Three-Dimensional Hole Size (3DHS) Approach for Water Flow Turbulence Analysis over Emerging Sand Bars: Flume-Scale Experiments

The many hydrodynamic implications associated with the geomorphological evolution of braided rivers are still not profoundly examined in both experimental and numerical analyses, due to generation three-dimensional turbulence structures around sediment bars. In this research, 3D velocity fields were measured through an acoustic Doppler velocimeter during flume-scale laboratory runs over emerging sand bar model, reproduce conditions real rivers, Turbulent Kinetic Energy (TKE) components analyzed discussed here detail. Given three-dimensionality water flow proximity bar, statistical analysis octagonal bursting events was applied analyze discuss different structures. main novelty study is proposal Hole Size (3DHS) analysis, used for separating extreme observed from low-intensity events.