OSLO FIGHTS WATER LOSSES WITH A NEW LEAKAGE MANAGEMENT SYSTEM
A NEW STATE-OF-THE-
John Stasig Mørk
Regional Director Asia
John Stasig Mørk has over 30 years of professional
experience from work in multiple Asian countries in various
technical, business development and general management
positions in the water and environmental sectors. He is a
graduate of chemical engineering from the Technical
University of Denmark and was assigned Regional Director
Asia of NIRAS A/S in 2021. He is currently in charge of
NIRAS private / public sectors business.
John Stasig Mørk
Regional Director, Asia
• App. 700.000 inhabitants
• NRW level at around 35% - 50% in many
• Strategy for the ongoing 5-year NRW
Masterplan to reduce NRW to 25% in Oslo.
• Implementation of a Water Network
Management System for optimization of
planning and design as well as monitoring.
• Hydraulic modelling, pressure management
• Support system for leakage detection and
WATER LOSS IN A GLOBAL PERSPECTIVE
Source: IBNET (database.ib-net.org) & SWAN (www.swan-forum.com)
ONE SOLUTION - COMBINING TECHNOLOGIES
The LEAKman concept provides a state
of the art NRW Management system that:
• Integrates all operational systems
• Provides a dynamic overview of the
state and performance of the
• Transform the water supply system to
a Smart Water Network
• Offers well proven technologies for
pressure management and leakage
Neither Denmark nor Norway have water scarcity,
so why are we looking into reducing NRW?
• 35-50% NRW and increasing lack of
investments for rehabilitation
• Highly elevated area
• Population growth
• Limited capacity at treatment plants – new
plant is now required
• No individual metering
• No cultural reduction as water is ”free” –
running from mountains
• No electrical cost – hydro power is ”free”
• No DMA’s and no NRW KPI, so no tool to
• Standard offline hydraulic model without DMA
– only for planning purpose
• Noise logger teams using standard schedules
+50 DMA’s created during project
The hydraulic model was built
based on GIS and estimated Per
Unit Consumption. DMAs were
planned based on modelling
District Metering Areas
Dividing the distribution network into manageable areas
Søndre Dal (7L)
Network Topology was
transferred into networks
diagrams to secure DMA
sections and operations
were as expected.
Very limited metered consumption
Less than 10% of demand in Oslo is metered
Each DMA zone flow determines
the user profile based on Per Unit
Management Information System
IWA KPIs plus additional based on LEAKman
HOMIS - a Holistic Management Information System – was installed to provide online access
to key performance indicators for all DMAs created.
HOMIS was configured in 3 hierarchical levels, and e.g. facilitates access to automated water
balance calculations and reports for any area on daily, weekly or monthly basis.
How to solve the multiple Interface Complexity
Learnings from a real world implementation
• Need for standardized interfaces
and communication protocols to
minimize configuration works and
• Prevent redundant data systems
that are non-synchronized.
Water losses traced by district
Overall districts can be compared.
Water losses traced by DMA
Drill down into DMA’s
IWA Best Practice implemented plus add-ons
IWA PI PI
Water Resource indicators 4
Personnel indicators 26
Physical indicators 15
Operational indicators 44
Quality of Service indicators 34
Economical and Financial indicators 47
Combining the IWA
best practice with
PIs / KPIs such as
DMA Average Pressure
and noise logger
status supports the
leakage team in
Analysis using KPI’s
Leak potential analysis
If i.e. the Minimum Night Flow raises an alarm the DMA can easily be investigated for other
KPI’s to ensure the sanity of the alarm or reject the alarm as false.
Included in the analysis is beside SCADA data also data from the online Hydraulic Modelling
IWA: Non Revenue Water
LEAKman : Absolute MNF
HMS : Simulated Average Pressure
The Digital Twin of a network
• In the online Hydraulic
modelling System all relevant
data for taking the right
decision are available
including hydraulic and
quality results for all DMA’s
• The Digital Twin is in addition
also used for both planning
and contingency operations to
understand how the service is
affected by changes to
HMS data for a DMA
For each DMA the real time
HMS generates continously
Measured vs calculated in the HMS
• Pressure trends
investigated if an
alarm is raised.
• Sudden changes to
Checking ongoing work
Ruling out other causes.
• Failing meters or
profiles may be
works which can
be displayed in
the MIS and HMS
Noise loggers in the MIS and HMS
Decision making using multiple data sources
• For further support and better and fast leak
detection Oslo is now testing permanent
• Noise logger alarms and battery level issues
alarms in the MIS and HMS and displays the
• The loggers are also used to priortize the
potential leak alarms from the DMA’s
Overall Oslo has now a Smart Water
Network Management System
Or a Digital Twin of their distribution network.
