EROSION PROCESSES IN GRANULAR FLOWS
Gravitational instabilities such as avalanches and pyroclastic flows represent a major hazard in seismic, mountainous and coastal areas.
A burning issue is to explain the great mobility of these phenomena. Recent studies [see e.g. Mangeney et al., 2010] showed that erosion and entrainment of previous deposits by the flow plays a crucial role on flow mobility.
Granular columns were released in an inclined channel covered (or not) by an erodible bed of same material.
A burning issue is to explain the great mobility of these phenomena. Recent studies [see e.g. Mangeney et al., 2010] showed that erosion and entrainment of previous deposits by the flow plays a crucial role on flow mobility.
Granular columns were released in an inclined channel covered (or not) by an erodible bed of same material.
CHARACTERIZATION OF GRANULAR FLOWS FROM THEIr seismic signal
Gravitational instabilities (avalanches, rockfalls) constitute a major hazard for population in mountainous, seismic and volcanic areas.
They are however very dangerous to observe directly.
Recent studies showed that avalanches and rockfalls can by detected by their seismic signals and localized and characterized (volume, duration,...).
They are however very dangerous to observe directly.
Recent studies showed that avalanches and rockfalls can by detected by their seismic signals and localized and characterized (volume, duration,...).