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