Concept
Pente (topographie)
Publications associées (31)
The variability of antidune morphodynamics on steep slopes
Steep streams on rough beds are generally characterised by supercritical flow conditions under which antidunes can develop and migrate over time. In this paper, we present flume experiments that we conducted to investigate the variability of antidune geome ...
2021Sharp transition in modes of dynamic crack propagation in dry-snow slab avalanche
Dry-snow slab avalanche release can be separated in four distinct phases : (i) failure initiation in a weak snow layer, (ii) onset, (iii) dynamics of crack propagation in the weak layer and eventually (iv)slab release. While a lot has been done to study th ...
2020Management of turbidity current venting in reservoirs under different bed slopes
Anton Schleiss, Giovanni De Cesare, Sabine Chamoun
The lifetime and efficiency of dams is endangered by the process of sedimentation. To ensure the sustainable use of reservoirs, many sediment management techniques exist, among which venting of turbidity currents. Nevertheless, a number of practical questi ...
Elsevier2017Snow fracture in relation to slab avalanche release: critical state for the onset of crack propagation
Johan Alexandre Philippe Gaume, Nander Wever, Jürg Schweizer, Alec van Herwijnen
The failure of a weak snow layer buried below cohesive slab layers is a necessary, but insufficient, condition for the release of a dry-snow slab avalanche. The size of the crack in the weak layer must also exceed a critical length to propagate across a sl ...
Copernicus GmbH2017The dam-break problem for eroding viscoplastic fluids.
Christophe Ancey, Belinda Margaret Bates
Natural gravity-driven flows can increase in volume by eroding the bed on which they descend. This process is called basal entrainment and is thought to play a key role in the bulk dynamics of geophysical flows. Although its study is difficult using field ...
Elsevier2017Buoyant Turbulent Kinetic Energy Production in Steep-Slope Katabatic Flow
Marc Parlange, Chad Higgins, Holly Jayne Oldroyd, Eric Richard Pardyjak
We develop several critical concepts that should be considered when interpreting, modelling and designing future experiments for flows over sloping terrain. Vertical buoyancy fluxes in katabatic flows can be positive and a source of turbulent kinetic energ ...
Springer Verlag2016Optimal slopes and speeds in uphill ski mountaineering: a field study
Kamiar Aminian, Benedikt Fasel, Philippe Vuistiner
Purpose The aim of this study is to describe the effects of speed and gradient during uphill ski mountaineering on energy expenditure, to relate any changes to changes in stride characteristics, and to determine an optimal gradient and speed allowing minim ...
Springer Verlag2016Adapting tilt corrections and the governing flow equations for steep, fully three-dimensional, mountainous terrain
Wolf Hendrik Huwald, Marc Parlange, Holly Jayne Oldroyd, Eric Richard Pardyjak
In recent studies of atmospheric turbulent surface exchange in complex terrain, questions arise concerning velocity-sensor tilt corrections and the governing flow equations for coordinate systems aligned with steep slopes. The standard planar-fit method, a ...
2016Air Entrainment in Skimming Flow on Stepped Spillways: the Effect of an Abrupt Slope Change
Anton Schleiss, Michael Pfister, José Pedro Gamito de Saldanha Calado Matos, Mohammad Javad Ostad Mirza
Numerous stepped spillways were built during the last decades. In particular, a stepped spillway may be integrated economically into the downstream face of a RCC gravity dam, or on valley flanks besides embankment or rockfill dams, where slope changes may ...
2015