Author(s): Mirko Musa; Chien-Yung Tseng; Jiyong Lee; Michele Guala

Linked Author(s): Mirko Musa

Keywords: Submerged vanes; Sediment training; Fluid-sediment-structure interaction; Lateral bedload; Bedforms; Bathymetry scan

Abstract: This study investigates how a yawed array of porous submerged vanes can redirect bedload laterally in a large quasi-field-scale open channel under live -bed conditions. To measure this redirection, we introduce a new methodology that merges Lagrangian bedform tracking, Eulerian remapping of transport fields, and a mass- conservative control-volume analysis. This approach enables the quantitative estimation of lateral bedload transport directly from bathymetric data. Experiments with and without the vane array reveal that the structures generate coherent lateral steering of migrating bedforms and produce a marked cross-channel modulation of streamwise sediment transport. The induced lateral transport reaches 9–18% of the domain -averaged streamwise rate, and its peak occurs near the third vane row. The methodology also identifies the streamwise location where laterally steered sediment converges, providing critical guidance for sediment -bypass system design.

DOI: https://doi.org/10.64697/iahr.proc.ise2026.abs.314

Year: 2026