FM Tutorial M01 QGIS SHP 1D2D Code - Revision history

RussellGardner at 13:42, 3 October 2025

2025-10-03T13:42:22Z

← Older revision		Revision as of 23:42, 3 October 2025
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	{{Tips Navigation		{{Tips Navigation
	\|uplink=[[Flood_Modeller_Tutorial_Module01_Provisional\| Back to Tutorial Module 01 Main Page]]		\|uplink=[[Flood_Modeller_Tutorial_Module01_Provisional#Modify Simulation Control Files\| Back to Tutorial Module 01 Main Page]]
	}}		}}
	</ol>		</ol>

RussellGardner: /* Method */

2025-10-03T13:41:37Z

Method

← Older revision		Revision as of 23:41, 3 October 2025
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	<br>		<br>

	<\br>

	{{Tips Navigation		{{Tips Navigation

RussellGardner: /* Method */

2025-10-03T13:41:17Z

Method

← Older revision		Revision as of 23:41, 3 October 2025
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	<li> Observe how the code polygon has been digitised downstream of node FC01.11. In this case, no code polygon has been digitised over the embankment. This is because overtopping of the embankment will be modelled in the 2D TUFLOW component of the model. The '''2d_bc_FMT_M01_HX_001_L.shp''' layer created previously contains additional HX boundary polylines at the upstream and downstream faces of the embankment to allow for overtopping.</li>		<li> Observe how the code polygon has been digitised downstream of node FC01.11. In this case, no code polygon has been digitised over the embankment. This is because overtopping of the embankment will be modelled in the 2D TUFLOW component of the model. The '''2d_bc_FMT_M01_HX_001_L.shp''' layer created previously contains additional HX boundary polylines at the upstream and downstream faces of the embankment to allow for overtopping.</li>

	<br>{{Video\|name= Deactivate 2D Cells SHP v2 .mp4 \|width=1123}}<br>		<br>{{Video\|name= Deactivate 2D Cells SHP v2.mp4 \|width=1123}}<br>

	<li>Save the file</li>		<li>Save the file</li>

			<br>
	<br>Please return to the [[Flood_Modeller_Tutorial_Module01_Provisional#Modify_Simulation_Control_Files\|Flood Modeller Tutorial Model]]</br>.

			<\br>

	{{Tips Navigation		{{Tips Navigation

RussellGardner: /* Method */

2025-10-03T13:32:47Z

Method

← Older revision		Revision as of 23:32, 3 October 2025
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	<li> Observe how the code polygon has been digitised downstream of node FC01.11. In this case, no code polygon has been digitised over the embankment. This is because overtopping of the embankment will be modelled in the 2D TUFLOW component of the model. The '''2d_bc_FMT_M01_HX_001_L.shp''' layer created previously contains additional HX boundary polylines at the upstream and downstream faces of the embankment to allow for overtopping.</li>		<li> Observe how the code polygon has been digitised downstream of node FC01.11. In this case, no code polygon has been digitised over the embankment. This is because overtopping of the embankment will be modelled in the 2D TUFLOW component of the model. The '''2d_bc_FMT_M01_HX_001_L.shp''' layer created previously contains additional HX boundary polylines at the upstream and downstream faces of the embankment to allow for overtopping.</li>

	<br>{{Video\|name=Deactivate 2D Cells SHP v2 .mp4 \|width=1123}}<br>		<br>{{Video\|name= Deactivate 2D Cells SHP v2 .mp4 \|width=1123}}<br>

	<li>Save the file</li>		<li>Save the file</li>

RussellGardner: /* Method */

2025-10-03T13:32:35Z

Method

← Older revision		Revision as of 23:32, 3 October 2025
Line 15:		Line 15:
	<li> Observe how the code polygon has been digitised downstream of node FC01.11. In this case, no code polygon has been digitised over the embankment. This is because overtopping of the embankment will be modelled in the 2D TUFLOW component of the model. The '''2d_bc_FMT_M01_HX_001_L.shp''' layer created previously contains additional HX boundary polylines at the upstream and downstream faces of the embankment to allow for overtopping.</li>		<li> Observe how the code polygon has been digitised downstream of node FC01.11. In this case, no code polygon has been digitised over the embankment. This is because overtopping of the embankment will be modelled in the 2D TUFLOW component of the model. The '''2d_bc_FMT_M01_HX_001_L.shp''' layer created previously contains additional HX boundary polylines at the upstream and downstream faces of the embankment to allow for overtopping.</li>

	<br>{{Video\|name= \|width=1123}}<br>		<br>{{Video\|name=Deactivate 2D Cells SHP v2 .mp4 \|width=1123}}<br>

