4th international symposium on flood defence: managing flood risk, reliability and vulnerability...
TRANSCRIPT
4th International Symposium on Flood Defence: Managing Flood Risk, Reliability and Vulnerability Toronto, Ontario, Canada, May 6-8, 2008
CHARACTERIZATION OF FARM VULNERABILITY TO FLOODING FOR ECONOMIC APPRAISAL OF FLOOD
MANAGEMENT PROJECTS
Brémond Pauline, Bauduceau Nicolas and Grelot Frédéric
French background and purpose
• Framework for an economic assessment
of farm vulnerability to flooding −Assessment at plot scale => assessment at
farm scale
Current assessment methods of agriculture vulnerability
Vulnerability assessment at the farm scale
Farm AFarm B
French background analysis
• WHY?−Policy-driven economic appraisals of flood
management projects−Agriculture lands impacted by flood management
policies−Non-structural measure efficiency can not be
appraised−Little work on agriculture vulnerability
• HOW? −Modeling flood effects on farming system
Assessing vulnerability
• Definition / assessment
• Economic appraisals: flood impacts ascertaining
and valuation − Lack of understanding of impacts− Difficulties to value intangible, indirect impacts
• Address social, financial, temporal dimensions in
vulnerability assessment
Hazard parameters :Depth of submersion
Duration of submersionSpeed
Season
Monetary damage (€)
D = V(A)
System vulnerability
Existing approaches to assess agriculture vulnerability to flood
• Agro-economic models −First work 1970 (USA) −Monetary loss due to crop damage
• Existing methods for quantifying agricultural area vulnerability to flooding do not reflect the whole impact of a project on agricultural areas
• Agriculture deemed as a sum of plots instead of an economic activity
• Example: a flooded vineyard
Plan Loire tackles the issue of agriculture
vulnerability
• Relevant scale to assess vulnerability =
farms
• A qualitative measurement of farm
vulnerability −To diagnose and reduce farm vulnerability−A tool : diagnostic handbook
• Go further => develop an approach to
quantifying farm vulnerability
Results: internal flood effects on the farming system
BuildingsDeterioration + inaccessibility
Human beings Physiological and
psychological injury
PlotsDeterioration + possible
inaccessibility
EquipmentDeterioration + possible
inaccessibility
Stock of inputDeterioration
t0 submersion
t1 post submersion
Non optimal realization of
several production cycle
Delay of investment
Loss of markets (long term)
t2 post submersion
Damage (flood effects)
Hazard parameters •Depth of submersion•Season …
Damage
t
Agricultural output
Bank
CompensationsSubsidies
Loans
Financial resources available
ProductAdded value
StateInsurance
Farmer financial resources
rep
ara
tion
Farming system
Human beings (workforce)
plot
Buildings
Equipment
Stock of input
Results: external flood effects on the farming system
Agricultural output
Financial resources available
Added value of the product
rep
ara
tion
Distribution chainDeterioration + possible
inaccessibility
Input suppliersDeterioration + possible
inaccessibility
Farming system
Human beings (workforce)
plot
Buildings
Equipment
Stock of input
Conclusions and implications in further research
• A framework for quantifying agriculture
vulnerability which integrates more effects−Mid term and long term effects−Systemic effects −Financial effects
• Compare results of Cost-Benefit Analysis −methods at plot scale / modeling at the farm scale
