The bed density can be specified as:
· Constant (in domain)
· Varying in domain
The bed density is defined as the dry density.
For the case with varying in domain you have to prepare a data file containing the bed density 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.