Author(s): Sujin Kim; Hyoseop Woo
Linked Author(s): Hyoseop Woo
Keywords: Vegetated Channels Flow Resistance Turbulence Modeling Dynamic Vegetation Modeling Climate Change Adaptation
Abstract: Flow resistance in vegetated channels plays a crucial role in regulating hydraulic dynamics, sediment transport, and ecological processes. Vegetation significantly alters the flow regime, with varying effects depending on factors such as vegetation type (e. g., emergent vs submerged), spatial arrangement (e. g., individual plants vs patch), flexibility, and structural complexity. Over time, numerical models have evolved to capture these interactions, accounting for a diverse range of vegetation characteristics and addressing the increasing complexity of vegetation dynamics and flow interactions. This review highlights the progression of numerical methods employed in flow resistance modeling, focusing on turbulence models such as Reynolds-averaged Navier-Stokes (RANS), Large Eddy Simulation (LES), and Direct Numerical Simulation (DNS). Furthermore, we examine case studies comparing these models and assess their accuracy and validation methods. Hybrid modeling approaches, which combine traditional computational fluid dynamics (CFD) techniques with machine learning methods, are also discussed. The paper concludes by emphasizing the importance of interdisciplinary collaboration among hydraulics, ecology, and climate sciences and suggesting how the findings can inform policy decisions and flood risk management strategies.
Year: 2025