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FM Tutorial M02 QGIS SHP Boundary Conditions: Difference between revisions

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=Method=
<u>'''Boundary Condition Database'''</u>
<li>Copy the file '''100yr2hr_loc.csv''' from '''Module_data\Module_02\Inflow''' and place it into the '''TUFLOW\model\bc_dbase''' folder. This file contains the four hydrographs that will be used.
<li>Open up the latest version of the boundary condition database. This is located within the '''TUFLOW\model\bc_dbase folder''' and is called '''bc_dbase_FMT_M01.csv'''.
<li>We need to add four additional rows to the file which reference four additional inflows. The revised bc_dbase should look like the figure below:<br>
<br>
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<li>Copy the layer '''2d_sa_FMT_M02_001_R.shp''' within the '''Module_data\Module_02\Inflow''' 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.
<li>Turn on Toggle Editing mode. Populate the first and only attribute of each polygon with the name of the inflow boundary .as Thein nextthe stepsimage ofbelow. thisThese moduleboundary names will linkbe theselinked boundaryto namesthose withspecified anin the steps inflowabove using the bc_dbase located in '''TUFLOW\bc_dbase''' . <br>
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[[File:M07 SA polygons QGIS.png|700px]]
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=Conclusion=
<br>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_Provisional#Flood Modeller 1D/ESTRY 1D Link | Flood Modeller Tutorial 2]].
 
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