Tuflow

Flood Modeller Tutorial Module02 Provisional: Difference between revisions

Browse history interactively
← Older editNewer edit →
Content deleted Content added
VisualWikitext
Line 14:
The steps required to modify each of the GIS inputs are demonstrated in QGIS using SHP and GPKG formats. Instructions for completing the module in ArcGIS or MapInfo are available on the archive page for [[Flood_Modeller_Tutorial_Module02_Archive |Tutorial Module 02]].
===Define Elevations (Building a TIN)===
We have provided theThe GIS layers necessaryrequired to modify the ground elevations to representfor the proposed development are provided. This part of the tutorialmodule will demonstratedemonstrates how a TIN is created from these GIS layers. We will also update theThe GIS defining the road crest level is also updated.
 
Follow the instructions below for the preferred GIS format.
Line 22:
 
===Define Surface Roughness===
We have provided theThe GIS layers necessaryrequired to modify the land use areas thataffected will change as part ofby the proposed development are provided. This part of the tutorial willmodule requirerequires populating the layer attributes to assign Manning’s n roughness values to each land use.
 
Follow the instructions below for the preferred GIS format.
Line 29:
 
===Define Pipe Network===
This part of the module creates the GIS layers that make up the definition ofdefine the sub-surfacesubsurface pipe network. The inlets/ and pits of the pipe network will beare linked to the 2D domain. WeA willpit alsoinlet createdatabase theis pitalso inletcreated database whichto linkslink thosethese GIS layers to depth-discharge curves.
 
Follow the instructions below for the preferred GIS format.
Line 36:
 
===Define Boundary Conditions===
This part of the module demonstrates how an inflow can be applied directly to the pits of the pipe network. A GIS layer of the inflow boundary has beenis provided. We will also modify theThe existing Boundary Conditions Database is also modified to include these new inflows.
 
Follow the instructions below for the preferred GIS format.
Line 68:
 
There have been two changes to the model that impact the TGC file:
*WeTwo havelayers are created two layers that togetherto form a 3D TIN representing changes to the ground elevations.
*WeTwo have2d_mat createdlayers twoare 2d_matcreated layers thatto represent changes to the land use at the location of the proposed development.
<ol>
<li>Begin by opening <b>FMT_M01_001.tgc</b> in the text editor. Save the file as <b>FMT_M02_001.tgc</b>.
<li> Open <b>FMT_M02_001.tgc</b>.
<li>We will now add the commands to modify the topography to represent the proposed development. Add the following commands after the READ GIS Z Shape line:<br><u>'''QGIS - SHP'''</u><br><font color="blue"><tt>Create TIN Zpts WRITE TIN </tt></font><font color="red"><tt>==</tt></font> gis\2d_ztin_FMT_M02_development_001_R.shp | gis\2d_ztin_ FMT_M02_development_001_P.SHPshp<br> ▼
<br>
<li>We will now add the commands to modify the topography to represent the proposed development. Add the following commands after the READ GIS Z Shape line:</li>
<br><u>'''QGIS - SHP'''</u><br>
▲<br><font color="blue"><tt>Create TIN Zpts WRITE TIN </tt></font><font color="red"><tt>==</tt></font> gis\2d_ztin_FMT_M02_development_001_R.shp | gis\2d_ztin_ FMT_M02_development_001_P.SHP<br>
<br><u>'''QGIS - GPKG'''</u><br>
<br><font color="blue"><tt>Create TIN Zpts WRITE TIN </tt></font><font color="red"><tt>==</tt></font> 2d_ztin_FMT_M02_development_001_R | 2d_ztin_ FMT_M02_development_001_P<br>
Line 84 ⟶ 81:
<br>Our intention for the 2d_mat layers created in this module is for them to build upon the existing commands which modify roughness. We would like for the new layers to overwrite the existing layers at the location of the proposed development. This process of layering and building up the model is a powerful tool in TUFLOW that minimises data duplication and provides a means of quality control. We need to ensure that the commands reading in our new 2d_mat layers are read in after the existing commands. <br>
 
<br><u>'''QGIS - SHP'''</u><br></li>
:<font color="blue"><tt>Read GIS Mat</tt></font><font color="red"><tt>==</tt></font> gis\2d_mat_FMT_M02_DEV_001_R.SHP
:<font color="blue"><tt>Read GIS Mat</tt></font><font color="red"><tt>==</tt></font> gis\2d_mat_FMT_M02_DEV_Buildings_001_R.SHP
Retrieved from "https://wiki.tuflow.com/Flood_Modeller_Tutorial_Module02_Provisional"