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Welcome to the next generation MIKE+ Documentation

2D AD Initial Conditions

The format of the initial concentration (in component unit) for each component can be specified as:

  • Uniform (in domain)
  • Varying in domain.

For the case with varying in domain, you can prepare a data file containing the concentration (in component unit) before you set up the Advection-Dispersion simulation, and use it with source type ‘2D file’.

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.

In case the input data file contains a single time step, this field is used. In case the file contains several time steps, e.g. from the results of a previous simulation, the actual starting time of the simulation is used to interpolate the field in time. Therefore, the starting time must be between the start and end time of the file.

Alternatively, you can select the source type 'MIKE+ 2D AD initial condition layer' to assign constant values to a number of polygons drawn on the map, or select the source type 'Background layer' if a file (e.g. shape file) containing polygons and an attribute holding the dispersion coefficient, is available.

2DADinitialConditions_2022.png 

Figure: 2D AD Initial Conditions editor