	<li>Save the file</li>		<li>Save the file</li>

RussellGardner: /* Method */

2025-10-03T13:09:39Z

Method

← Older revision		Revision as of 23:09, 3 October 2025
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	<li> Observe how the code polygon has been digitised downstream of node FC01.11. In this case, no code polygon has been digitised over the embankment. This is because overtopping of the embankment will be modelled in the 2D TUFLOW component of the model. The '''2d_bc_FMT_M01_HX_001_L.shp''' layer created previously contains additional HX boundary polylines at the upstream and downstream faces of the embankment to allow for overtopping.</li>		<li> Observe how the code polygon has been digitised downstream of node FC01.11. In this case, no code polygon has been digitised over the embankment. This is because overtopping of the embankment will be modelled in the 2D TUFLOW component of the model. The '''2d_bc_FMT_M01_HX_001_L.shp''' layer created previously contains additional HX boundary polylines at the upstream and downstream faces of the embankment to allow for overtopping.</li>

	<br>{{Video\|name= ~~Deactivate 2D cells SHP.mp4~~ \|width=1123}}<br>		<br>{{Video\|name= \|width=1123}}<br>

	<li>Save the file</li>		<li>Save the file</li>

Tuflowduncan: /* Method */

2025-09-25T18:03:22Z

Method

← Older revision		Revision as of 04:03, 26 September 2025
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	<br>Please return to the [[Flood_Modeller_Tutorial_Module01_Provisional#Modify_Simulation_Control_Files\|Flood Modeller Tutorial Model]]</br>.		<br>Please return to the [[Flood_Modeller_Tutorial_Module01_Provisional#Modify_Simulation_Control_Files\|Flood Modeller Tutorial Model]]</br>.

			{{Tips Navigation
			\|uplink=[[Flood_Modeller_Tutorial_Module01_Provisional\| Back to Tutorial Module 01 Main Page]]
			}}
	</ol>		</ol>

RussellGardner: Created page with "
=Introduction= In this section we will deactivate the 2D cells where the 1D Flood Modeller component is replacing the 2D representation of the open channel. The width of..."

2025-06-27T12:48:58Z

Created page with "<ol> =Introduction= In this section we will deactivate the 2D cells where the 1D Flood Modeller component is replacing the 2D representation of the open channel. The width of..."

New page

<ol>
=Introduction=
In this section we will deactivate the 2D cells where the 1D Flood Modeller component is replacing the 2D representation of the open channel. The width of the deactivated 2D area should be approximately equal to the width of the 1D cross-sections. This step essentially replaces the conveyance of the deactivated 2D area with an equivalent 1D conveyance.

=Method=
<li>Import in an empty 2d_bc_empty_R.shp layer from within the '''FMT_tutorial\FMT_M01\TUFLOW\model\gis\empty''' folder.</li>
<li>Save the layer as 2d_bc_FMT_M01_HX_001_R.shp in the '''FMT_tutorial\FMT_M01\TUFLOW\model\gis''' folder. </li>
<li>Open the Inactive_area.shp GIS layer from '''Module_Data\Module_01\shp''' folder. Select all objects from within this layer, copy and paste into 2d_bc_FMT_M01_HX_001_R.shp. </li>
<li> For all polygons assign a 'type' attribute of 'CD'. This designates the digitised polygon as a code polygon where the 2D cells within it may be either active or inactive. </li>
<li> For all polygons assign a 'f' attribute of '-1'. A cell code of '-1' deactivates all cells within the digitised code polygons.
Cells may also be deactivated within a model by using a cell code of '0' instead of '-1'. A value of 0 removes these cells from the computation entirely which has the benefit of reducing computation time and output file sizes.</li>

<li> Observe how the code polygon has not been digitised between nodes FC01.35 and FC01.34. The polygon covers the area between these two Flood Modeller nodes. This is because overtopping of the embankment at this location has been represented in the 1D Flood Modeller component of the model.</li>

<li> Observe how the code polygon has been digitised downstream of node FC01.11. In this case, no code polygon has been digitised over the embankment. This is because overtopping of the embankment will be modelled in the 2D TUFLOW component of the model. The '''2d_bc_FMT_M01_HX_001_L.shp''' layer created previously contains additional HX boundary polylines at the upstream and downstream faces of the embankment to allow for overtopping.</li>

 {{Video|name= Deactivate 2D cells SHP.mp4 |width=1123}} 

<li>Save the file</li>

 Please return to the [[Flood_Modeller_Tutorial_Module01_Provisional#Modify_Simulation_Control_Files|Flood Modeller Tutorial Model]].

</ol>

FM Tutorial M01 QGIS SHP 1D2D Code - Revision history

RussellGardner at 13:42, 3 October 2025

RussellGardner: /* Method */

RussellGardner: /* Method */

RussellGardner: /* Method */

RussellGardner: /* Method */

RussellGardner: /* Method */

Tuflowduncan: /* Method */

RussellGardner: Created page with " =Introduction= In this section we will deactivate the 2D cells where the 1D Flood Modeller component is replacing the 2D representation of the open channel. The width of..."

RussellGardner: Created page with "
=Introduction= In this section we will deactivate the 2D cells where the 1D Flood Modeller component is replacing the 2D representation of the open channel. The width of..."