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DIANE-CM
Decentralised Integrated ANalysis and
Enhancement of Awareness through
Collaborative Modelling and Management of
Flood Risk
By:
Prof. edo Maksimovi, PhDSusana Ochoa
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Project Partners
Leuphana University of Lneburg(Germany)
Imperial College London(United Kingdom)
UNESCO-IHE Institute for WaterEducation, Delft (Netherlands)
The DIANE-CM project is part of the European
CRUE ERA-NET program
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Local Redbridge Stakeholders working with us:
London Borough of Redbridge: Emergency PlanningDepartment, Highways and Engineering Services, Planning
Department, and Local Councillors
Fire Brigade
Thames Water
Environment Agency (Flood Forecasting and IncidentManagement Teams)
Local community associations, for example: MaybankCommunity Association and Broadmead Baptist Church
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Main Objectives of the DIANE-CM Project:
To enhance flood risk awareness and capacity throughcollaborative modelling and social learning.
To develop and test an advanced methodology for improvingpreparedness and mitigation of fluvial and pluvial floods.
Enhance
resilience of local
communities to
flooding
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Goals and Working Steps
1. Improvement of flood hazard and
risk maps and Near-Real-Time flood
forecast
2. Analysis of local stakeholders and
development of organi-sociogram in order
to illustrate vertical and horizontal
interactions between stakeholders for
better interactions
Numerical Weather Prediction: UM/MM510 km
1 km
C-Band
Meteorological Radar
X-Band1 km
100 m
Ground Raingauge Network
CALIBRATION
T = Future
T = Currenti
t
NOWCASTING
1 kmSTATISTICALLYDOWNSCALING
i i
tTemporal
Spatial
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3. Increase participation and shared decision making
of local communities and stakeholders through
collaborative modelling, supported by a
collaborative platform and e-learning platform
4. Testing the developments in 2 selected case studies (one inGermany and one in the UK)
5. Evaluation of what the local communities can learn from improvedunderstanding of risk and identification of barriers for enhancingflood resilience.
6. Training, awareness raising and dissemination of the results.
Goals and Working Steps
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UK Case Study: Cranbrook catchment Area: aprox. 910 ha
Located within the London Borough of Redbridge (NE of London)
Sub catchment of Roding River catchment
Has experienced severe fluvial and surface flooding in the past
#*
#*
!(
Redbridge
High Ongar
0 7.5 153.75Kilometers
Legend
River flow gauging stations
Cran Brook catchment
Seven Kings catchment
Roding catchment
#*
London
Redbridge
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River Alster (Hamburg/Germany)
Length 56 km
Drainage basin of about 587 km2.
Tributary of Elbe river
High damage potential
Natural and canalised parts, dammed lakes
German Case Study: Alster river catchment
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Focus on surface flooding
- Focus on flood risk and event management
- Planning issues with GE support
- Focus on fluvial flooding
- Surface flooding with UK support
Focus on planning issues
Supported by web-based tools (UNESCO-IHE) and experiences of
Dutch experts in planning and flood risk management
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Flood Modelling and
Forecasting in the Cranbrook
Catchment
(UK Case Study):
Focus on Pluvial/Surface
Flooding
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Surface water (or pluvial) flooding:
Flooding caused by intense rainfall, which
exceeds the capacity of the installed drainage
system. This type of flooding is typically localised
and happens very quickly after the rain has fallen,
making it difficult to give any warning.
Predicting and pinpointing this type of
flooding is much more difficult than doing so
for river or coastal flooding.
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Pluvial Flooding Dual Drainage Concept
Effective rainfall
Sewer flow
Surface component
Bi-directional interaction
Sub-surface component
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Dual-drainage concept:
Sewer Network + Overland Network
Sewer system (manholes and pipes): one-dimensional model (1D)
Overland system (depressions and flow paths): can be modelled in 1D or 2D:
2D overland flow modelling: Surface divided into smallelements (squares or irregular triangles). Long computational
time, not suitable for real time forecasting.
1D overland flow modelling: Overland system consists ofnodes (ponds) and links (flow paths). It is generated with
AOFD tool using DEM (Digital Elevation Model). Fast, suitable
for real time applications.
