FM Tutorial M02 QGIS SHP Define Roughness - Revision history

RussellGardner: /* Conclusions */

2025-10-07T14:17:58Z

Conclusions

← Older revision		Revision as of 00:17, 8 October 2025
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	<br>		<br>
	Two 2d_mat GIS layers have been created to define land use categories representing the proposed development.		Two 2d_mat GIS layers have been created to define land use categories representing the proposed development.

	<br>
	{{Tips Navigation		<br>{{Tips Navigation
	\|uplink=[[Flood_Modeller_Tutorial_Module02_Provisional#Define Pipe Network\| Back to Tutorial Module 02 Main Page]]		\|uplink=[[Flood_Modeller_Tutorial_Module02_Provisional#Define Pipe Network\| Back to Tutorial Module 02 Main Page]]
	}}		}}

RussellGardner at 14:17, 7 October 2025

2025-10-07T14:17:49Z

← Older revision		Revision as of 00:17, 8 October 2025
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	=Conclusions=		=Conclusions=
			<br>

	Two 2d_mat GIS layers have been created to define land use categories representing the proposed development.		Two 2d_mat GIS layers have been created to define land use categories representing the proposed development.
			<br>

	{{Tips Navigation		{{Tips Navigation
	\|uplink=[[Flood_Modeller_Tutorial_Module02_Provisional#Define Pipe Network\| Back to Tutorial Module 02 Main Page]]		\|uplink=[[Flood_Modeller_Tutorial_Module02_Provisional#Define Pipe Network\| Back to Tutorial Module 02 Main Page]]

RussellGardner: /* Conclusions */

2025-10-07T14:17:35Z

Conclusions

← Older revision		Revision as of 00:17, 8 October 2025
Line 17:		Line 17:
	=Conclusions=		=Conclusions=

	Two 2d_mat GIS layers have been created to define land use categories representing the proposed development. ~~Please return to the main page of the [[Flood_Modeller_Tutorial_Module02_Provisional#Define Pipe Network\|Flood Modeller Module 2 Tutorial]]~~		Two 2d_mat GIS layers have been created to define land use categories representing the proposed development.

	{{Tips Navigation		{{Tips Navigation
	\|uplink=[[Flood_Modeller_Tutorial_Module02_Provisional\| Back to Tutorial Module 02 Main Page]]		\|uplink=[[Flood_Modeller_Tutorial_Module02_Provisional#Define Pipe Network\| Back to Tutorial Module 02 Main Page]]
	}}		}}

Tuflowduncan: /* Conclusions */

2025-09-25T18:01:13Z

Conclusions

← Older revision		Revision as of 04:01, 26 September 2025
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	Two 2d_mat GIS layers have been created to define land use categories representing the proposed development. Please return to the main page of the [[Flood_Modeller_Tutorial_Module02_Provisional#Define Pipe Network\|Flood Modeller Module 2 Tutorial]]		Two 2d_mat GIS layers have been created to define land use categories representing the proposed development. Please return to the main page of the [[Flood_Modeller_Tutorial_Module02_Provisional#Define Pipe Network\|Flood Modeller Module 2 Tutorial]]

			{{Tips Navigation
			\|uplink=[[Flood_Modeller_Tutorial_Module02_Provisional\| Back to Tutorial Module 02 Main Page]]
			}}

RussellGardner: Created page with "=Introduction= This page describes the method for creating the GIS based material types (land use areas) for the proposed development. Once these layers have been setup, surf..."

2025-07-02T14:35:56Z

Created page with "=Introduction= This page describes the method for creating the GIS based material types (land use areas) for the proposed development. Once these layers have been setup, surf..."

New page

=Introduction=

This page describes the method for creating the GIS based material types (land use areas) for the proposed development. Once these layers have been setup, surface roughness or bed-resistance values (e.g. Manning’s n) are assigned to each of these land use areas via the materials.csv file present in the model folder.

=Method=
<ol>
<li>Copy the contents of the FMT_tutorial\Module_data\Module_02\Materials into the TUFLOW\model\gis folder. This folder contains the following two layers:
*2d_mat_FMT_M02_DEV_001_R.shp, and
*2d_mat_FMT_M02_DEV_Buildings_001_R.shp .
<li>Open both layers within QGIS. The 2d_mat_FMT_M02_DEV_001_R.shp layer contains polygons defining grassed areas and roads within the proposed development. The 2d_mat_FMT_M02_DEV_Buildings_001_R.shp layer contains polygons defining the buildings within the proposed development.
<li>The materials attribute for a number of polygons representing proposed roads in the 2d_mat_FMT_M02_DEV_001_R.shp layer have not been assigned and will need to be populated. Assign a Material ID of 2 to these polygons as shown in the figure below. Leave the remaining larger polygon with a Material ID of 1. 
<li>All polygons within the 2d_mat_FMT_M02_DEV_Buildings_001_R.shp layer represent the buildings of the proposed development and will have the same Material ID of 3. Make use of the ‘Update All’ feature to automatically assign this value to all objects at the same time. Toggle Editing for the '''2d_mat_FMT_M02_DEV_Buildings_001_R''' layer then right-click and select ''Open Attribute Table''. Type '3' in the blank field and select ''Update All'' as shown in the figure below. 
<li>Open the Materials.csv file within the TUFLOW\model\ folder to observe the Manning’s n values that will be assigned to each Material ID.</ol>

 {{Video|name= Define Surface Roughness Module 02 QGIS SHP.mp4 |width=1123}} 

=Conclusions=

Two 2d_mat GIS layers have been created to define land use categories representing the proposed development. Please return to the main page of the [[Flood_Modeller_Tutorial_Module02_Provisional#Define Pipe Network|Flood Modeller Module 2 Tutorial]]