Bedload
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Recent papers in Bedload
Experimental studies of subcritical, unidirectional flow over upper stage plane beds of medium grained sand reveal the ubiquitous presence of low amplitude bedwaves. Flow depth was 0·11 m, mean flow velocities were 0·86–1·0 m s−1, shear... more
Bar instability is recognized as the fundamental mechanism underlying the formation of large scale forms of rivers. We show that the nature of such instability is convective rather than absolute. Such result is obtained by revisiting the... more
A three-dimensional moment analysis defines both particle mobility and the average orientation angle of moving bedload particles in meander bends.Accordingly, under identical bed shear stress and near-bed streamline orientation angle on a... more
The sediment transport model SEDTRANS has been significantly upgraded based on new advances in both cohesive and non-cohesive sediment transport studies. For given input data of wave, current, and seabed conditions, the model applies the... more
Changes in armour layer during floods under supply limited conditions are little known. This paper describes the breakup and the reestablishment of the bed armour layer in the regulated gravel-bed Ebro River during a flooding period. The... more
Dams disturb in the fluvial dynamics by changing the natural cycle of the rivers, interfering with the transport-deposition processes and affecting river ecology. The Brazilian part of the Paraná Basin has the largest hydrometrical power... more
Internally, the sandwaves show decimetre-scale, herring-bone cross-laminated sets with inclined and horizontal set boundaries representing accretion on the gently inclined (around 5°) lee and stoss surfaces of the sandwaves respectively.... more
By means of surveys carried out with a Phase Measuring Bathymetric System and current profiles obtained through an ADCP of the internal area of the Bahía Blanca estuary, a field of large dunes was analysed. There are two different and... more
The thickness of the bedload layer is a crucial parameter for evaluating sediment transport rates in open channel flow, but it is often determined empirically. Based on the concept of the hydrodynamic diffusion related to... more