The mountains located near the French Mediterranean coast are regularly subject to severe rainfalls, and consequently to torrential floods. On 3rd, Oct. 2015, a dramatic flood occurred in the region between Cannes and Nice (twenty peoples died, 550-650M€ of losses). Three rivers experience particularly dramatic floods in 2015:
-The Riou de l’Argentière (47 km², mountainous basin),
-The Frayères (22 km², rural headwaters, urban lowlands),
-The Brague (68 km², rural and forested basin, urban lowlands).
The latter has been chosen as DEMO site for its bigger size, greater diversity and more numerous data.
Nature Based Solutions
- Optimized forest management with adapted protection structures are assumed to improve torrential flood mitigation.
- Both population and economy benefit from them.
- Natural Assurance Scheme are to be defined
-Local cities and rivers managers (Water Agency) -> Final users
-Local administration and decision makers -> decision power
-Environment protection association -> natural areas’ manager
-Insurance companies and CCR -> Insurance business managers
Main Outcomes Sought
-Improved knowledge on torrential flood processes (wildfires and woody debris aggravation roles, etc.).
-Definition of alternative insurance business models and new multi-criteria decision making tools accounting for ecosystems and protection systems effectiveness.
Methods and data to be used
-Hazard mapping (historical analysis, deterministic approaches and expert assessments)
-Damage mapping (CCR damage database, improved vulnerability curves, new hazard maps)
-Multicriteria decision making methods (decision context, improved method to account for NBS)