Integrated Modelling to Support Integrated Management: Real-time Catchment Approaches - Nick Elderfield (DHI) Delivered at: - ESI Annual Water Event 2014: JOINED UP THINKING - Managing the whole catchment's resources for multiple benefits 10 June 2014 - Reading, UK

1. Integrated modelling to support integrated
management - real-time catchment approaches
Nick Elderfield
Managing Director
DHI Water Environments

2. Our world is
water
© DHI
Introducing DHI
The expert in WATER ENVIRONMENTS
#2

3. © DHI
Our areas of expertise
to help solve the world’s toughest challenges in water environments
Aqua- & agriculture Marine structure & energy Climate change
Coast & marine Surface & ground water Urban water
Industry Environment & ecosystems Product safety & environmental risks
#3

4. Who we are
…and why we can claim to be
the expert in water environments
© DHI #4

5. Our people advance our knowledge and deliver it worldwide
Highly qualified Equal employment
1100+ staff
120 man years R&D
Representing 56 nationalities Global knowledge sharing &
staff mobility
© DHI #5

6. What we know
Global knowledge of water environments

7. At our Core
Making this knowledge accessible

8. Integrated catchment approaches – the
DHI view
© DHI #8

9. © DHI
Basis for the approach
#9

10. © DHI
Basis for the approach
#10
Real-time
Planning
Core
Data &
Information
management
Prevention and
mitigation
Climate change
adaptation
Operational
forecasting
Emergency
management
Live model
Access
Business
Intelligence
Resource
assessment

11. © DHI
Basis for the approach
#11
• data ownership
• access to data
• sharing of data
• trust building
• problem identification
• scenario analysis
• stakeholder involvement
• performance indicators
• weightings (MCA)
• socio economics • operations (day-to-day)
Technicians / Engineers
Policy Makers / Managers
• data safety
• data visualisation
• data processing
• Institutional issues
• water use strategies
• Investment strategies
Exchange and access to
data and information
Modelling
and Analysis
MIKE
Customised
Data

12. © DHI
Basis for the approach
Model
Tools
Data
Management
Reporting Analysis
Scenario
Management
Baseline
Alt 1
Alt 2
Alt 3
Alt 4
Alt 5 Total weighted
Cost
Sedimentation
Pop. Displace.
Flood Control
Water Supply
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Performance
Value
Alternatives
Criteria
Flood Reduction Investment Alternatives Evaluation
MCA / CBA Ensemble

13. Integrated catchment modelling
© DHI #14

14. © DHI
#15
• Integrated
Fully dynamic coupling
• Distributed
Spatial and temporal
variation of input data
and parameters
• Physically based
Basic flow processes, physical
interpretation of model
parameters, direct use of field data
• Comprehensive
‘All-in-one’-model

15. © DHI
River Parrett
Catchment
#16
• Prone to winter floods of fresh water and
salt water in connection with extremely
high tides
• Much of the low-lying area is designated
as a wetland of outstanding ecological
importance
• Conflicts between land and water
management activities

16. © DHI
River Parrett
Catchment
#17
Jong-Sook Park & Ian Cluckie,
Swansea University
FRMRC
project

17. © DHI
River Parrett
Catchment
#18
Jong-Sook Park & Ian Cluckie,
Swansea University
• Study investigated changes in
land use
• Implementation of flood detention upstream
Findings
• Significant local effects
• Limited flood benefits on the catchment scale
However - Significant benefits in terms of
catchment management.
• Sediment management
• Ecosystem services

18. Integrated real-time control of major river
systems
© DHI #19

19. © DHI
CARM
#20

20. © DHI
CARM
#21
Knowledge of river behaviour
Measurements of river flows and diversions
Forecast of inflows and demands

21. © DHI
CARM
#22

22. © DHI
CARM
#23

23. Integrated real-time control and warning
for urban areas and receiving waters
© DHI #24

24. © DHI
Aarhus – Denmark
… Second
largest city in
Denmark
… European Cultural
Capital 2017 -
RETHINK Aarhus
…Located by the
Sea
…310,000
inhabitants
#25
©Sculpturesbythesea©visitaarhus

25. © DHI
Aarhus – Danish for Progress
… Architecture
and art
… Business and
industries
…Aarhus
University
…Recreational
and active use of
the environment
#26

26. Project domain
© DHI #27

27. Motivation
© DHI #28

28. © DHI
Project drivers
…Integrating
water into the
urban space
… Recreational
use of water
…New housing
area on the
harbor front
…Rapid city
development
#29
©Politiken©Aarhus.dk

