Concept
Bioturbation
Publications associées (79)
Ultrasonic sediment flux profiling with ACVP Technology: application to sediment-laden Boundary Layer flows
Giovanni De Cesare, David Hurther
Sediment transport in geophysical boundary layer flows has relevance to a broad spectrum of sciences ranging from the physical and chemical, to the biological, ecological and geological. Advances in sediment transport modelling and prediction strongly suff ...
2023Experimental characterization of root-reinforced riparian sediment deposits in a restored and widened river course
Giovanni De Cesare, Paolo Perona
The Arbogne River is located mainly in the Swiss canton of Fribourg. The River was meandering through the plane at a very low gradient and several exceptional historic floods with large sediment accumulation are mentioned. After important river training wo ...
2023Influence of the shear stress on fine sediment exchanges with the substrate using UVP measurements
Giovanni De Cesare, Romain Maxime Dubuis
The dynamic of fine sediment in rivers is closely related to the interactions between fine particles, the riverbed and the flow conditions. The accumulation of fine sediment in the riverbed reduces vertical water exchanges and can have detrimental effects ...
2023Spatial and temporal heterogeneity of methane ebullition in lowland headwater streams and the impact on sampling design
Headwater streams are known sources of methane (CH4) to the atmosphere, but their contribution to global scale budgets remains poorly constrained. While efforts have been made to better understand diffusive fluxes of CH4 in streams, much less attention has ...
2021The variability of antidune morphodynamics on steep slopes
Steep streams on rough beds are generally characterised by supercritical flow conditions under which antidunes can develop and migrate over time. In this paper, we present flume experiments that we conducted to investigate the variability of antidune geome ...
2021Density-dependent solute transport in a layered hyporheic zone
David Andrew Barry, Mohsen Cheraghi, Qihao Jiang, Jing Xu
Hyporheic exchange is affected by bedform geometry, which induces complex flow paths within the bedform. Additional factors that influence flow and solute transport in the hyporheic zone are layered profile sediments and density-driven flow. This study exp ...
ELSEVIER SCI LTD2020Numerical Simulations of an Innovative Water Stirring Device for Fine Sediment Release: The Case Study of the Future Trift Reservoir
Pedro Filipe De Almeida Manso, Azin Amini, Anass Chraibi
Reservoir sedimentation and consequently lack of storage volume and perturbation of the operation of intakes and bottom outlet is a key challenge affecting both hydropower production as well as dam safety and flood management. In the framework of a peer-re ...
Springer2020Estimating Mean Bedload Transport Rates and Their Uncertainty
Measuring bedload transport rates usually involves measuring the flux of sediment or collecting sediment during a certain interval of time Δt. Because bedload transport rates exhibit significant non‐Gaussian fluctuations, their time‐averaged rates depend a ...
2020Towards simple tools to assess functional effects of contaminants on natural microbial and invertebrate sediment communities
Surface sediments can accumulate contaminants that affect microorganisms and invertebrates and disturb benthic ecological functions. However, effects of contaminants on ecological functions supported by sediment communities are understudied. Here, we teste ...
SPRINGER HEIDELBERG2020Transport of zinc ions in the hyporheic zone: Experiments and simulations
Large amounts of toxic metals are discharged into rivers and lakes, but little is known about the factors that drive the adsorption and transformation of these metals in the hyporheic zone and the exchange flux across the sediment-water interface. To bette ...
2020