View source for TUFLOW CATCH Tutorial M02 GIS Inputs QGIS

<font color="red"><font size=18>Page Under Construction</font></font>
== Introduction == 
An interventions (2d_im) layer is created to remove pollutants from the run off around the paddocks and within the waterway. <br>

== Create Interventions == 
An interventions (2d_im) layer contains one or more lines, called devices. In the TUFLOW CATCH Control file, mass removal properties are assigned to these devices. TUFLOW CATCH will write an interventions summary that describes the total flows, masses entering and masses removed for all intervention devices and pollutants. <br>

Create the 2d_im 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: Click ..., and navigate to the '''TUFLOW_CATCH_Module_02\Modelling''' folder.
:* Empty Type: Click ..., and tick on '2d_im' from the empty type list.
:* Geometry Type: Click ..., and tick on 'Line'.
:* Run ID: '''TC02_001'''
<li> Click 'Run'. Once the tool has finished, click 'Close'. The '''2d_im_TC02_001_L''' will appear in the QGIS Layers panel. <br>
<br>
[[File: image of dialog]]<br>
<br>
</ol>

To help determine where the intervention devices should be placed, load in the following files:
*'''2d_mat_TC01_001_R.shp''' from the '''TUFLOW\model\gis''' folder
*'''TC01_001_catchment_hydraulic_d_Max.tif''' from the '''TUFLOW_CATCH_Module_01\Modelling\TUFLOWCATCH\results\grids''' folder

Create interventions:
<ol>
<li>In the QGIS Layers panel, select (left click) '''2d_im_TC02_001_L''' and toggle on editing. 
<li>Select 'Add Line Feature'.
<li>Digitise a line around the corner of the paddock with material ID 9 (paddockD). Use the right mouse button to terminate the line, and an attributes dialog will appear. Set the ID to 'trench1' and click 'OK'.
<li>Repeat the same process as above to digitise a line between the road and the paddock with material ID 7 (paddockB). Set the ID to 'retentionBasin'.
<br>
{{Video|name=}}<br>
<li>Zoom in to the downstream end of the model. Use the '''TC01_001_catchment_hydraulic_d_Max.tif''' to determine where the water will be flowing. Using the same process as above, digitise a line perpendicular to the water on the western side of the stream. Set the ID to 'bufferStrip1'.
<br>
{{Video|name=}}<br>
<li>Create two more intervention devices with ID's 'trench2' and 'bufferStrip2'. Use the image below as a guide.<br>
<br>
[[File: image of devices with labels turned on]]<br>
<br>
<li>Once all the devices have been created, turn off editing to save the edits. 
</ol>

<br>
{{Tips Navigation
|uplink=[[TUFLOW_CATCH_Tutorial_M02#GIS_Inputs| Back to TUFLOW CATCH Tutorial 2]]
}}