Combining data and functions:
The Evolution of ICT Systems
SWAN - Smart Water Network Forum
When reaching level
4 the need for
ICT Systems is
• Real-time Hydraulic Modelling
• Intelligent Pumps
• Intelligent Valves
• Smart Metering
• Noise Loggers
• Holistic Management Information
• Online Benchmarking
• Based on IWA & AWWA Best
LEAKman PROCESS OVERVIEW
NRW master plan
Network & asset
Speed & quality of repairs
Online monitoring &
Active leakage control
Training & education
Pipeline management &
KPI monitoring & reporting
Evaluation & new targets
15 – 25%
10 - 15%
Goals achieved for Oslo until now:
• Creation of +50 DMAs – and more to come
• Connection various Infrastructure
Communication Systems and combining data
to give access to MIS and HMS
• Getting a holistic overview of DMA KPI’s
• Reduce pressures in pressure zones (Pilot
• Evaluate test of permanent noise loggers
Next Steps for Oslo:
• Test and install smart meters at customers
• Finalize DMA sectioning
• Understand and prioritize by using Holistic
Management System and the Online
Hydraulic Modelling System
• Look into strategic rehabilitation of
Take aways from the Oslo experience:
• Know your data
• Have an action plan for reducing NRW
• Rehabilitation / renewal using history
• Sufficient investment and frequent evaluation
• Think long term – CAPEX vs OPEX
• Skilled, trained, qualified and empowered
personnel (capacity building)
• Big data is coming – use the data and do it
• Holistic approach combines knowledge and
We strive to move towards an enhanced
By using data and holistic view on the utility.
We cover a wide spectrum both professionally and geographically. We have close to 2,200 employees in 51 offices in 27 countries. We have 7,000 ongoing projects in 108 countries.
Our DNA ties us together across national borders, sectors and professional expertise.
2 water sources + new to be finished in 2028 Produced
The Danish NRW level is on average 7% even though we have + 100 years old pipelines. Only surpassed by Singapore mainly due to new infrastructure.
What do you get? One State-of-the-art leakage management solution Seamless and generic interfaces Optimized value of each individual system when combined
Pipes, valves, pumps, smart meters, sensors, simulation models, management information systems (MIS) etc. The idea behind the LEAKman initiative is to make all components of the utility and the distribution network operate as an integrated system. This allows the utility to manage assets, production, operation, leakage, energy consumption, pressure, revenue and finance, making it profitable and helping you achieve a single, integrated and sustainable system.
Neither Denmark nor Norway have water scarcity, so why are we looking into reducing NRW?
Denmark’s water supply is almost 100% based on groundwater. In the 1980’ties the total abstraction was critical, and in some areas threatening the water resources. Several initiatives were introduced to reduce abstraction and mitigate future crisis.
DMA creation using HMS
The HOMIS system collects data from various data sources and presents grapically KPI trends based on the IWA best practise and our own experience from the LEAKman project executed with Danish utilities and manufactorers. Water balances and reports are easily accesible as well as the options to analyze and compare KPIs within or across DMAs in order to prioritize efforts. The utility management can with HOMIS weekly or monthly follow the progress and follow up with the relevant teams and departments.
Tested in Copenhagen – implemented in Oslo. Founded by NIRAS – supported by:
The LEAKman projekt Product of nine Danish Partners who has formed a consortium To make the best state-of-the art leakage management solution. A solution that integrates excisting products and services in combination with the goal to stop water losses – or at least reduce water losses in the world. We believe that Denmark – and the nine partners - has the know-how and technologies to do so.
Supported by: The Danish Ministry of Environment and Food. Danish Eco-Innovation Program Timeline: Four years - 2016 to 2019 Budget: 43 mill. DKK.
The elements contribute to the total reduction of water consumption Hence, it is not only technology, but also policies and public awareness. Hence holistic approach II (first one defined through LEAKman loop)
In many ways, most of the 7,000 ongoing projects NIRAS runs mirror one or more of the 17 sustainable goals set by the UN in 2015 – also called the SDGs (Sustainable Development Goals).
The 17 SDGs set an ambitious agenda for the entire world. The goals can only be achieved if governments, NGOs and the private sector work closely together. At NIRAS we are proud of the contribution we make in our projects, and we have the ambition to do more.
Our mission is to deliver sustainable solutions to our customers, and in 2017 we integrated the SDGs in our forward strategy. In every sector we ask ourselves whether we can introduce new services so that, together with clients, we can contribute to the development goals.
NIRAS was founded on the ambition to improve living conditions and prosperity in Greenland, and over the years we have delivered clean water to millions of people worldwide. Through our commitment to development projects, we strive to fight poverty and improve local living conditions. We have designed hospitals during the last 100 years and contributed to an improvement of the health sector, and we also implement projects within education and gender equality. Our services are aimed at protecting the environment; from district heating to solar energy and offshore wind energy, we strive to make energy production more sustainable. By designing railways, roads and ports, we create mobility and cohesion – always with the ambition to achieve the most sustainable solution.