Concept

Aeolian processes

Publications associées (175)

Fluid dynamics of basal entrainment by geophysical gravity-driven flows

Geophysical gravity-driven flows -- including avalanches, debris flows, pyroclastic flows and submarine turbidity currents -- are multiphase natural hazards that flow under the influence of gravity. Despite their differences, they share much of the same ph ...

EPFL2015

Numerical modelling of energy piles in saturated sand subjected to thermo-mechanical loads

Lyesse Laloui, Alessandro Francesco Rotta Loria, Chao Shi

This study investigates the impact that different magnitudes and combinations of thermal and axial mechanical loads have on the mechanical behaviour of energy piles in saturated sand. The work is based on the results of a series of thermo-hydro-mechanical ...

2015

Experimental characterization of vegetation uprooting by flow

Paolo Perona, Benoît Crouzy, Katharina Maria Edmaier

We investigate vegetation uprooting by flow for Avena sativa seedlings with stem-to-sediment size ratio close to unity and vanishing obstacle-induced scouring. By inducing parallel riverbed erosion within an experimental flume, we measure the time-to-uproo ...

2015

Experimental evaluation of the discharge capacity of flow constrictions by check dams in mountain rivers

Anton Schleiss, Mário Jorge Rodrigues Pereira Da Franca, Sebastian Schwindt

Open check dams are built to retain bed load in case of major floods and may have filtering, sieving as well as dosing effects on sediment transport. The combination of an upstream reservoir with an open check dam is designated as bed load trap. These stru ...

2015

A locally calibrated, late glacial Be-10 production rate from a low-latitude, high-altitude site in the Peruvian Andes

Katherine Colby Leonard

Well-dated records of tropical glacier fluctuations are essential for developing hypotheses and testing proposed mechanisms for past climate changes. Since organic material for radiocarbon dating is typically scarce in low-latitude, high-altitude environme ...

Elsevier Sci Ltd2015

A locally calibrated, late glacial 10Be production rate from a low-latitude, high-altitude site in the Peruvian Andes

Katherine Colby Leonard

2015

Sediment diffusion in deterministic non-equilibrium bed load transport simulations

Christophe Ancey

The objective of this paper is to examine the importance of sediment diffusion relative to advection in bed load transport. At moderate bottom shear stress, water turbulence is too weak for picking up and keeping particles in suspension and so shallow wate ...

Elsevier2015

3-D simulations of snow transport, erosion and deposition using a Large Eddy Simulation coupled with a Lagrangian Stochastic Model

Michael Lehning, Katherine Colby Leonard, Francesco Comola, Ernesto Trujillo Gomez, Marco Giovanni Giometto

The development of reliable models of near surface snow-atmosphere interactions from small to large scale is motivated by the need for a better understanding of the fluid- and morpho-dynamic processes in Polar environments. These interactions drive observe ...

2015

Reservoir sedimentation management at Gebidem Dam (Switzerland)

Tobias Meile

The Gebidem Dam located on the Massa River intercepts annually around 400’000 m3 of solid material. These sediments must be evacuated by annual flushing of the reservoir over 4 to 7 days. A trend for silting in the flushing channel was observed during the ...

CRC Press/Balkema2014

Sediment transport and flow conditions in steep rivers with large immobile boulders

Tamara Ghilardi

In steep mountain rivers, morphological features such as large mostly immobile boulders, strongly influence flow behavior and bedload transport. Without taking into account these large immobile boulders, which are acting as macro-roughness elements, classi ...

EPFL - LCH2014

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