Tutorial M07 GIS Inputs QGIS GPKG

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_07 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.
   
   
   
   
4. Set the QGIS workspace projection to EPSG:32760, see Set the Projection.

Method

Setup the GeoPackage Database:

1. Navigate to the Module_07\TUFLOW\model\gis folder. Save a copy of M02_001.gpkg as M07_001.gpkg.
2. Within the QGIS Browser Panel, right click on 'Favorites' and select 'Add a Directory...'.
3. Navigate to the Module_07 folder and select it.

Open the 2d_code_M01_001_R file, either:

• Within the QGIS Browser Panel, navigate to M07_001.gpkg and double click the layer, or
• In File Explorer, drag and drop the M07_001.gpkg into the QGIS workspace and select the layer.
• Use the 'Apply TUFLOW Styles to Open Layers'.

Create quadtree nesting layer:

1. Click on the ‘Import Empty File’ symbol from the TUFLOW plugin toolbar.
2. Select '2d_qnl' from the Empty Type list.
3. In the Run ID box write 'M07_001'.
4. Tick the 'Regions' Geometry Type.
5. In the Spatial Database Options, select 'All to one'. Navigate to the Module_07/TUFLOW/model/gis folder and select M07_001.gpkg. Click Save and hit 'OK'.
6. The 2d_qnl (quadtree nesting layer) appears in the QGIS Layers Panel.
7. Right click on the 2d_qnl_M07_001_R and toggle on Editing.
8. Select 'Add Polygon Feature' and digitise a polygon around the creek.
9. Terminate the polygon by right clicking and write '2' into the 'Nest_Level' attribute.
10. Turn off editing to save the edits.
    
    
    
    

Conclusion

• A 2d_qnl layer was digitised surrounding the creek.

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