Data

The bed roughness can be specified as:

·         Constant (in domain)

·         Varying in domain

The bed roughness is defined as the Nikuradse roughness (k_n).

For the case with varying in domain you have to prepare a data file containing the bed roughness before you set up the hydrodynamic simulation. The file must be a 2D unstructured data file (dfsu) or a 2D grid data file (dfs2). The area in the data file must cover the model area. If a dfsu-file is used, piece­wice constant interpolation is used to map the data. If a dfs2-file is used, bilin­ear interpolation is used to map the data.