TUFLOW CATCH Tutorial M01 GIS Inputs QGIS: Difference between revisions
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== Introduction ==
The required materials (2d_mat) and culvert layers are supplied and inspected. The culvert layers are supplied from <u>[[Tutorial_M03 | TUFLOW Tutorial Module 3]]</u>. A receiving polygon is created to track the pollutant mass fluxes at the downstream end of the model.<br>
== Review Supplied Input Files ==
A number of model input files have been provided in the '''TUFLOW_CATCH_Module_01\Tutorial_Data''' folder. Copy the following GIS files into the '''Modelling\TUFLOW\model\gis''' folder:
:*'''2d_mat_TC01_001_R'''
:*'''2d_bc_M03_culverts_001_P'''
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<ol>
<li>In Windows File Explorer, navigate to the '''Modelling\TUFLOW\model\gis''' folder. Drag and drop the above layers into QGIS.
<li> Click on the 'Apply TUFLOW Styles to Open Layers' symbol from the TUFLOW Plugin toolbar.▼
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<li>The '''2d_mat_TC01_001_R''' layer contains the spatial definition of material types:
:* It is a supplementary material file to '''2d_mat_M01_001_R''', which is used in the TUFLOW tutorials. For more information, refer to <u>[[Tutorial_M01_Materials_QGIS | TUFLOW Tutorial Module 1]]</u>.
:* An aerial photo of the model area was used as a guide to create the regions in this materials file. This image is supplied in the '''TUFLOW_CATCH_Tutorial_Models\Aerial_Photo''' folder.<br>
:* The material file is supplied with a QGIS style file (.qml) and displays the different material groups based on the Material ID. ▼
:* Material ID 5 represents brush, while Material IDs 6, 7, 8 and 9 represent pasture and correspond to paddocks A, B, C and D respectively. These materials are discussed in further detail later in this tutorial.
▲:* The material file is supplied with a QGIS style file (.qml)
<br>
{{Video|name=animation_TC1_GIS_inputs_01b.mp4|width=1236}}<br>
<li>The other supplied layers represent culverts. For more information, refer to <u>[[Tutorial_M03#GIS_Inputs | TUFLOW Tutorial Module 3]]</u>.<br>
▲
<br>
{{Video|name=animation_TC1_GIS_inputs_02b.mp4|width=1236}}<br>
</ol>
== Create Receiving Polygon ==
A receiving polygon (2d_rp) is a single polygon that covers the downstream receiving waters. The TUFLOW HPC cells within the polygon will be excluded from the TUFLOW HPC simulation. TUFLOW CATCH generates summary time series files that report the total water and pollutant mass fluxes entering the polygon. <br>
As this polygon covers the entire downstream receiving waters, no downstream 2d_bc boundary layer is required. No upstream boundary is required either, as TUFLOW CATCH is designed for whole of catchment analysis so independent hydrologic inflows are not necessary. Due to this, the '''2d_bc_M01_001_L''' will be removed from the TUFLOW Boundary Control file later in this tutorial. <br>
Create the receiving polygon (2d_rp) layer using the TUFLOW CATCH plugin:
<ol>
<li>Go to Processing > Toolbox from the top dropdown menu options to open the Processing Toolbox.
<li> Go to TUFLOW Catch in the processing tool list and select 'Import Empty'. This opens the dialog shown below.
:* Project Directory: This should automatically be set to the '''TUFLOW_CATCH_Module_01\Modelling''' folder.
:* Empty Type: Click ..., and tick on '2d_rp' from the empty type list.
:* Geometry Type: Click ..., and tick on 'Region'.
:* Run ID: '''TC01_001'''
<li> Click 'Run'. Once the tool has finished, click 'Close'. The '''2d_rp_TC01_001_R''' will appear in the QGIS Layers panel. <br>
▲<br>
{{Video|name=animation_TC1_GIS_inputs_03b.mp4|width=1236}}<br>
<li>To guide the placement of the receiving polygon, it is recommended to load '''2d_code_M01_001_R.shp''' from the '''TUFLOW\model\gis''' folder into QGIS.
<li>In the QGIS Layers panel, select (left click) '''2d_rp_TC01_001_R''' and toggle on editing.
<li>Select 'Add Polygon Feature'.
<li>Digitise a polygon similar to below. Use the '''2d_code_M01_001_R''' as a guide to ensure it covers the entire downstream receiving waters. The polygon should encompass a portion of the downstream boundary of the '''2d_code_M01_001_R''' to ensure all receiving waters are included. In this case, the polygon should include the four most downstream vertices of the '''2d_code_M01_001_R'''. Use the right mouse button to terminate the polygon and an attributes dialog will appear. Click 'OK' with no attribute information input.
<li>Turn off editing to save the edits. <br>
▲<br>
{{Video|name=animation_TC1_GIS_inputs_04b.mp4|width=1236}}<br>
</ol>
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{{Tips Navigation
|uplink=[[TUFLOW_CATCH_Tutorial_M01#GIS_Inputs| Back to TUFLOW CATCH Tutorial 01]]
}}
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