Post on 09-Aug-2020
Budapest Waterworks experience in Management of Water Losses
Evelin Madzin, László Varga
Budapest Waterworks, Hungary
CONTENT:1. Company introduction2. Value of NRW and other indicatiors at BWW3. Active leakage control activity at BWW4. DMA’s and case studies5. Pressure management and case studies6. Commercial losses
customer profile7. Commercial losses
Water meter selector program8. Commercial losses
Illegal connection9. Summary10. Contact Details
Key Indicators of Budapest Waterworks
• 5 363 km water network
• 231 246 house connections
• 1 million m3 daily capacity
• 756 wells
• 2 water treatment plants
• 593 km sewer network
• 98 million m3/year treatment
• 370 000 m3 daily capacity
• 7 wastewater treatment plants
Drinking water Sewage
• 2 426 000 population served
Clients Revenue
137 million USD revenue*, of which:
• 87 million USD potable water
• 30 million USD wastewater
• 20 million USD export and other* 2018
Value of Non Revenue Water at Budapest Waterworks
International indicators of NRW –ILI and ELL
Technical based index:
Economical based index:
ELL = 14 %
Target: NRW: 15,5 % 14%
Reduction of Physical losses
196
The four components of the reduction of real losses
Active Leakage Controll activity at BWW
Network
monitoring
Minimum night-flow
measurement
District Metered
Areas
Pre-
Locating
Leak noise
logger
Contact
microphone
Pinpointing
CorrelatorGround
microphone
Network monitoring – District metered areas
20/4
20/15
20/13
20/1420/6-7
1/3
1/2
1/1
20/8-9 20/10
20/920/W
20/20
20/19
20/18
20/2320/21
20/11
20/GH
20/AGGL
20/16
154 pcs measurement points
20/4
20/15
20/13
20/1420/6-7
1/3
1/2
1/1
20/8-9 20/10
20/920/W
20/20
20/19
20/18
20/2320/21
20/11
20/GH
20/AGGL
Measuring the water flowing into
and out of the DMA.
Minimum night flow of the DMA
Concluse from leakages
47 pcs districts
Priorization of areas
Data analysis - Case study 1
0%
20%
40%
60%
80%
100%
Daily consumption profile of different zones
Zone no. 24 Zone no. 9 Zone no. 16
Hours of a day
Re
lati
veco
nsu
mp
tio
no
f th
ezo
ne
s(%
)
Zone no. 18
Data analysis - Case study 2
0
10
20
30
40
50
60
70
21-12-2017 31-12-2017 10-01-2018 20-01-2018 30-01-2018 09-02-2018 19-02-2018 01-03-2018 11-03-2018 21-03-2018
Inp
ut
of
the
dis
tric
t (m
3/h
)
Consumption profile of District No. 14/1
Date
1 st repairing 2 nd repairing
Daily average
Night average(1:00-3:30 a.m.)
Data analysis - Case study 3
Min. night flow: 1,5 m3/h
at pipebreak time
Min. night flow: 21,2 m3/h
at start repairing time
EVOLUTION OF A PIPEBREAK
FAILURES’ LIFETIME CAN BE REDUCED TO 1:50 RATE –
FROM 1 YEAR TO 1 WEEK
Reduction of Physical losses
The four components of the reduction of real losses
Pressure management - Targets
• Regulatory compliance (service level of the
pressure between 1,5-6 bar
• Less water flow out of pipe leakage
• Reduction of the number of pipe breaks
• Reducing energy used by the pump houses
of distribution network’s
Pressure management – Results 1
- Bulk water inlet point
- High water tarif
- Pressure reduction valve installation
Pressure set to:
pAVE: 4,4 3,8 bar
- Minimum night flow reduced:
QMIN: 8,4 4 m3/h
- ALC applied
Pressure management – Results 2
0
5
10
15
20
25
30
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Nu
mb
er
of
bu
rsts
Date
Number of pipe bursts on the "Budatétény felső" sub-zone
Year of installation ofpressureregulating valve
Avg. 20 pcspipe bursts Avg. 13 pcs pipe bursts
Damage caused bysewege networkconstruction
Reduction of commercial lossesactive and passive methods
Active
0 m3 consumption
Atypical/strangeconsumption
Fix rate consumption
Smart metering
Customer inventory
Optimization of watermeters
Reduced of % expiredmeters
Passive
Follow up of technical requests
Discovered connection
Plugged connections
Illegal use of fire hydrants
Optimization of water meters –CONSUMER PROFILE
99,5% Q < 10 m3/h
KROHNE WATERFLUX Q3 = 630 m3/h
Commercial lossesWATER METER SELECTOR PROGRAM
Qátl = 3,5 m3
R80 R100 R125 R160 R200 R315 R400Q1
[m3/h]
Q1
[m3/h]
Q1
[m3/h]
Q1
[m3/h]
Q1
[m3/h]
Q1
[m3/h]
Q1
[m3/h]
0,013 0,01 0,008 0,006 0,005 1 1,25 15
0,02 0,016 0,013 0,01 0,008 1,6 2 15
0,031 0,025 0,02 0,016 0,013 0,0625 2,5 3,125 15
0,05 0,04 0,032 0,025 0,02 0,0127 4 5 20
0,079 0,063 0,05 0,039 0,032 6,3 7,875 25
0,025 10 12,5 25
0,04 16 20 25
Q3 Q4 DN
5,2 m3/h
0,02 m3/h
Q maximum
Q minimum
3,5 m3/hQ average Opt. Size DN 20
Opt. Ratio R200
ILLEGAL CONNECTION FOUND
BEFOREQAVE= 36 m3/d
DIFFERENCE:
QDIFF= 112 m3/d
in EURO: 49.000 €/y
AFTERQAVE= 148 m3/d
Reduction of NRW is basedon data analysis
Detailed areas – DMA system
Pressure-controlled sub-zones
Analyse of customerdatabase
Summary
CONTACT DETAILS:
Name : Evelin MADZIN
Org.: Budapest Waterworks PLC
E-mail : evelin.madzin@vizmuvek.hu
Phone/fax : +36 1 465 2360
THANK YOU !MULTUMESC!
Name : László VARGA
Org.: AquAcust Water-loss Analysis Ltd.
E-mail: aquacust@hu.inter.net
Phone/fax : +36 30 222 4554