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FM Tutorial M01 QGIS GPKG WLL Lines: Difference between revisions

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Water Level Line (WLL) are used to display 1D results in map outputs. WLL do not change 1D hydraulic computations and are only used to display 1D results in plan (2D) formats. For more information on WLL, refer to the <u>[https://docs.tuflow.com/classic-hpc/manual/2025.2/Map-2.html#OneDMap-3 TUFLOW Manual]</u>:
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<li>Open the '''Water_Level_Lines.shp''' layer from the '''Module_Data\Module_01\gis''' folder.</li>
 
<li> Open the project GeoPackage file <b>M02_5m_002.gpkg</b> in the Browser Panel. Drag and drop the layer <b>FloodModeller_Nodes_P'''Water_Level_Lines.shp</b>''' into the project GeoPackage file <b>M02_5m_002.gpkg</b>. Re-name the layer <b>1d_x1d_WLL_FMT_M01_001_L.gpkg</b>. The _x1d_ in the name flags that the Water Level Lines will be linked to an external 1D network, in this case a Flood Modeller network, rather than a 1D ESTRY network. </li>
 
Save as '''1d_x1d_WLL_FMT_M01_001_L.shp''' within the FMT_M01\TUFLOW\model\gis folder. The _x1d_ in the name flags that the Water Level Lines will be linked to an external 1D network, in this case a Flood Modeller network, rather than a 1D ESTRY network.</li>
 
<li>The 1d_wll layer must be digitised perpendicular to the flow direction and from left to right looking downstream. An attribute of '2.5' is specified for all lines as a minimum distance interval along the WLL to generate triangulation points.</li>
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