Run a 2D model

To run a 2D model in Flood Modeller, follow these steps:

  1. The guide uses example data that is packaged with Flood Modeller. To access the data, go to the Start tab and select the menu option (on the left-hand side) to “Extract example data”. Then specify the location you want to unpack these data to. Note you can unpack the example data multiple times to different specified locations (e.g. if you want to refresh the example files after using/editing them).
  2. Start Flood Modeller and load in the GIS datasets required to define your 2D model. The procedure is:
  3. Start a new 2D simulation by clicking on the 'New 2D Simulation' button in the 'Simulation' tab of the main ribbon. You will be prompted to specify a name and location for saving your simulation file (for example,. '…\Getting Started\2D Model\2d model'). A 2D simulation run definition window will then appear.

    On the General tab set the finish time to 10 (hours). Leave all other settings at their defaults.

  4. On 'Domains' tab, select the 'Domain Details' sub-tab and make the following entries:

  5. On the 'Boundary Conditions' sub-tab make the following entries:

  6. Time (hours)

    Flow (m3/s)







    The new rows will be added automatically as you populate the table. .

    The time-series data entered will also be plotted automatically in the chart adjacent to the table.

  7. All 2D model settings are now defined. Click the 'Run' button in the 2D interface to start your simulation (click ‘yes’ to save changes, if asked).

    A new window is displayed showing the progress of your simulation and summarising the calculations performed.

    The example simulation should take approximately 2 minutes to complete (times will vary due to different computer specifications). At the end of the simulation, close the run progress window (press the 'Enter' key) and also close the 2D simulation window to return to the main Flood Modeller interface.

  8. Load and view 2D model results. Your 2D simulation file will be referenced in the Simulations section of the Project panel. It should have a solid blue triangle next to the filename to signify that associated model results are now available.

    Right-click on your 2D model file and select View Result from the displayed options. This will automatically locate the master file for your 2D results (sup file or xmdf.sup file). You will be prompted (in a new window) to select which output parameters to load – just click 'OK' to proceed.

    The time-series data associated with your simulation will be loaded to your map view and will appear as a new group in the 'Layers' panel. The maximum flood extent time-step (signified as 9999) will be selected and displayed automatically. You can choose any other time step from the simulation by clicking the 'Timestep' tab below the right-hand panel and selecting from the displayed list (note that time-steps are only displayed here when an appropriate 2D results file is highlighted in the 'Layers' panel).

    The 2D results data consists of a combination of scalar and vector datasets. Flood Modeller can only display one scalar dataset (depth or water level) and/or one vector dataset (velocity or flow) at any one time. If you switch on a different scalar/vector dataset within the same results file, then the current one will be automatically turned off first.

  9. Animate 2D results. Highlight the depth parameter layer in the 'Layers' panel. Select the 'Results' tab in the main toolbar and click the 'Single Result' button (in the 'Animations' section). The animation toolbar will be displayed at the top of the map view, as shown below:

    Click the play button, , and the active 2D results data (those ticked in the 'Layers' panel to make them visible on the map) will be animated. The animation will start at time-step 0 and continue until the last real time-step is reached (the maximum extent time-steps are ignored). A progress bar on the map shows the currently displayed time.

    To exit the animation mode click the “X” button on the right of the animation toolbar.