Digital operation and Digital operation and Digital operation and Digital operation and procedures for water loss procedures for water loss procedures for water loss procedures for water loss reductionreductionreductionreduction

WebinarWebinarWebinarWebinar, February 11, February 11, February 11, February 11thththth 2021202120212021Marmara Union of Municipalities, Royal Danish Consulate General and Turkish Union of

Municipalities

Sally Nyberg Kornholt. Sally Nyberg Kornholt. Sally Nyberg Kornholt. Sally Nyberg Kornholt. NRW Operations Engineer, Aarhus Vand

Company structure in Aarhus Vand

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COMPANY PROFILE

Operations

Service

Development

Non-Revenue Water reduction

through a holistic approach

Several aspects need to be addressed to reach

low NRW levels and ensure continuous

success

My agenda today:

- Data

- Operation & maintenance

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Operation &

maintenance

Information data Information data Information data Information data

• Water consumption metered at all consumers

• SCADA data from waterworks and District

Meter Areas (DMA’s)

• Pipeline registration

• Data platform – visualized and dataflow

• Etc.

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NRW data in the water cycle

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INFORMATION DATA

Water consumption

SCADA data from waterworks and storage tanks

Pipeline and distribution wells

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SCADA data from DMA's

District Metering Areas (DMA)

INFORMATION DATA

District Metering Areas (DMAs) in Aarhus

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INFORMATION DATA

Data collected

• Flow

• Pressure

• Temperature

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Pipeline registration

Pipeline registration

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• All the important informations are registered

• Data is available to all in the company

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Data platform – visualized and

dataflow

Data platform – visualization and operational dataflows

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INFORMATION DATA

Operation & maintenanceOperation & maintenanceOperation & maintenanceOperation & maintenance

• Organization and response time in leakage

incidents

• Structured water loss monitoring

• Leakage detection

• Pressure management

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Operation &

Maintenance

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Organization and response time in leakage incidents

Repetition: Company structure Aarhus Vand

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OPERATION AND MAINTENANCE

Operations

Service

Development

Workflow Aarhus Vand– leakage (and burst)

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OPERATION AND MAINTENANCE

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Structured leakage monitoring

Use of DMAs

• Look for change in night-

time water consumption

• Calculate an

expected nighttime con-

sumption to compare (at

2 – 4 AM)

OPERATION AND MAINTENANCE

Normal nighttime inlet

New leak

Leakage monitering software

• Quick overview of all zones an sections

• Prioritizing areas for leakage detection

• Daily monitoring

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OPERATION AND MAINTENANCE

Flow

Estimated consumption

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Leakage detection

Leakage detection – methods in Aarhus

Vand• Trailer with a tank (Aarhus Vand method)

• Microphones

• Correlator

• Gas

OPERATION AND MAINTENANCE

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Pressure management

Pressure management and leakage

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OPERATION AND MAINTENANCE

Pressure and volume of water loss are related.

Pressure variation causes poor water quality and more

bursts.

Aarhus Vand actions:

• Minimum pressure is 2,0 bar (1,7 bar)

• Reduce pressure variation

• Calculate and/or measure pressure in

the water distribution network (AQUIS/EPANET) –

advanced pressure management

• Build a model and simulate age of pipes

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ThankThankThankThank youyouyouyou!!!!