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Automatic Overland Flow Delineation
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Tool for analysis and generation of overland network and automatically quantifying hydraulic parameters for simulation model of pluvial urban flooding
Based on Digital Elevation Model information
Nodes: ponds and associated storage capacity
Links: pathways + computed geometry
Interactions between the overland flow and sewer systems occur at manholes
AOFD MethodologyDEM +
Building layer
Overland Network
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Overland Network of Cranbrook Catchment
The ponds identified by the AOFD tool coincide with known depressions and storage
areas within the Cranbrook Catchment and also with areas which have experienced
surface flooding in the past
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1D-1D Dual Drainage ModelOVERLAND AND SEWER NETWORK MODEL - INFOWORKS CS
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1D-2D Dual
Drainage Model(for visualisation
of results)
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Rainfall forecasting and downscaling:
Rainfall is the main input for flood models
Forecasting techniques: Based on radar data (STEPS model) Based on network of rain gauges only (Support Vector
Machine + Singular Spectrum Analysis)
Downscaling techniques: for obtaining finer spatial andtemporal resolution (i.e. more detailed information), which
is essential for surface flood forecasting. A new cascade
method for downscaling is being developed.
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Monitoring System
3 tipping bucket rain gauges, with 1-2 min data sampling.
1 pressure sensor for Roding River level monitoring.Real time frequency: 5/10 min.
2 sensors for water depth measurement in sewers. Realtime frequency: 5/10 min.
1 sensor for water depth measurement in open channels(downstream boundary condition).
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Stakeholder Analysis in Redbridge
Main stakeholders were identified
Structured interviews were conducted during June, July
and August 2010
Stakeholders were categorised
Organi-sociogram was developed
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Ofwat DefraHighways
AgencyMet Office GLA
Thames
Water
Environment
Agency
Fire Brigade
Redbridge
Emergency
Planning
Department
Local Council
Redbridge
Highways
and
Engineering
Metropolitan
Police
Service
Transport
for LondonRedbridge
Planning
DepartmentLocal
Coucillors
National
Express
(Railway
Operator)
Riverside
ConcernUtilities- gas,
electricity,
water
Flood
Wardens
Residents
Businesses
Flood
Forecasting
Centre
Local
Champions
Primary
Stakeholders
Secondary
Stakeholders
Tertiary
Stakeholders
Regional and National Level Institutions
STAKEHOLDERS ORGANI SOCIOGRAMUK CASE STUDY (LONDON BOROUGH OF REDBRIDGE)
Flow of information (1-way or 2-way, according to arrows)
Flow of information + close cooperation
Flow of information + potential conflicts
Potential flow of information
Potential cooperation
Strong cooperation
during flood events
Strong cooperation for
flood forecasting
Canoe Club
Insurance
Companies
?Maybank
Association
Redbridge
Council for
Voluntary
Services
Broadmed
Road
Baptist
Church
Redbridge
Flood
Forum
Redbridge
NHS
Schools
and
Daycares
Youth
Groups
Multipliers
MEDIA
(Redbridge
Life, Ilford
Recorder,
Redbridge I,
radio)
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COLLABORATIVE PLATFORM:
We want to know what you know and what you thinkabout flood risk in Redbridge to enhance improvements
The Collaborative Platform enables interaction betweenlocal stakeholders and joint analysis of flood scenarios
and alternatives for dealing with flooding in Redbridge
Purpose: to jointly identify appropriate measures forbetter dealing with surface flooding in Redbridge
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Tasks supported by the Collaborative
Platform
Development of shared understanding of current flood risk
Development and evaluation of alternatives (sets ofmeasures) for flood risk reduction or (re)distribution
Flood risk alternatives testing under different scenarios
Support for negotiation and selection of commonly agreedalternatives
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Conceptual framework and general
workflow on the platform
Web platform functions:
Modelling support
Front-end: web-based user
interfaces for different
stakeholders
(somewhat customisable)
Server side
Hazard /
vulnerability
/ risk
data
Internet
SH1 SH2 SH3 .
