitative
Qualitative
Way
Forward
Progress Summary
background
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
Way
Forward
Why measure progress?
• Need to measure impact on WDM
• DWA – if only achieving 50% success then will
need new augmentation by 2015
• If not achieving need to understand why not
• Need to know if re-alignment of Strategy is
needed
Progress Summary
background
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
Way
Forward
What has been done?
o Pressure management successful in 13 settlements
including pressure reduction devices for 49 schools
o1693 consumer meters audited
o1775 meters fitted with automated meter reading devices
o20 574 consumer meters replaced
o17 998 consumer meters re-located & fixed
o70 652 water connection leaks fixed
oAdded 95 more treated effluent users which accounts for
80.5Ml/d of treated effluent use.
Progress Summary
background
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
What has been done? (cont)
– More than 50 000 households visited with Integrated Leaks
Repair Project
– 341 Caretakers trained to date
– 41 Schools visited and leaks repaired
– 160 Hlonipha Amanzi workshops with 14 813 participants
– Water By-laws awareness campaigning – 5 workshops, 12
shopping mall promotions, Industry and commerce
interventions
Way
Forward
Budget & Expenditure
Progress
Summary
background
160,000
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
WC/WDM Strategy - Budget, Budget Revisions & Actual
Expenditure
140,000
120,000
(R000's)
100,000
80,000
60,000
40,000
20,000
0
2007/8
2008/9 2009/10 2010/11 2011/12 2012/13 2013/14 2014/15 2015/16 2016/2017
Original Budget in Strategy
Amended Budget
Actual Expenditure
Way
Forward
Budget & Expenditure
Progress
Summary
background
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Way
Forward
Conclusion
WC/WDM 10 Year Strategy
Cumulative Budget and Expenditure
800,000
700,000
500,000
400,000
300,000
200,000
Amended Budget
Original Budget
Actual Expenditure
2016/2017
2015/16
2014/15
2013/14
2012/13
2011/12
2010/11
2009/10
0
2008/9
100,000
2007/8
R (000's)
600,000
Budget & Expenditure
Progress
Summary
background
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Way
Forward
Conclusion
60
140000
50
120000
80000
30
60000
20
40000
10
20000
Expected Savings (Ml/d)
Original Budget
2016/2017
2015/16
2014/15
2013/14
2012/13
2011/12
2010/11
2009/10
0
2008/9
0
Amended Budget
R 000's
100000
40
2007/8
Ml/day
WC/WDM Strategy Budget and Anticipated Water Savings
To answer the question
one needs to do an
assessment of water
savings and growth
projections
Savings Realised
background
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
Way
Forward
Impact of the Strategy depends on:
1. The actual savings realised through the Strategy
Including abating demand growth
2. Unconstrained growth in water demand
What demand would have been if we have
done
Savings Realised
background
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Way
Forward
Conclusion
Expected vs. Reported Savings
Expected Savings (Ml/d)
Reported Savings (cumulative)
2016/2017
2015/16
2014/15
2013/14
2012/13
2011/12
2010/11
2009/10
2008/9
350
300
250
200
150
100
50
0
2007/8
Ml/day
(cumulative)
Conservative Assessment (only savings from Goal A and E)
2029/2030
2027/2028
Conclusion
2025/2026
2023/2024
600
2021/2022
Targets
Achieved
2019/2020
2017/2018
2015/2016
Demand
Projections
2013/2014
200
2011/2012
2009/2010
2007/2008
2005/2006
Savings
Realised
2003/2004
2001/2002
700
1999/2000
Budget &
Expenditure
1997/1998
1995/1996
1993/1994
1991/1992
Progress
Summary
1989/1990
300
1987/1988
400
1985/1986
background
1983/1984
1981/1982
1979/1980
1977/1978
Mm3/a
Demand Projections
Way
Forward
900
Water Demand Projection versus Actual Demand
800
"Do nothing" scenario
HWR
500
Actual
Demand
LWR
100
0
Demand Projections
background
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
Way
Forward
WC/WDM Strategy Table 10-6
Impact of WC/WDM
No WC/WDM
Sustaining efficiency from
restrictions
10 yr WC/WDM Strategy
Year new supply
augmentation will be
needed
LWR
HWR
2016
2008
2020
2013
2051
2026
Demand Projections
background
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
Way
Forward
Reported Demand Growth Rate on Bulk Water Treated
5.0%
4.5%
4.0%
3.5%
3.0%
average annual growth in demand
2.5%
2.0%
1.5%
1.0%
2006/2007
2007/2008
2008/2009
2009/2010
Demand Projections
Progress
Summary
background
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Way
Forward
Conclusion
Demand Projection without WDM measures
360
350
no WDM Strategy
implementation
4.75% growth p.a.
