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Diagnostic du fonctionnement d'un bassin versant générateur de laves torrentielles et estimation de l'aléa : le cas du Réal (Alpes-Maritimes, France)

Authors: Chambon, Guillaume; Richard, D.; Segel, V.;

Diagnostic du fonctionnement d'un bassin versant générateur de laves torrentielles et estimation de l'aléa : le cas du Réal (Alpes-Maritimes, France)

Abstract

Cet article synthétise les résultats d'une étude détaillée concernant le torrent du Réal (commune de Péone, Alpes-Maritimes). Malgré la superficie modeste de son bassin versant, ce torrent est un gros producteur de laves torrentielles. En outre, son lit est caractérisé par un phénomène d'exhaussement très spectaculaire. Le diagnostic réalisé aborde tous les aspects du fonctionnement du torrent : hydrologie, identification des sources sédimentaires, caractérisation rhéologique et hydraulique des écoulements de laves torrentielles, évolution du lit depuis 1950, rôle des ouvrages de correction déjà implantés et qualification des aléas au niveau des enjeux principaux. Un scénario d'évolution future de l'activité torrentielle est proposé, et les grands axes d'un éventuel programme de protection à venir sont définis. / This paper presents a detailed functional analysis of the Réal torrent (Péone township, Alpes-Martitimes). Despite a relatively small catchment area, this torrent is a huge producer of debris flows. Its bed is characterized by a marked aggradation phenomenon. The performed analysis treats all aspects of torrential processes: hydrology, identification of sedimentary sources, rheological and hydraulic characterization of debris flows, bed evolution since 1950, role of existing torrent control structures, and qualification of hazards. A scenario for future evolution of the torrential activity is proposed, and the main axes of a possible control and protection program are defined.

Country
France
Keywords

[SDE] Environmental Sciences, étude de cas, bassin versant torrentiel, dimensionnement, LAVE TORRENTIELLE, SEDIMENT, Environmental technology. Sanitary engineering, crue torrentielle, Environmental sciences, TORRENT, dynamique torrentielle, PRECIPITATION, [SDE]Environmental Sciences, ouvrage de protection, GE1-350, TD1-1066, PEONE, REAL COLLOBRIER BASSIN VERSANT, ALPES MARITIMES

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    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
3
Average
Average
Average
Green
gold