An erodible bed sheared by a fluid flow, gas or liquid, is generally unstable, and bed forms
grow. This review discusses the following issues, in light of the recent literature: What are the …

Research into fluvial dunes spans disciplines, studies at grain to reach scales, and
methodological approaches that include theoretical, experimental, numerical and field …

The paper reviews in condensed form and from a historical perspective the various methods
for treating and simulating turbulence and its effects in hydraulic flows. After highlighting the …

We develop a coupled hydro-morphodynamic numerical model for carrying out large-eddy
simulation of stratified, turbulent flow over a mobile sand bed. The method is based on the …

It is widely accepted that both ripples and dunes form in rivers by primary linear instability;
the wavelength of the former scaling on the grain size and that of the latter being controlled …

The kinematics and morphodynamics of low‐amplitude, small‐scale sand waves developed
over migrating dunes are examined using data drawn from laboratory experiments. We refer …

Trains of secondary bedforms, superimposed on primary dunes, have been observed in
rivers worldwide. To date, it has remained unclear how these secondary bedforms affect the …

Predicted bedload fluxes often have large errors partly because calculations usually do not
include spatial and temporal flow variability. Sediment motion is driven by a temporal …

Sediment transport in sand‐bedded alluvial channels is strongly conditioned by bedforms,
the planimetric morphology of which can be either two‐or three‐dimensional. Experiments …

Bed load transport and erosion in fine sediment beds are mainly driven by the dynamics of
the near‐bed turbulent flow. In situations when the shear stress is not sufficiently high to …