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FM Tute M01 MI 1D2D Links: Difference between revisions

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<li>Import in an empty <b>2d_bc_empty.TAB</b> layer from within the '''FMT_tutorial\FMT_M01\TUFLOW\model\mi\empty''' folder. </li>
<li>Save the layer as <b>2d_bc_FMT_M01_HX_001_L.TAB</b> in the '''FMT_tutorial\FMT_M01\TUFLOW\model\mi''' folder. </li>
<li>Open the <b>1D_2D_HX_Links1D_2D_HX_Links_L.TAB</b> GIS layer from '''Module_Data\Module_01\mi''' folder. Select all objects from within this layer, copy and paste into <b>2d_bc_FMT_M01_HX_001_L.TAB</b>.</li>
<li>Interrogate one of the lines running along the banks of the watercourse. These lines are the 1D/2D boundary links and have been assigned a type ‘HX’.</li>
<li>Interrogate one of the lines connecting the x1D node to the HX line. These are the connection or ‘CN’ lines that read the water level from Flood Modeller and transfers this to the HX line. </li>
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Note that where there are junctions within the Flood Modeller 1D model (i.e. at structures), both the nodes immediately upstream and downstream must be connected to TUFLOW. Refer to the below figure where the junctions are circled in redblue and the upstream and downstream RIVER units are circled in greenyellow. The HX lines must be broken between the junctions as this is a requirement of a linked Flood Modeller – TUFLOW model. <br>
In the example below, the HX lines are broken between FC01.35 and FC01.34 as a culvert is located between these nodes.
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<li>The CN and HX lines between nodes FC02.06 and FC02.01d along the tributary have not been digitised. Digitise these lines to connect the nodes to the 2D domain.<br>
To digitise the CN lines, make the <b> 2d_bc_FMT_M01_HX_0012d_bc_FMT_M01_HX_001_L.TAB </b> layer editable and ensure snapping is turned on. For each node in the '''1d_x1d_FMT_M01_nodes_0011d_x1d_FMT_M01_nodes_001_P.TAB''' layer, draw a line from the node to the HX line. The line must snap to both the node and the HX line. Draw two lines for each node, one to the left bank and one to the right bank. In the 'Type' attribute of each line, type 'CN'. Assign the digitised CN lines an ‘f' attribute’ of ‘1’. This sets the weighting to be applied in distributing the water level from the 1D node to the 2D cell. <br>
<br>The figure below shows how the nodes are connected at the confluence. Note that all Flood Modeller nodes at the junction are present within the 1d_x1D_nodes layer, and are connected to the 2D domain. The HX lines are broken around the junction. </li>
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