Note: an installation of both FEFLOW and MIKE SHE on your machine is required for this operation!
The information available behind the DFS2 file can be linked to any FEFLOW parameter. A common application would be linking MIKE SHE's estimated groundwater recharge into FEFLOW's In/outflow on top/bottom or Sink/source.
Two types of spatial data can be imported into FEFLOW (See Fig. 1):
- punctual (i.e., point-data map)
- areal (i.e., polygon map)
When using a polygon map, a new data regionalization method (Area-weighted Projection) was developed specially to support recharge data import from MIKE SHE. Data can be imported in FEFLOW by means of the classical Link to Parameter option.
Fig. 1 - Punctual and areal representation
1. In FEFLOW, first you will need to make Sink/Source stationary (only then the tool can automatically create the time-step list based on the .dfs2) - see Fig. 2.
2. Import dfs2 as a map in the FEFLOW Maps Panel
- select type: DFS file
- select an item of dfs2
- check reference date
- select Cell data (will lead to area-weighted projection) if you select point data, e.g., for groundwater heads, the area-weighted projection will change to punctual interpolation like IDW/Kriging
Fig. 2 - Opening a DFS2 file
3. Right-click "Link to parameter" (processing will take some time...)
4. A notification may pop up, that the coordinate field has to be defined, then right-click on dfs2 map, Define Coordinates, and just click OK
5. On the left side, select with Shift all the timesteps
6. On the right side, right-click on Sink/Source, and select "Assign material data time stages" (Material Data Time Stages pops up, after being created, just click OK to close)
7. Navigate in the dropdown on the right to time-step 0, double click on it, the link is created
8. Select [mm/day] and leave it to default, which should be Area-weighted Projection
9. Wait for interpolation and assigning, this can take up to several hours for large df2 files (>500 MB) - See Fig. 3
Fig. 3 - From MIKE SHE to FEFLOW coupling. Recharge data transfer
With this workflow you will be able to transfer the recharge parameter (what is a result from a MIKE SHE model) into a FEFLOW model to further enhance the output quality of your groundwater model.
FURTHER INFORMATION AND USEFUL LINKS
FEFLOW 8.0 Documentation - Maps