The physics of sediment transport initiation, cessation, and entrainment across aeolian and fluvial environments

T Pähtz, AH Clark, M Valyrakis… - Reviews of …, 2020 - Wiley Online Library
Predicting the morphodynamics of sedimentary landscapes due to fluvial and aeolian flows
requires answering the following questions: Is the flow strong enough to initiate sediment …

Entrainment and motion of coarse particles in a shallow water stream down a steep slope

C Ancey, AC Davison, T Böhm, M Jodeau… - Journal of Fluid …, 2008 - cambridge.org
We investigate the entrainment, deposition and motion of coarse spherical particles within a
turbulent shallow water stream down a steep slope. This is an idealization of bed-load …

A microstructural approach to bed load transport: mean behaviour and fluctuations of particle transport rates

C Ancey, J Heyman - Journal of Fluid Mechanics, 2014 - cambridge.org
This paper concerns a model of bed load transport, which describes the advection and
dispersion of coarse particles carried by a turbulent water stream. The challenge is to …

Statistical description of sediment transport experiments

C Ancey, T Böhm, M Jodeau, P Frey - … E—Statistical, Nonlinear, and Soft Matter …, 2006 - APS
A longstanding problem in the study of sediment transport in gravel-bed rivers is related to
the physical mechanisms governing bed resistance and particle motion. To study this …

Bedload: a granular phenomenon

P Frey, M Church - Earth Surface Processes and Landforms, 2011 - Wiley Online Library
Bedload, the transport of sediment remaining in contact with the stream bed, has mainly
been studied from the perspective of the correlation between fluid driving forces and the …

Stochastic modeling in sediment dynamics: Exner equation for planar bed incipient bed load transport conditions

C Ancey - Journal of Geophysical Research: Earth Surface, 2010 - Wiley Online Library
Even under flow equilibrium conditions, river bed topography continuously evolves with
time, producing trains of irregular bed forms. The idea has recently emerged that the …

Entrainment, motion, and deposition of coarse particles transported by water over a sloping mobile bed

J Heyman, P Bohorquez… - Journal of Geophysical …, 2016 - Wiley Online Library
In gravel bed rivers, bed load transport exhibits considerable variability in time and space.
Recently, stochastic bed load transport theories have been developed to address the …

Lagrangian and Eulerian description of bed load transport

F Ballio, D Pokrajac, A Radice… - Journal of …, 2018 - Wiley Online Library
Sediment particles transported as bed load undergo alternating periods of motion and rest,
particularly at weak flow intensity. Bed load transport can be investigated by either following …

Particle velocity and concentration profiles in bedload experiments on a steep slope

P Frey - Earth Surface Processes and Landforms, 2014 - Wiley Online Library
Depth profiles of particle streamwise velocity, concentration and bedload sediment transport
rate were measured in a turbulent and supercritical water flow. One‐size 6 mm diameter …

Spatial correlations in bed load transport: Evidence, importance, and modeling

J Heyman, HB Ma, F Mettra… - Journal of Geophysical …, 2014 - Wiley Online Library
This article examines the spatial dynamics of bed load particles in water. We focus
particularly on the fluctuations of particle activity, which is defined as the number of moving …