FM Tutorial M01 QGIS GPKG 1D2D Code - Revision history

RussellGardner: /* Method */

2025-10-07T11:09:10Z

Method

← Older revision		Revision as of 21:09, 7 October 2025
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			<br>

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

	{{Tips Navigation		{{Tips Navigation
	\|uplink=[[Flood_Modeller_Tutorial_Module01_Provisional#Modify Simulation Control Files\| Back to Tutorial Module 01 Main Page]]		\|uplink=[[Flood_Modeller_Tutorial_Module01_Provisional#Modify Simulation Control Files\| Back to Tutorial Module 01 Main Page]]

RussellGardner: /* Method */

2025-10-07T11:04:45Z

Method

← Older revision		Revision as of 21:04, 7 October 2025
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	=Method=		=Method=
	<li>Import in an empty <b>2d_bc_empty_R.gpkg</b> layer from ~~within~~ the '''FMT_tutorial\FMT_M01\TUFLOW\model\gis\empty''' folder.</li>		<li>Import an empty <b>2d_bc_empty_R.gpkg</b> layer from the '''FMT_tutorial\FMT_M01\TUFLOW\model\gis\empty''' folder into the project GeoPackage file <b>M02_5m_002.gpkg</b>. Rename the layer as <b>2d_bc_FMT_M01_HX_001_R</b>. </li>
	<li>~~Save~~ the ~~layer as~~ <b>~~2d_bc_FMT_M01_HX_001_R~~.~~gpkg~~</b> in the '''~~FMT_tutorial~~\~~FMT_M01\TUFLOW\model~~\gis''' folder. </li>		<li>Open the <b>Inactive_area.shp</b> GIS layer from the '''Module_Data\Module_01\gis''' folder. Select all objects from within this layer, copy and paste into <b>2d_bc_FMT_M01_HX_001_R</b>. </li>
	<li>Move the empty 2d_bc layer <b>2d_bc_FMT_M01_HX_001_R.gpkg</b> into the project GeoPackage file <b>M02_5m_002.gpkg</b> in the Browser Panel. Load the empty layer <b>2d_bc_FMT_M01_HX_001_R</b> into QGIS from <b>M02_5m_002.gpkg</b>.</li>
	<li>Open the <b>Inactive_area.shp</b> GIS layer from '''Module_Data\Module_01\shp''' folder. Select all objects from within this layer, copy and paste into <b>2d_bc_FMT_M01_HX_001_R</b>. </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 '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.		<li> For all polygons assign a 'f' attribute of '-1'. A cell code of '-1' deactivates all cells within the digitised code polygons.

RussellGardner at 09:47, 7 October 2025

2025-10-07T09:47:04Z

← Older revision		Revision as of 19:47, 7 October 2025
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	<li>Save the file</li>		<li>Save the file</li>

	<br>Please return to the [[Flood_Modeller_Tutorial_Module01_Provisional#Modify_Simulation_Control_Files\|Flood Modeller Tutorial Model]]</br>.
	{{Tips Navigation		{{Tips Navigation
	\|uplink=[[Flood_Modeller_Tutorial_Module01_Provisional#Modify Simulation Control Files\| Back to Tutorial Module 01 Main Page]]		\|uplink=[[Flood_Modeller_Tutorial_Module01_Provisional#Modify Simulation Control Files\| Back to Tutorial Module 01 Main Page]]

RussellGardner at 09:46, 7 October 2025

2025-10-07T09:46:24Z

← Older revision		Revision as of 19:46, 7 October 2025
Line 24:		Line 24:
	<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		{{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>

Tuflowduncan: /* Method */

2025-09-25T18:03:33Z

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..."

2025-06-27T12:49:04Z

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.gpkg 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.gpkg in the '''FMT_tutorial\FMT_M01\TUFLOW\model\gis''' folder. </li>
<li>Move the empty 2d_bc layer 2d_bc_FMT_M01_HX_001_R.gpkg into the project GeoPackage file M02_5m_002.gpkg in the Browser Panel. Load the empty layer 2d_bc_FMT_M01_HX_001_R into QGIS from M02_5m_002.gpkg.</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. </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 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''' 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 GPKG.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 GPKG 1D2D Code - Revision history

RussellGardner: /* Method */

RussellGardner: /* Method */

RussellGardner at 09:47, 7 October 2025

RussellGardner at 09:46, 7 October 2025

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..."