With increasing attention to the ecological quality of surface water systems and the restoration of streams to their natural states, research on the vegetation effects on streams have been broadened and accelerated. NCCHE has developed the modeling capabilities of vegetation effects on flow, sediment transport and channel morphological changes in the FVM-based CCHE2D model. The vegetation effects are considered by including the drag force in the momentum equations, and the generation and dissipation of turbulent energy due to the presence of vegetation in the k and ε equations. The models have been tested by the measured data of laboratory experiments with reasonable agreement. Application of the FVM-based CCHE2D model to a real-life engineering project is being conducted in cooperation with USDA-ARS National Sedimentation Laboratory.
Large Woody Debris Structures in the Little Topashaw Creek (after D. Shields)
Flow Patterns around Alternate Vegetation Bars with Various Meandering Wavelengths Simulated by FVM-based CCHE2D
