Bedload and water column traps were used with simultaneous wind and water velocity measurements to study postlarval macrofaunal dispersal dynamics in Manukau Harbour, New Zealand. A 12-fold range in mean wind condition resulted in large differences in water flow (12-fold), sediment flux (285-fold), and trap collection of total number of individuals (95-fold), number of the dominant infaunal org...

Abstract. Substantial uncertainties in bedload transport predictions steep streams have encouraged intensive efforts towards the development of surrogate monitoring technologies. One such system, Swiss plate geophone (SPG), has been deployed and calibrated numerous channels, mainly Alps. Calibration relationships linking signal recorded by SPG system to intensity characteristics transported can...

Acoustic Doppler current profilers (ADCP) were deployed to investigate the backscattering (BS) signal in three navigable rivers, different bedload transport conditions. This study aims demonstrate that BS strength, as an additional variable apparent velocity, improves characterization of using ADCPs. The M9 –3 MHz and vertical beam – 0.5 showed decline strength intensity increased, whereas RDI ...

Improvements upon the Birkbeck bedload sampler (Reid et al., 1980) were implemented in the North Fork of Caspar Creek, a gravel-bedded stream draining 383 ha in northern coastal California. Bedload sediment falls through a slotted plate covering a .125-m steel box set within a formed concrete pit in the streambed. In the original Birkbeck design, a water-filled pressure pillow beneath the box r...

The coast of the Emilia-Romagna Region in northern Italy consists about 210 km sandy beaches that have been attracting tourists for decades. Since 1980s, erosion processes resulted a remarkable beach retreat, notwithstanding construction several protections works. In 2005–2006 and 2017–2020, 30 floods two small rivers feeding Ravenna, Fiumi Uniti Savio, were monitored bedload was measured with ...

In this work efficient semi-implicit methods for sediment bedload transport models with gravitational effects under subcritical regimes is proposed. Several families of are presented and rewritten a general formulation that allows us to apply the method. numerical tests we focus on application generalization Ashida-Michiue model, which includes gradient both fluid surface. Analytical steady sta...

Preliminary results are reported from an experimental study of the interaction between turbulence, sediment transport and bedform dynamics over the transition from dunes to upper stage plane beds. Over the transition, typical dunes changed to humpback dunes (mean velocity 0.8 ms-', depth 0.1 m, mean grain size 0.3 mm) to nominally plane beds with low relief bed waves up to a few mm high. All be...