Quasi two-dimensional model for straight overbank flows through emergent vegetation on floodplains

摘要: The paper presents a quasi two-dimensional (2D) model calculating depth-averaged velocity and bed shear stress in straight compound channel with vegetated floodplain. numerically solves the Navier–Stokes equation for streamwise motion of flow (quasi 2D). Reduction volume water due to vegetation is modelled as porosity. Drag force an additional momentum sink term equation. Estimation methods parameters—drag coefficient, shading factor, porosity, friction eddy viscosity advection term—are discussed. predictive capability assessed against experimental data regard distributions velocity, stress, transverse stage-discharge. results show that 2D reproduces reasonable simulation field.