5. Results‎ > ‎

F/ Resilience

The resilience of a system in flood management is the capacity to absorb the damage generated due to flood events, the ability of the system to organize itself and preserve its structures, functions and recovery capacity.

The resilience is the concept associated to the evolution of the flood management systems. The risk is the product of the vulnerability and exposure to threats to the performance of the system.
 
The Flood Resilience Index (FRI) is a methodology proposed by Jelena BATICA with the objective to normalize the evaluation of the resilience in flood management.

The principal hypothesis are:

- Flooding processes in urban systems.
- Interconnection between natural, physical, economic, social and institutional systems exist and their separation is arbitrary.
- Simplification of problem based on the study of 5 different aspects as base of the analysis:

o Natural
o Physical
o Economical
o Social
o Institutional

- Four different quantitative methods of analysis depending on the spatial scale:ç

o Parcel/building
o Block
o District
o City

The results represent the performance of the urban system in front of flood events in the 5 different aspects.

Study case: Parcel and city scale FRI analysis in Nice


The objective of the FRI in analysis is the assessment of the public/private investments in the management of flood events. In our study case, the urban system of nice, we need first to evaluate the actual system performance using the FRI in the parcel scale. With the results we can identify the areas of the city that have the worst FRI by determining an FRI for each building. This analysis is the base for the proposal of the different policies that should define the future scenarios. These scenarios will be compared using the FRI for city scale.

The performance is based on the quantitative estimation of the function resilience based on a qualitative description. For each building, a weighting for each dependence was assigned and then the availability value (re,ri) was adjusted based on flood depth. The FRI map for the buildings in Nice is shown below.

After determining the FRI for each building, we assessed various flood management plans and how they would change the FRI values for the city. We propose the following policies:

- Flood Risk Management Plan (Scenario 1)
- Education plan (Scenario 2)
- Creation of a team of professionals associated to the public administration (Scenario 3)
- Emergency and land use plan (Scenario 4)

The changed FRI Values for the different scenarios are shown in the table below. Scenario 0 is the scenario with no changes made.

Scenario-0

Scenario-1

Scenario-2

Scenario-3

Scenario-4

natural

3,00

3,00

3,00

3,00

3,50

social

2,00

2,90

3,03

2,20

2,00

economic

2,58

3,00

2,58

2,58

2,58

institutional

2,66

3,09

3,11

3,27

2,66

physical

2,57

3,01

2,57

2,57

2,69

Total

2,55

3,02

2,79

2,71

2,61



ĉ
megan FOTHERGILL,
22 Feb 2017, 02:40
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