HWR
Mm3/a
340
330
320
310
300
Actual
LWR
290
280
2006/2007
2007/2008
2008/2009
2009/2010
Achievement of Targets
background
Progress
Summary
Action Plan
Implementation
Goal
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Target
A
NRW<15% by 2010
B
Wastage < 2% of demand
E
Demand growth < 1%
C
Ongoing effective management systems
and implementation of IWRP
D
Adoption of strategy as key deliverable
for CCT
Conclusion
Way
Forward
Actual (2008/9)
25.37%
Cannot measure
Average annual demand
growth for v 3 yrs is
2.98%
For 2009/10 – 1.65%
Qualitative
Qualitative
Achievement of Targets: Goal A-NRW
Progress
Summary
background
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
Way
Forward
% of bulk water treated
30%
25%
20%
15%
10%
5%
0%
2006/7
2007/8
Bulk NRW
Reticulation NRW
2008/9
Overall NRW
2009/10
Achievement of Targets: Goal A-NRW
background
Progress
Summary
Year
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
Bulk NRW Reticulation NRW Overall NRW
As % of bulk water treated
2006/7
3.59%
15.77%
19.36%
2007/8
7.58%
12.64%
20.22%
2008/9
6.89%
16.42%
23.30%
2009/10
8.19%
17.17%
25.37%
Way
Forward
Authorised Consumption
717.25 Ml/d
Water Losses
189.78 Ml/d
System Volume Input 907.02 Ml/d
IWA Balance 2009/10: Units Ml/day
Billed
Authorised
Consumption
676.92Ml/d
Unbilled
Authorised
Consumption
40.33Ml/d
Apparent
Losses
83.84 Ml/d
Billed Metered
676.92 Ml/d
Billed Unmetered
0 Ml/d
Potential
Revenue
Water
552.02
Recovered
Revenue
Non-Payment
Unbilled metered
7.98 Ml/d
Unbilled
unmetered
32.44Ml/d
Unauthorised
consumption
9.59 Ml/d
Customer Meter
Inaccuracies
74.25 Ml/d
Leakage on mains
Real Losses
105.94 Ml/d
Free Basic Water
Leakage on
storage tanks
Leakage on
service conn.
Non-Revenue Water
230.1 Ml/d
Achievement of Targets: Goal A-NRW
background
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
Way
Forward
100
90
80
70
60
50
40
30
20
10
0
Expected Savings
2016/2017
2015/2016
2014/15
2013/14
2012/13
2011/12
2010/11
2009/10
2008/9
CCT Reported Savings
Achieved
2007/08
Ml/day
Expected and Reported Savings - Goal A
Achievement of Targets: Goal B-Wastage
background
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
Reducing wastage to less than 2% of
demand
No data to measure savings…
Way
Forward
Achievement of Targets: Goal E-Reducing Growth Rate
Progress
Summary
background
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
Expected and Reported Savings - Goal E
70
60
40
Expected Savings
30
20
Reported Savings
Achieved
10
2016/2017
2015/2016
2014/15
2013/14
2012/13
2011/12
2010/11
2009/10
2008/9
0
2007/08
Ml/day
50
Way
Forward
Achievement of Targets: Goals C & D
background
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
Way
Forward
Qualitative targets requiring a qualitative
assessment
Achievement of Targets
background
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
Way
Forward
Most significant findings:
• Population growth rate used might be too
low (1.61% (CCT) vs. 3.49% (StatsSA)
• Use of uniform cost for unit leakage can be
improved
Achievement of Targets
Progress
Summary
Ml/day
background
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
950
900
850
800
750
700
650
600
550
500
2006/7
Conclusion
Way
Forward
water billed
Bulk Water
Treated
water supplied to
reticulation
Discharge to Sewer
System
2007/8
2008/9
2009/10
Conclusion
background
•
•
•
•
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
Way
Forward
CCT has done what the Strategy said and more in
the past three years and needs to continue with
similar monitoring and evaluation processes.
As expected significant savings have realised and
projects and actions re WC/WDM need to continue
with even more resources committed.
Concern identified– demand growth still higher
than expected
2 questions that need answers:
Conclusion
background
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
“Yes”, on the savings that
have been verified and
“possibly” on savings yet
to be verified
Way
Forward
Conclusion
background
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
Way
Forward
“YES” if the strategy is realigned and even more
support is given to achieve this
Way Forward – 5 Steps
background
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
• STEP 1: Accuracy of bulk meters needs to be
verified and confidence intervals given
• STEP 2: Report NRW according to IWA Water
Balance. Improve accuracy of estimated
components of the IWA water balance
• STEP 3: Understand why the growth rate in
potable water demand so much higher than
expected. Define (and quantify if possible)
parameters influencing demand growth.
Way
Forward
Way Forward – 5 Steps
background
Progress
Summary
Budget &
Expenditure
Savings
Realised
Demand
Projections
Targets
Achieved
Conclusion
Way
Forward
• STEP 4: Revise projected growth demand and realign strategy targeted savings. Involves extensive
resource planning . Do cost-benefit model that
answers augmentation planning objectives
optimising cost-benefit options. Revise the current
method of unit demand reduction for unit cost.
• STEP 5: Establish annual independent monitoring
and assessment of strategy target achievements,
and align it with the DWA toolkit
THANK YOU!
ANY QUESTIONS?