Client side
Back-end
server side
support for
all functions
1. Current flood
risk
representation
(maps / graphs /
text)
2. External
scenarios for
flood risk
3. Measures /
alternatives /
strategies for
FRM:
development
and evaluation
4. Negotiation /
collaboration on
group-preferred
alternatives
Scenarios
data
Measures /
alternatives /
strategies
data
Users
evaluation /
preferences
data Databases
Users managm. tools
General usage flow
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From individual to collaborative modelling
Individual stakeholder
STEP 1COLLABORATION /
NEGOTIATIONSTEP 2 STEP 3
Individual stakeholder
STEP 1COLLABORATION /
NEGOTIATIONSTEP 2 STEP 3
Collaborative workspaceCollaborative workspace
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Scenario: set of conditions that are out of the decision maker choice
SCENARIOS THAT WILL BE ANALYSED:
Combination of:
Return periods of 30 and 200 years
Low and high levels at the River Roding
Summer rainfall profile will be used for all scenarios
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Alternative: action that can be implemented for managing
flood hazard and risk
ALTERNATIVES THAT WILL BE ANALYSED AND
EVALUATED:
Rainwater harvesting (mitigation measure source level)
Improved and targeted maintenance regimes (mitigation measure pathway level)
Improved rainfall and flood forecasting and warning (mitigation measure receptor level)
Improved resistance (mitigation measure receptor level)
Social change, education and awareness (mitigation measure receptor level)
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Timeline for collaborative modelling exercises
(Redbridge/UK)
EVENT PURPOSE / ACTIVITIESBrainstorming / Informative Session
(Jun 2010)
-Information about DIANE-CM project and methodology
-Motivation
-Brainstorming (new ideas for the project)
2nd Meeting: Information/Discussion
(Jan 2011)
-Discussion of first draft of collaborative platform and methodology for collaborative modelling exercise
-Discussion about scenarios to be analysed
-Clarification of terms and official framework
3rd Meeting:
Collaborative Modeling Exercise
(Feb 2011)
- Exercise using collaborative platform
- Analysis and discussion of scenarios and measures to be implemented for effectively dealing with flood risk.
4th Meeting:
Conclusion Wrap-up
(March 2011)
Conclusion on measures and implementations
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Enhancing Resilience through
Training, Awareness Raising and
Dissemination:
E-Learning Platform
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E-LEARNING PLATFORM
PURPOSE: TRANSFER KNOWLEDGE
Different short courses will be produced for each of thefollowing target groups:
1. General public
2. Planners
3. Emergency managers
4. Flood management professionals
(consultants, modellers)
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Audience-specific
courses
Forums for interaction
between
trainers and
trainees
Tagging of resources
within and
outside the
platform:
content co-
generation!
PLANNED COURSES
Introductory Module: I.1. Introduction to urban water cycle and system I.2 Why and how are urban areas flooded types of flooding I.3. Flood mapping, vulnerability and resilience I.4. DIANE_CM project outputs and how to use them (Platform, Guidelines)
Group 1 Planners: P1. The role of planning in flood vulnerability reduction P2. Data, models and planning tools, quantification of vulnerability P3. Means of flood reduction (structural and non structural measures, SUDS, WSUD) for greenfield and retrofit applications. P4. Simple demo training tools for planners (SimCity) with example exercises
Group 2 Flood modellers: FM1. Advanced data sets for modelling of different types of flooding FM2. Models and pluvial food modelling enhancement tools (incl. AOFD) FM3. Rainfall and urban flood prediction and quantification of uncertainty. FM4. Vulnerability quantification, mapping and risk assessment FM5. Demo site Redbridge with example exercises
Group 3 Real time Operators and Emergency Managers: RT1. Rainfall and urban flood prediction (data, models, mapping, critical time assessment and management) RT2. Methods and tools for RT operation of flood management systems (centralised vs decentralised approach) RT3. Methods and tools for emergency management RT4. Demo site Redbridge with example exercises
Group 4 Vulnerable population: Pop1. Prior to Floods: Use of vulnerability maps, Managing property flood vulnerability Pop2. During Floods: Community organisation and interactions with flood emergency managers and access to electronic media information Pop3. After Floods: Recovery and Rehabilitation
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Thank you for your attention!THANK YOU FOR YOUR ATTENTION
AND SUPPORT!