This document summarizes a multirisk analysis project for the "Pays A3V" region in southeastern France. The project analyzed natural hazards at two scales: on a territory scale of 1,622 km2 and within two districts. At the territory scale, cartographic atlases and multi-hazard analyses were produced at a scale of 1:50,000. Within districts, recurring phenomena were inventoried, exposed elements identified, risk analyzed by hazard type and damage type, and finally multi-risk analyzed by damage type. The project aims to integrate risk management into regional planning through these analyses and policy proposals addressing prevention, regulation and crisis management.

1. The multirisk approach for the
« Pays A3V »
(Alpes de Haute-Provence – France)
Projectde projet ::
Chef manager
Nathalie Marçot
Nathalie Marçot
n.marcot@brgm.fr
n.marcot@brgm.fr
Tel +33 (0)417 20 42 42
Tel 04 91 91 17 20
Fax +33 (0)4 91 17 20 40
Fax 04 91 17 20 40
Régional Geological Survey Provence Alpes Côtes d ’Azur
Wednesday, 29 August 2012

2. Problem How to integrate all these natural
hazards in country planning to
support the decision-making
process ?
Wednesday, 29 August 2012 >2

3. Objectives
> Administrators needs (Ministry of Ecology / Region
PACA) :
On district scale
- Making Multi Risk Prevention Planning (PPR) and
spread it over several districts ;
-> for Ministry of Ecology
- Helping the districts with their development projects.
-> for the Region PACA
Wednesday, 29 August 2012 >3

4. Objectives
> Administrators needs (Ministry of Ecology / Region
PACA):
On territory scale (for the Ministry of Ecology)
- Making a geosystemic exercise over a bigger territory
than district, showing all the possible hazards, create
a communication between administrators of the
territory, and connect risk management and territory
planning ;
- Integrating solutions of risk management policy on a
territory ;
- Studying damages and impacts of multiple
risks and trying to limit their
consequences.
Wednesday, 29 August 2012 >4

5. Objectives
> Administrators needs (Ministry of Ecology / Region
PACA):
On territory scale (for the Region PACA)
- Speaking about natural disasters management
without using reglementation first, which can be
interesting for communication ;
- Leading people from different administrations
(security, mayors, management…) to talk together ;
- Speaking about all phenomenon, and not very well
known natural phenomenon or with low reccurence ;
- Integrating the season’s issue in the
analysis to introduce economics actors.
Wednesday, 29 August 2012 >5

6. Objectives of the project
> Engagement of the « Pays A3V » in a process of
sustainable development which aims to control, in
particular, the territory planning evolution ;
> The objectives of this study are :
1. An analysis of global risks across the territory,
through a cartographic atlas, and multi-hazards
analysis (at scale 1/50000),
2. A multi risk analysis (at 1/25000) concerning two
districts located in high-risk areas,
3. A proposal of risk management policy.
Wednesday, 29 August 2012 >6

7. Geographic context of « Pays A3V » (Asse, Verdon, Vaïre, Var)
Area : 1 621,93 km²
39 districts
2 natural parks(Verdon & Mercantour) and one natural reserve
Population : 10 776 inhabitants (2006), average density 6 hab/km²
FRANCE
Wednesday, 29 August 2012 >7

8. Two scales of approach A DISTRICT :
Allos & Castellane
A TERRITORY : the « Pays A3V « (1 622 km²)
Wednesday, 29 August 2012 >8

9. On territory scale  Cartographic
atlas on scale
of 1/50 000
A TERRITORY : the « Pays A3V »
 Multi
phenomenon
analysis
 Multi risk
analysis
Wednesday, 29 August 2012 >9

10. Cartography
on scale of
1/50
000
> For example :
1- Rock falls hazard
map (made by
RTM 04 service,
inside the project).
Historic events
are from the
database :
www.mouvementsdeterrai
n.fr,
RTM, and
analysis of
BRGM.
Jeudi 26 mai 2011 > 10 10
>

11. Cartography
on scale of
1/50
000
> For example :
1- Avalanche
hazard map
(made by RTM 04
service, inside the
project).
Jeudi 26 mai 2011 > 11 11
>

12. On territory scale  Cartographic
atlas on scale
A TERRITORY : the « Pays A3V »
of 1/50 000
 Multi
phenomenon
analysis
 Multi risk
analysis
Wednesday, 29 August 2012 > 12

13. Multiphenome-
non analysis
on
territory scale
> Multi hazard
cartographic
by number of
hazards
Wednesday, 29 August 2012 > 13 13
>

14. Multiphenome-
non analysis
on
territory scale
> Multi hazard
cartographic
by type of
hazards
Wednesday, 29 August 2012 > 14 14
>

15. On territory scale  Cartographic
atlas on scale
A TERRITORY : the « Pays A3V »
of 1/50 000
 Multi
phenomenon
analysis
 Multi risk
analysis
Wednesday, 29 August 2012 > 15

16. Multiphenome-
non analysis
on
territory scale
> Multi risk map
by type of
hazards
Wednesday, 29 August 2012 > 16 16
>

17. Two DISTRICTS : On district scale
Allos & Castellane
 Multipheno-
menon analysis
(reoccuring)
 Inventory and
organize into a
hierarchy of
exposed
elements
 Risk analysis by
type of natural
disasters and by
type of damage
 Multi risk
analysis by type
> 17
of damage
Wednesday, 29 August 2012 > 17

18. Multiphenomenon
analysis
(reoccurring)
> For example :
1- Historic events
of avalanche
inventory (data
from RTM 04
service).
Wednesday, 29 August 2012 > 18

