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Last name: MELUN
First name: Gabriel
International audience
Documenting and interpreting channel responses to catastrophic floods help understanding how rapid fluvial metamorphosis can propagate in a catchment under sediment cascading effects. The recent example of the October 2020 Storm Alex in SE France (~ 500 mm of rain in 24 h) provides a unique opportunity to investigate major geomorphic responses...
On October 2nd, 2020, under the combined effect of the winter Alex storm formed off the Brittany coast, and a strong Mediterranean episode, very intensive rainfalls affected in the south eastern France, both Roya and Vésubie catchments (locally up to 600 mm in 24h). This paroxysmal event with a heavy human toll (10 dead, 8 missing) generated...
During major floods, rivers erode their banks and thus recruit large wood pieces from the riparian zones. There is still a lack of knowledge about the transport of large wood, the volumes involved and the flux distribution, i.e. the large wood connectivity at catchment scale. During storm Alex (October 2020), the French Roya catchment (394 km2)...
International audience
National audience
Storm Alex, which hit France between 1 and 2 October 2020, caused an exceptional Mediterranean episode in the southeast of France on October 2 and 3, with unprecedented magnitude debris floods in the Roya and Vésubie valleys, major morphological changes and heavy human and material damages. A technical feedback was carried out at the request of...
Strom Alex -Lessons learned from the debris-floods that occurred on 2 October 2020 in the French South-East Alps ABSTRACT Storm Alex, which hit France between 1 and 2 October 2020, caused an exceptional Mediterranean episode in the southeast of France on October 2 and 3, with unprecedented magnitude debris floods in the Roya and Vésubie...
Fieldtrip of the Hydrosystems' Commission of the CNFG (French National Committee of Geography), July 2023. Fieldtrip organized by Margot Chapuis (Université Côte d'Azur, UMR 7300 ESPACE) thanks to the help of the Hydrosystems' Commission supervisors: Anaëlle Vayssière and Ludovic Drapier.
Ce dataset regroupe le rapport de retour d'expérience et ses annexes. Il a été rédigé par l'ONF-RTM, l'ONF-DRN et INRAE ETNA, appuyés de chercheurs ayant contribué à l'analyse. Il visait à documenter et analyser les crues torrentielles qui ont touché le bassin versant de la Roya pendant la tempête Alex. Ce retour d'expérience technique a été...