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FM Tute M02 QGIS Boundary Conditions: Difference between revisions

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Created page with "<ol> =Introduction= This page details the method for using QGIS to create the GIS based boundary layer. The layer will be populated with the name of each inflow boundary which..."
 
 
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<ol>
=Introduction=
This page details the method for using QGIS to create the GIS based boundary layer. The layer will be populated with the name of each inflow boundary which will be linked to the boundary database (created in [[Module1_test#Define_Boundary_Conditions|Module 1]]) in the following steps of this module. The created boundary will be applied as a source-area boundary in a 2d_sa layer. <br>
=Method=
<li>Copy the layer '''2d_sa_FMT_M02_001_R.shp''' within the '''Module_data\Module_02\Inflow folder''' folder into the '''TUFLOW\model\gis''' folder.
<li>Open the layer in QGIS. Four polygons have been digitised over the location of the proposed development. Each polygon represents a sub-catchment to which different inflow boundaries will be associated. Populate the first and only attribute of each polygon with the name of the inflow boundary as shown in the figure below. The next steps of this module will link these boundary names with an inflow using the bc_dbase located in '''TUFLOW\bc_dbase''' . <br>
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<li>Save the bc_dbase as '''bc_dbase_FMT_M02.csv'''. It is now ready to be used within the model.
 
==Conclusion==
A GIS layer has been created containing four polygons in a 2d_sa layer over the location of the proposed development. The existing boundary conditions database (bc_dbase) has been modified to link these four GIS objects to hydrographs within an external csv file. Please return to the main page of the [[Flood_Modeller_Tutorial_Module02| Flood Modeller module 2 tutorial]].
 
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