Concept
Aeolian processes
Publications associées (175)
Morpho-dynamics of mountain streams: from laboratory experiments to field observations.
Christophe Ancey, Stuart Nicholas Lane, François Mettra
Due to the complexity of mountain stream evolution and its causes, it is judicious to conduct flume experiments to better understand the morpho-dynamics of steep river channels. A series of long-term experiments under steady conditions revealed the high in ...
2017Energy- and momentum-conserving model of splash entrainment in sand and snow saltation
Michael Lehning, Francesco Comola
Despite being the main sediment entrainment mechanism in aeolian transport, granular splash is still poorly understood. We provide a deeper insight into the dynamics of sand and snow ejection with a stochastic model derived from the energy and momentum con ...
American Geophysical Union2017Using SAS functions and high-resolution isotope data to unravel travel time distributions in headwater catchments
Andrea Rinaldo, Paolo Benettin, Gianluca Botter
We use high-resolution tracer data from an experimental site to test theoretical approaches that integrate catchment-scale flow and transport processes in a unified framework centered on selective age sampling by streamflow and evapotranspiration fluxes. T ...
American Geophysical Union2017The role of the hyporheic flow on sediment transport processes : an experimental approach using particle image velocimetry.
Christophe Ancey, Gauthier Paul Daniel Marie Rousseau, Daniel Vito Papa, Angeliki Sklivaniti
The study of river dynamics usually considers a turbulent stream on an impervious bed. However, it is known that part of the total discharge takes place through the erodible bed, especially for mountain rivers. This hyporheic flow (or subsurface flow) is l ...
2017Hydrodynamics of mountain-river confluences and its relationship to sediment transport
Mário Jorge Rodrigues Pereira Da Franca, Sebastián Guillén Ludeña
Mountain confluences are characterized by narrow and steep tributaries that provide important sediment load to the confluence, whereas themain channel supplies the dominant flow discharge. This results in a marked bed discordance between the tributary and ...
American Geophysical Union2017Linear scaling of precipitation-driven soil erosion in laboratory flumes
David Andrew Barry, Seifeddine Jomaa
The proportionality between raindrop-driven soil erosion delivery and area of soil exposed to raindrops under a uniform precipitation rate was investigated in terms of individual size classes using laboratory flume experiments. In particular, we examined t ...
Elsevier Science Bv2017A multiscale model for sediment impact erosion simulation using the finite volume particle method
François Avellan, Ebrahim Jahanbakhsh, Audrey Paulette Solange Maertens, Sebastián Camilo Leguizamón Sarmiento, Siamak Alimirzazadeh
The erosion of a surface by a sediment-laden flow is an inherently multiscale phenomenon which includes physical interactions covering many orders of magnitude in both length and time scales. Conforming to the nature of the problem, we propose a novel mult ...
2017Hydro-morphological processes through permeable sediment traps at mountain rivers
In alpine regions, villages are often situated near alluvial fans, which are fed by mountain rivers transporting high sediment load during floods. In the past, these mountain rivers on the alluvial fans have often been channelized near urbanized areas, whe ...
EPFL-LCH2017Buckling patterns in biaxially pre-stretched bilayer shells: wrinkles, creases, folds and fracture-like ridges
Pedro Miguel Nunes Pereira de Almeida Reis
We introduce a new experimental system to study the effects of pre-stretch on the buckling patterns that emerge from the biaxial compression of elastomeric bilayer shells. Upon fabrication of the samples, releasing the pre-stretch in the substrate through ...
Royal Society of Chemistry2017