Tutorial M04 002 GIS Inputs QGIS GPKG draft

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Introduction

QGIS is used to create, import and view input data.

TUFLOW Project Re-Configuration

Re-configure the TUFLOW project to use and save empty files to the correct folder:

  1. Go to Plugins > TUFLOW > Editing > Configure / Create TUFLOW Project.
  2. Change the folder which contains TUFLOW to the Module_04 folder. This is the only change required, the model folder structure and template empty files are supplied from previous model.
    Note: The 'results' and 'check' folder get automatically created when the TUFLOW model is run.
  3. Click 'OK' and save the QGIS workspace by selecting Project > Save As.

    M04 GPKG ConfigureProject.PNG

  4. Set the QGIS workspace projection to EPSG:32760, see Set the Projection.


Method

Set up the GeoPackage Database:

  1. Navigate to the Module_04\TUFLOW\model\gis folder. Save a copy of M02_001.gpkg as M04_002.gpkg.
  2. Within the QGIS Browser Panel, right click on 'Favorites' and select 'Add a Directory...'.
  3. Navigate to the Module_04 folder and select it.

Within the QGIS Browser Panel, navigate to the Module_04\Tutorial_Data folder. Drag and drop the following layers into the M04_002.gpkg:

  • 2d_bg_M04_002_L
  • 2d_po_M04_001_L
  • 2d_po_M04_001_P
  • 2d_zsh_M02_cut_002_R

Investigate the supplied files:

  1. Open the files, either:
    • Within the QGIS Browser Panel, navigate to M04_002.gpkg and double click the layers, or
    • In File Explorer, drag and drop the M04_002.gpkg into the QGIS workspace and select the layers (hold Ctrl to select multiple).
  2. Use the ‘Apply TUFLOW Styles to Open Layers’.
  3. The 2d_zsh file cuts through the road embankment, see Module 2 for more information.
  4. The 2d_bg represents the bridge in 2D, it has layers of varying blockage and form loss for the “pier layer” and the “super structure layer”, which consists of the “deck layer” and the “rail layer”.
    Refer to the TUFLOW Manual for more information on the attributes of the 2d_bg layer.



  5. The 2d_po files include a structure group output for the 2D bridge. The 'Label' attribute links the 2d_po line to the 2d_po points by the same attribute ‘Bridge’.
  6. The 2d_po line is snapped to the 2d_lfcsh from left to right looking downstream and has the following attributes:
    • Type = QS (structure flow)
    • Label = Bridge
  7. The 2d_po points are digitised upstream and downstream of the 2d_lfcsh and have the following attributes:
    • Type = HU (water level upstream) and HD (water level downstream)
    • Label = Bridge



Conclusion

  • The 2d_lfcsh layer was supplied for use as a 2D bridge.
  • The 2d_po structure group layers were added to output additional hydraulic information of the 2D bridge.


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