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TUFLOW SWMM Tutorial M01 Check QGIS: Difference between revisions

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<li>Open '''TUFLOW\check\TS01_5m_001_Check.gpkg'''. When prompted, open layers '''TS01_5m_001_grd_check_R''' and '''TS01_5m_001_1d_to_2d_check_R'''
<li>Use the 'Apply TUFLOW Styles to Open Layers'.
<li>The '''grd_check''' is the 2D grid defined by the 2d_code layer and contains a region object for each cell. It is useful to understand how the model is orientated, the cell size in relation to the hydraulic features and where certain calculations occur in the model. In this tutorial, the grid is orientated to align with the downstream road.▼
<li>Use the 'Apply GPKG Layer Names'.
<li>The '''1d_to_2d_check_R''' file shows the cells selected by the SX boundary links (that connect the 1D SWMM objects to 2D TUFLOW). It is recommended thata the 2D cell width (i.e. cell side legth x number of cell) be equal or greater than the width of the 1D culvert. Zoom to each structure to inspect the SX links. In all cases the 2D linkage is 10m wide. Is this equal or more than the width of the associated 1D culvert:
▲<li>The grd_check is the 2D grid defined by the 2d_code layer and contains a region object for each cell. It is useful to understand how the model is orientated, the cell size in relation to the hydraulic features and where certain calculations occur in the model. In this tutorial, the grid is orientated to align with the downstream road.
<li>The '''nwk_C_check_L''' file shows all attributes applied to the network elements. Some fields should be inspected as they have changes from the input '''1d_nwk_M03_culverts''' layer:
:*Len_or_ANA: contains the length used by TUFLOW (determined by the digitised line).
:*pSlope: the slope of the 1D element.<br>
 
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<font color="red">'''<< Add video >>'''</font>
 
<li>The '''1d_to_2d_check_R''' file shows the cells selected by the SX boundary links. It is recommended the same number of linking cells is selected at both the upstream and downstream of the culverts and that the number of selected cells is proportional to the structure size. Zoom to each structure to inspect the SX links:
:*The point SX selects a single cell in which the point falls. <br>
:*The region SX selects all cells where the cell centers fall within the region.
:*The line SX selects cells which are intercepted by the line using the crosshair approach. For example, the dashed lines below are the hidden crosshairs within a cell. An SX line must intersect at least one of these crosshairs to be selected:<br>
<ol>
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[[File:Cross-hair approach.png | 300px]]</ol>
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<font color="red">'''<< Add video >>'''</font>
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