Maksimovic - Diane CM

Integrate, Consolidate and Disseminate

European Flood Risk Management ResearchIntegrate, Consolidate and Disseminate

European Flood Risk Management Research

DIANE-CM

Decentralised Integrated ANalysis and

Enhancement of Awareness through

Collaborative Modelling and Management of

Flood Risk

By:

Prof. edo Maksimovi, PhDSusana Ochoa




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




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




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




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




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




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




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




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




Flood Modelling and

Forecasting in the Cranbrook

Catchment

(UK Case Study):

Focus on Pluvial/Surface

Flooding




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.




Pluvial Flooding Dual Drainage Concept

Effective rainfall

Sewer flow

Surface component

Bi-directional interaction

Sub-surface component




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.




Automatic Overland Flow Delineation




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




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




1D-1D Dual Drainage ModelOVERLAND AND SEWER NETWORK MODEL - INFOWORKS CS




1D-2D Dual

Drainage Model(for visualisation

of results)




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.




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).




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



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)




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




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




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




From individual to collaborative modelling

Individual stakeholder

STEP 1COLLABORATION /

NEGOTIATIONSTEP 2 STEP 3

Individual stakeholder

STEP 1COLLABORATION /

NEGOTIATIONSTEP 2 STEP 3

Collaborative workspaceCollaborative workspace




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




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)



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




Enhancing Resilience through

Training, Awareness Raising and

Dissemination:

E-Learning Platform




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)



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




Thank you for your attention!THANK YOU FOR YOUR ATTENTION

AND SUPPORT!

Documents

Maksimovic - Diane CM