Cyclic steps are a type of upper flow-regime bedform consisting of trains of upstream-and
upslope-migrating bed undulations. The overriding flow is characterised by a series of …

We present results of direct numerical simulation of incompressible fluid flow over a thick
bed of mobile spherically shaped particles. The algorithm is based upon the immersed …

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 …

Subaqueous and aeolian bedforms are ubiquitous on Earth and other planetary
environments. However, it is still unclear which hydrodynamic mechanisms lead to the …

The interaction of tidal currents with a cohesionless sea bottom gives rise to the appearance
of periodic morphological patterns (bedforms) characterized by wavelengths that range from …

The river networks in the plains of China are in low-lying terrain with mild bed slopes and
weak hydrodynamics conditions. Filled with intense human activities, these areas are …

Wind-blown sand creates multiscale bedforms on Earth, Mars and other planetary bodies.
According to conventional wisdom, decametre-scale dunes and decimetre-scale ripples …

There is no standard nomenclature and procedure to systematically identify the scale and
magnitude of bed forms such as bars, dunes, and ripples that are commonly present in many …

The migration rate of ripples along the streambed has a profound effect on the hyporheic
exchange and nitrogen dynamics. However, how the denitrification intermediate N 2 O is …

Fluvial instabilities originate from an interplay between the carrier fluid and the erodible
loose boundary at their interface, manifesting a variety of sedimentary architectures with …