Effects of Roughness Geometries on Sediment Deposition and Self-Lining Processes Between Strip Roughness Elements

Key Points

• This research aims to understand how different roughness geometries affect flow behavior and sediment deposition.
• Examined two roughness shapes: triangular and rectangular prisms.
• Conducted flow measurements using PIV (Particle Image Velocimetry).
• Performed sediment input experiments to assess bed coverage and sediment filling rates.
• Stable backflow regions formed behind rectangular prisms, while triangular prisms created high-speed downward flows from the top.
• Significant surface fluctuations occurred with triangular prisms compared to rectangular ones.
• Rectangular prisms maintained high bed coverage even in static equilibrium, whereas triangular prisms experienced erosion, resulting in lower coverage rates.