Data

Selecting dispersion coefficient option the format of the dispersion coefficient can be specified as

·         Constant (in both time and domain)

·         Varying in domain

For the case with dispersion coefficient varying in domain the values are con­stant in the vertical domain (in case of 3D simulation) and only varying in the horizontal domain. You have to prepare a data file containing the disper­sion coefficient 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, a piecewise con­stant interpolation is used to map the data. If a dfs2-file is used, a bilinear interpolation is used to map the data.

Selecting Scaled eddy viscosity option the format of the scaling factor can be specified as

·         Constant

·         Varying in domain

For the case with values varying in domain you have to prepare a data file containing the scaling factor before you set up the hydrodynamic simulation. For a 2D simulation the file must be a 2D unstructured data file (dfsu) or a 2D data grid file (dfs2). For a 3D simulation the file must be a 3D unstructured data file (dfsu) or a 3D data grid file (dfs3). The area in the data file must cover the model area. If a dfsu-file is used, a piecewise constant interpolation is used to map the data. If a dfs2-file or a dfs3-file is used, a bilinear interpola­tion is used to map the data.