19. Multiphenomenon
analysis
(reoccurring)
> For example :
1- Historic events
of rock falls and
landslides (data
from RTM 04
service & BRGM).
Wednesday, 29 August 2012 > 19

20. Multiphenomenon
analysis
(reoccurring)
> For example :
1- Reoccuring
analysis of rapid
rise in water
levels (data from
RTM 04 service).
Wednesday, 29 August 2012 > 20

21. Two DISTRICTS : On district scale
Allos & Castellane
 Multipheno-
menon analysis
(reoccuring)
 Inventory and
organize into a
hierarchy of
exposed
elements
 Risk analysis by
type of natural
disasters and by
type of damage
 Multi risk
analysis by type
> 21
of damage
Wednesday, 29 August 2012 > 21

22. Inventory of exposed elements
Localisation of principal exposed
elements in Allos
Wednesday, 29 August 2012 > 22

23. Two districts : On district scale
Allos & Castellane
 Multipheno-
menon analysis
(reoccuring)
 Inventory and
organize into a
hierarchy of
exposed
elements
 Risk analysis by
type of natural
disasters and by
type of damage
 Multi risk
analysis by type
> 23
of damage
Wednesday, 29 August 2012 > 23

24. Analyse du risque à l’échelle d’une commune
Jeudi 26 mai 2011 > 24

25. Two districts : On district scale
Allos & Castellane
 Multipheno-
menon analysis
(reoccuring)
 Inventory and
organize into a
hierarchy of
exposed
elements
 Risk analysis by
type of natural
disasters and by
type of damage
 Multi risk
analysis by type
> 25
of damage
Wednesday, 29 August 2012 > 25

26. Risk analysis on district scale
> For example results for human damages risk in winter
in Allos
Human damages risk
Strong
Medium
Low
Very low
No risk
Wednesday, 29 August 2012 > 26

27. Multirisk analysis on district scale
> Objectives and methodology
Organize risk maps by type of damage, not depending on the type of
hazard. This in order to obtain a global multirisk analysis on a district.
10
With Rij = Aj * Ej * Vij Ri = Σ Rij With i = type of damages
Ej = Vaj * Exj j = type of phenomenon
j=1
Risk = [Hazard * Exposed ele. (Exposure * Value)] * Vulnerability
Wednesday, 29 August 2012 > 27

28. Proposal of risk management policy
> Natural risk management obligations in France : the
steps of the risk Objective Taking risk into consideration
management process
Objective Lowering the
From the : Objective Reconstructing
risks
« Les risques naturels en
Provence Alpes Côte d’Azur »
Objective Anticipating
the crisis
Downloadable on http://plate-forme-risques-paca.brgm.fr
Wednesday, 29 August 2012 > 28

29. Informative reports for mayors
Proposal of risk
management policy
Public reports
Informative reports Reglementary reports
> Natural risk management
obligations in France : the
different reports used
From the :
« Les risques naturels en
Provence Alpes Côte d’Azur »
Downloadable on http://plate-forme-risques-paca.brgm.fr
Wednesday, 29 August 2012 > 29

30. Proposal of risk
management policy
> Natural risk
management
obligations in
France : the actors
of the risk
From the :
« Les risques naturels en
Provence Alpes Côte d’Azur »
Downloadable on http://plate-forme-risques-
paca.brgm.fr
Wednesday, 29 August 2012 > 30

31. Proposal of risk management policy
> Methodology
HAZARD
Existing
documents Proposals for actions
1–2–3
Information french
Natural disaster reports (DICRIM, DCS, Reglementary reports
declaration PAC, AZI, CLPA, of crisis management
(CAT NAT) + PDPFCI) + Hazard (PPR, PCS) + Hazard
Hazard
Wednesday, 29 August 2012 > 31

32. Proposal of risk management policy
> Methodology For exemple : Flood hazard
3 types of actions to Existing reports in Pays A3V
offer from the
No document
district scale to Informative reports with AZI
the territory Informative and reglementary
reports with AZI
scale :
- Prevention
plannings ;
- Reglementation
plannings ;
- Crisis
management.
Wednesday, 29 August 2012 > 32

33. Proposal of risk management policy
For exemple : Flood hazard
orts in Pays A3V Actions of :
- 1 : Prevention plannings ;
ument - 2 : Reglementation
tion reports with AZI plannings ;
tion and reglementary - 3 : Crisis management
with AZI
Wednesday, 29 August 2012 > 33

34. Propositions d’actions
> Méthodologie
Wednesday, 29 August 2012 > 34

35. Perspectives (for today / for the future)
> Multirisk approach in the territory of Durance
- High dynamic of developpement (ITER)
+ several natural phenomenon
- Prospective analysis
(Project 2012-2013)
> Comparison of french and Italian multirisk
approaches (RiskNat project) – Polytechnic Torino
- Comparison of multirisk methodologies : French Pays A3V and Italian
Piémont
- Results : various analysis scale, qualitative French approach /
conservative Italian approach
- Evaluation of the capacity to respond in case of crisis
- Work to be continued
Wednesday, 29 August 2012 > 35

36. Projectde projet ::
Chef manager Thank you
Nathalie Marçot
Nathalie Marçot
n.marcot@brgm.fr
n.marcot@brgm.fr
Tel +33 (0)417 20 42 42
Tel 04 91 91 17 20
Fax +33 (0)4 91 17 20 40
Fax 04 91 17 20 40
Service géologique Régional Provence Alpes Côtes d ’Azur
Jeudi 26 mai 2011