8.4 Bottom Drag

8.4.1 Command Status

Optional - Coupled sediment transport bed roughness may be enabled to modify the 2D HD simulation class bottom roughness definition.

8.4.2 Description

The sediment control file includes an option to couple the hydrodynamic bottom drag model with the sediment transport module. When enabled, the hydrodynamic bottom roughness is set to the same value calculated by the sediment transport module. This coupling is only available when the ks bottom drag implementation is specified using Bottom Drag Model == ks. No additional configuration in the TUFLOW FV control file is required.