29. A forward looking project made in co-
operation between Aarhus Municipality
and Aarhus Water
From overall vision for the future
to concrete plan of actions.
Water Vision 2100
”Pure water both in nature
and for drinking
– now and in the future 2100
© Aarhus Water
© DHI 30

30. © DHI
Expected project outcome
…Improved water
quality/partly bathing water
in River Aarhus
… Bathing water in the
Harbour (hygienic)
…Bathing water in Lake
Brabrand (hygienic)
#31
© Aarhus Water © Aarhus Water © Aarhus Water

31. From vision to operation
© DHI #32

32. © DHI
3 projects - 1 solution
…Implementation of
infrastructure
2007-2012
…Integrated model based
control and warning
PREPARED
2009-2013
…Analysis and design
2006-2007
#33

33. Boundary conditions
© DHI
River through the city
Recipient for urban water
Water level affects CSO
Water level in harbour
Defines river gradient
Rising sea levels?
Good water quality
- Harbour bath
- Housing on the harbour
Increased flooding frequency
Outflow depended on the sea level
Increased rural run-off due climate changes
AIM:
To forecast the water
quality in the harbour
Optimize the
capacity of the
drainage system and
the WWTP’s
#34

34. Domain of real time system control
© DHI #35
A
B
C
Return period
Rainfallintensity
Light rain
return period < 1 year
Design rain
return period 2-10 year
Extreme rain
return period > 100 year
Adapted from: Fratini et al. (2012)

35. Challenge – Recreational water is receiving water
© DHI
3 wastewater treatment plants
75 combined sewer overflows (CSO)
58 storm water drains
50% of the flow in the river is from WWTPs
© DHI #36

36. Finding the right solution
© DHI
• Multiple scenario analysis based on integrated modelling
− Retention basin volumes
− System layout
− WWTP capacity
− Storm water system upgrade
− Removal of CSO structures
− Disinfection of WWTP effluent
− Climate scenarios
Mike Urban Model
#37

37. Identified challenges
• Sufficient storage tank volume
− cost/space limitations in old city center
• Sufficient water quality
− bathing water quality in Lake Brabrand
The Harbour of Aarhus and
partly in the River of Aarhus
• Climate change
− rain intensity and sea level rise
© DHI #38
© PREPARED
© PREPARED
© PREPARED

38. Solution - 50 mill. EUR project 2009-2013
• Infrastructure investment
− 9 retention basins
− Disinfection at WWTPs and basin
− Increased hydraulic capacity at
WWTPs
• Optimized control System
− Integrated real time
modelling/control (sewer
system/WWTP)
− Early Warning System
© DHI #39

39. Integrated Real Time Control System
© DHI
SCADA
Models
Rainfall
forecast
• Automated operation of:
− Data collection
− Data processing
− Model execution
− Finding the optimal solution
− Control of structures
− Issue warnings
#40

40. Integrated real-time control
© DHI
Sewer
#41

41. DHI Local Area Weather Radar (LAWR)
• Small scale weather radar
− X-band radar
• Range
• 60 km for forecast
• 20 km for Quantitative Est.
• Spatial resolution (Cartesian)
• 500x500, 250x250, 100x100 m
• Image frequency
• 1 or 5 minute LAWR installation in Aarhus Denmark.
© DHI #42

42. © DHI
MIKE 11
MIKE URBAN
MIKE 3MIKE SHE
Data flow
Model preparation
Model execution
Real time control
Issues of warning
DIMS.CORE
Distributed
rainfall
from DHI
Radar
Automated Integrated Modelling

43. DHI bathing water forecast service
© DHI #44

44. • App and web based public warning system
Public information on bathing water quality
© DHI #45

45. Internet
46
Environmental Section
Aarhus Municipality
Aarhus Water
Utility company
Waterforecast
Operated by DHI
One realtime system -
Integrating data from multiple organizations and authorities
© DHI

46. Status
© DHI #47

47. © DHI
Project Status
…Improved water quality in
River Aarhus
… Bathing water in the
Harbour (hygienic)
…Bathing water in Lake
Brabrand (hygienic)
  
#48
© Stiften ©Politiken © Stiften

48. Saving in investment
© DHI
• Ordinary and larger retention basins 79 million EUR
• Controllable and smaller retention basins 45,6 million EUR
• Automation and control system 1,7 million EUR
• Total 47,3 million EUR
• Saving 32 million EUR
40 %
#49

49. Thank you
Nick Elderfield, DHI Water Environments UK Ltd
nje@dhigroup.com
© DHI #50