(GSP) Management of Public Utilities / (IMFS) Mechanical Institute of Fluids and Solids
Ecole Nationale de l‘Eau et de l’Environnement de Strasbourg / Cemagref / CNRS / UdS
Automating the evaluation of
flood damages
-Methodology and potential gains-
ELEUTERIO J., MARTINEZ E. D.
Context
Objectives
Methods
Results
Perspectives
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• Context
• Objectives
• Methods
• Results
• Perspectives
ELEUTERIO J. - Automating the evaluation of flood damages - Methodology and potential gains
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Context
Objectives
Methods
Results
Perspectives
3
• Evaluation of flood damages
• Risk analyses: loss potential of flood events
• Risk management: benefits of flood alleviation projects
• Economic criteria in decision making process
• Method:
Data
acquisition
Vulnerability
assessment
Hazard
modelling
Data
processing
Risk
assessment
Damages
calculation
Economic risk
evaluation
• Results: reports, risk maps, consequence maps, models
ELEUTERIO J. - Automating the evaluation of flood damages - Methodology and potential gains
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Context
Objectives
Methods
Results
Perspectives
4
• Thesis project
• What is the impact of the strategies used to model hazard
and assess vulnerability in the results of economic flood risk
evaluations?
Different strategies
Data
acquisition
Vulnerability
assessment
Feasibility
Hazard
modelling
Data
processing
Risk
assessment
Damages
calculation
Economic risk
evaluation
Automate
Results variability
ELEUTERIO J. - Automating the evaluation of flood damages - Methodology and potential gains
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Context
Objectives
Methods
Results
Perspectives
5
• Develop a general methodology to
automate the evaluation of flood damages
• Analyse the gains of the automation in
terms of time and expertise needs
ELEUTERIO J. - Automating the evaluation of flood damages - Methodology and potential gains
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Context
Objectives
Methods
Results
Perspectives
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• Automate the evaluation of flood
damages
• GIS platform : ArcGis 9.2
• Programming language: VBA
• Measure the gains enhanced by the
automation
• Develop a hypothetical example of flood
damages evaluation
ELEUTERIO J. - Automating the evaluation of flood damages - Methodology and potential gains
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Context
Objectives
INPUT DATA
Methods
Results
Perspectives
EVALUATION PROCESS
OUTPUT DATA
STAGE A
Data combination
Assets at risk
Damage functions
STAGE B
Potential damages
calculation
Assets damages
Floods frequency
STAGE C
Expected Annual
Damages calculation
Expected annual
damage per asset at
risk
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Flood hazard maps
Assets vulnerability
maps
ELEUTERIO J. - Automating the evaluation of flood damages - Methodology and potential gains
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Context
Objectives
Methods
Results
Perspectives
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Flood hazard maps
STAGE A
Data combination
Assets at risk
Assets vulnerability
maps
INPUT
COMBINATION
OUTPUT
Only one value (INPUT minimum, average or
maximum) is attributed to the OUTPUT feature.
Hazard
A) Points
B) Lines
Layers
combination 1
C) Polygons
Vulnerability
Layers
combination 2
The different INPUT values are attributed to the
OUTPUT feature.
ELEUTERIO J. - Automating the evaluation of flood damages - Methodology and potential gains
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Context
Objectives
Damage functions
Methods
STAGE B
Potential damages
calculation
Results
Perspectives
9
Assets damages
ELEUTERIO J. - Automating the evaluation of flood damages - Methodology and potential gains
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Context
Objectives
Floods frequency
Methods
STAGE C
Expected Annual
Damages calculation
Results
Perspectives
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Expected annual
damage per asset at
risk
ELEUTERIO J. - Automating the evaluation of flood damages - Methodology and potential gains
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Context
Objectives
Methods
Results
Perspectives
11
• Automate the evaluation of flood
damages
• GIS platform : ArcGis 9.2
• Programming language: VBA
• Measure the gains enhanced by the
automation
• Hypothetical example
ELEUTERIO J. - Automating the evaluation of flood damages - Methodology and potential gains
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Context
Objectives
Scenarios
Scenario 1
Scenario 2
Scenario 3
Methods
Results
Approach
Semi-automatic
Automatic
Perspectives
12
Expertise level
Medium
High
Irrelevant
•
Semi-automatic approach: using simple functions of a GIS software
•
Automatic approach: the analyst uses an existing tool to process the data in
the GIS software
•
Medium expertise level: the analyst is proficient in GIS software and knows
exactly which functions and when to use them to achieve the loss
evaluation
•
High expertise level: the analyst have some knowledge of Visual Basic for
Applications (VBA), he or she is proficient in the GIS software and knows
exactly which tools and when to use them to achieve the loss evaluation
ELEUTERIO J. - Automating the evaluation of flood damages - Methodology and potential gains
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Context
Objectives
Methods
Results
Perspectives
13
• General methodology
• Tool
• Analysis of gains
ELEUTERIO J. - Automating the evaluation of flood damages - Methodology and potential gains
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Context
Objectives
Methods
Results
Perspectives
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• After processing INPUT data according to the
specifications of the Tool.
ELEUTERIO J. - Automating the evaluation of flood damages - Methodology and potential gains
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Context
Objectives
Methods
Results
Perspectives
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• General methodology
• Tool
• Analysis of gains enhanced by automation
ELEUTERIO J. - Automating the evaluation of flood damages - Methodology and potential gains
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Context
Objectives
Scenarios
Methods
Approaches
Scenario 1
Results
Perspectives
Expertise level
Evaluation Time
Medium
~ 94 min
High
~ 41 min
Irrelevant
~ 1 min
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Semi-automatic
Scenario 2
Scenario 3
Automatic
• Relevance of gains in practical applications
•
•
•
•
Sensitivity tests
Analysis of uncertainty
Comparison of management scenarios
Reduction of human error occurrence
• Disadvantages: limits of automated processes
ELEUTERIO J. - Automating the evaluation of flood damages - Methodology and potential gains
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Context
Objectives
Methods
Results
Perspectives
17
• Improve the tool
• Use the tool to test sensitivity of flood
damages evaluation
• In the Thesis project
• In future: other scientific studies, public utilities?
ELEUTERIO J. - Automating the evaluation of flood damages - Methodology and potential gains
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Context
Objectives
Methods
Results
Perspectives
THANK YOU
[email protected]
ELEUTERIO J. - Automating the evaluation of flood damages - Methodology and potential gains
ELEUTERIO J. - Automating the evaluation of flood damages - Methodology and potential gains