MODFLOW Adapter¶
This adapter enables use of MODFLOW models within the MIKE Workbench.
About MODFLOW¶
MODFLOW is the USGS's modular hydrologic model. MODFLOW is considered an international standard for simulating and predicting groundwater conditions and groundwater/surface-water interactions.
The first version of MODLFOW was published in 1984. MODFLOW's modular structure has provided a robust framework for integration of additional simulation capabilities that build on and enhance its original scope. The family of MODFLOW-related programs now includes capabilities to simulate coupled groundwater/surface-water systems, solute transport, variable-density flow (including saltwater), aquifer-system compaction and land subsidence, parameter estimation, and groundwater management.
Please refer to MODFLOW and Related Programs for more information.
Prerequisites¶
The configuration and execution of a MODFLOW model in MIKE OPERATIONS using this adapter will require
- An executable application to run the MODFLOW model.
MODFLOW model setup¶
No specific configuration of a MODFLOW model setup has to be followed in order to register it into the MIKE Workbench.
Model Object Types¶
The table below shows how the MODFLOW model objects are translated within the MIKE Workbench.
| Object in MODFLOW | Workbench Model Object Type | Model Object Info |
|---|---|---|
| N/A | MODFLOW | |
| Cell | Element | |
| Well | Well | |
| Cln Well | Multilayer well |
Geo Location¶
To be able to draw elements on the map, the MODFLOW model must have gsf definition before model registration.
Model registration¶
The MODFLOW model should be registered from the Scenario Explorer of MIKE Workbench.
The below screens show how the registration could look like.
When registering a model, a new entry for the MODFLOW model will appear.
When selecting model type MODFLOW USG, the Model register wizard will display a dialog where the necessary MODFLOW model information can be specified.
Model registration wizard (Page 1) - MODFLOW model Information
On the first page of the model registration wizard, the master MODFLOW file, start time and executable are selected. The gsf file is optional. Once it is selected, the coordinate system, x offset, y offset and rotation need to be defined.
| Field | Description |
|---|---|
| Model name | Name of the model when it has been registered in MIKE Workbench. |
| MODFLOW file | The MODFLOW nam file. |
| MODFLOW GSF file | The MODFLOW gsf file. |
| Coordinate system | The coordinate system of the gsf file. |
| X offset | The x offset of the gsf file. |
| Y offset | The y offset of the gsf file. |
| Rotate | The rotation of the gsf file. |
| Start time | The reference time of the model. |
| USG exe file | The executable application of the model. |
Click Next to continue.
Parsing the model could take a few minutes for large models.
Review the parsed model and click Prepare for Registration.
Click Finish to accept the parsed model.
The model parsing is now complete.
The model wizard now allows you to change the model setup name and projection used.
Click Next.
Specify the scenario name and configure the scenario using one of the following options:
- Do Not Create a Scenario
No scenario will be created. Note that scenarios can be created at a later stage. - Create Defualt Scenario
A default (empty) scenario will be created. - Configure new Scenario
Creates a new scenario using the model registration wizard. - Use Template Scenario
Creates a new scenario based on an existing scenario.
After registration, the MODFLOW model can be opened from the Scenario Explorer.