Flood damage functions for EU member states
Flood risk mapping using Corine land cover datasets
José I. Barredo, Ad De Roo
CIS Working Group F Thematic Workshop Floods and EconomicsAppraising, prioritising and financing flood risk management measures and instruments
Ghent, 25 - 26 October 2010
• Flood damage functions for EU member states → Database
• European-wide studies at continental level
• Impacts of climate change on flood losses
• Adaptation
Rationale
Hazard
Water depth scenarios
Exposure
Exposed assets
Vulnerability
Flood damage functions
Flood damage potential
Risk = Hazard * Exposure * Vulnerability
• Vulnerability (damage functions) is defined as the susceptibility of the exposed assets at contact with water
• This factor measures the extent to which the assets could be affected by the hazard
• Flood damage functions show the susceptibility of assets to certain inundation characteristics, in this study specifically against inundation depth
Flood damage functions
Hazard ExposureVulnerability
Flood water depth
e.g. 100-yr return period
Corine land cover
44 land cover classes
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Water depth
Eco
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dam
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Flood damage functions
Flood damage potential
[assuming no defences]
Assessing flood damage potential
Corine land cover
• Land cover map of Europe
• 44 land cover/use classes
• Smallest mapping unit: 25 ha
• Distributed at 100 and 250 m grid size by EEA
Forest and semi natural areas Broad-leaved forest
Coniferous forest
Mixed forest
Natural grasslands
Moors and heathland
Sclerophyllous vegetation
Transitional woodland-shrub
Beaches, dunes, sands
Bare rocks
Sparsely vegetated areas
Burnt areas
Glaciers and perpetual snow
Wetlands Inland marshes
Peat bogs
Salt marshes
Salines
Intertidal flatsWater bodies Water courses
Water bodies
Coastal lagoons
Estuaries
Sea and ocean
LABEL1 LABEL3
Artificial surfaces Continuous urban fabric
Discontinuous urban fabric
Industrial or commercial units
Road and rail networks and associated land
Port areas
Airports
Mineral extraction sites
Dump sites
Construction sites
Green urban areas
Sport and leisure facilities
Agricultural areas Non-irrigated arable land
Permanently irrigated land
Rice fields
Vineyards
Fruit trees and berry plantations
Olive groves
Pastures
Annual crops associated with permanent crops
Complex cultivation patterns
Land principally occupied by agriculture, with SANV
Agro-forestry areas
• JRC project (2007) - Implemented by HKV consultants (NL)
• The aim was to produce flood damage functions relating water depth and economic damage for the assessment of direct damage as consequence of floods
• Collection of harmonised flood damage functions for EU MS
Flood damage functions database for
EU member states
• Study based on available information in MS
• Damage functions adapted for all EU countries + N, CH, HR, MK and Turkey, and Corine land cover datasets
• Only damage potential by water depth (other factors, e.g. duration of the flood, flow velocity and sediment concentration of the water are not included, but they do influence damage as well)
• Functions measured in Euros
Flood damage functions database for
EU member states
Flood damage functions database
Literature reviewQuestionnaires
Flood damage data/functions
Collected country-specific data(functions; max. damage data)
Economic characteristics of countries (GDP, purchasing power)
Corine land cover classes [44]
- Countries with data (11)- Countries with no data
Harmonisation
Assignment of functions/max. damage to countries without known functions
Country specific functionsper Corine class
Flood damage functions database
HarmonisationCorine classes
LABEL3
Continuous urban fabric
Discontinuous urban fabric
Industrial or commercial units
%
Residential 50
Transport 18
Commercial 5
Construction 5
Unused 5
Other 17
Limitations
• The database should be seen as a first collection of averaged damage functions at national level
• The information is based “only” in 11 countries
• There are well known intra-country regional differences in damage functions
• The database has been implemented for Corine datasets
• Improvements are needed, e.g.
– Including other damage factors: duration of the flood, flow velocity, sediment concentration of the water
– Damage functions at intra-country regional level
Dissemination
• The database of flood damage functions could be useful for countries without known functions
• It should be noted that the database is a first step for more detailed and accurate data
• The JRC will handle specific request from countries interested in the database
• Feedback from users could improve the information included in the database
• The limitations of the database should be carefully considered for risk assessment
Thank you
http://floods.jrc.ec.europa.eu
