Standard

A standard source is used to specify an additional rate of bed level change in the domain. The data can be specified as:

·         Constant (in time and domain)

·         Constant in time, varying in domain

·         Varying in time and domain

If the bed level source is specified by a constant additional rate of bed level change you have to specify the additional rate directly.

For the case with constant in time but varying in domain you have to prepare a data file containing the additional rate of bed level change. 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 piecewise constant interpolation is used to map the data. If a dfs2-file is used bilinear interpola­tion is used to map the data.

For the case with varying in time and domain you have to prepare a data file containing the additional rate of bed level change. 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 piecewise constant inter­polation is used to map the data. If a dfs2-file is used bilinear interpolation is used to map the data. The data must cover the complete simulation period. The time step of the input data file does not, however, have to be the same as the time step of the hydrodynamic simulation. A linear interpolation will be applied if the time steps differ.