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QGIS SWMM Outfalls Fix Multiply Connected Links: Difference between revisions

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== Introduction ==
This tool creates a conduit extension to eliminateresolve the SWMM error with multiple links connected to the same outfall node. This is, a common issue when converting ESTRY models for use in TUFLOW-SWMM (see the <u>[[QGIS SWMM Convert ESTRY Layers To SWMM|Convert - ESTRY layers to SWMM]]</u> processing tool). This tool takes an existing GeoPackage file and creates a new GeoPackage file that contains the channel extensions. The newly created extension channel is always an open rectangular channel with the provided attributes. The generated channels may need to be modified to match the real world geometry at the location.
 
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For each multiply connected outfall, this tool generates a new conduit channel and a corresponding junction node. The new junction node is positioned where the initial outfall node was multiply connected. The new conduit channel is then connected to this junction node, and the outfall node is relocated to the outlet of the new channel. The elevation of the outfall node is adjusted according to the input parameters. The newly created extension channel is always an open rectangular channel with the provided attributes.<br>
This tool takes the existing GeoPackage file (with the multiply connected links) and creates a duplicate. The new GeoPackage is then updated with the channel extension(s).
 
'''Note:''' The generated channels may need to be modified to match the real world geometry at the location.
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== Usage ==
This tool, '''Outfalls - Fix Multiply Connected Links''', can be found in the QGIS processing toolbox panel under 'TUFLOW >> SWMM'. To open the Processing Toolbox Panelpanel, navigate to 'Processing' in the menubar and select 'Toolbox'.<br>
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[[File:open_processing_toolbox.png]]<br>
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=== Parameters ===
<ol>
<li>'''GeoPackage in TUFLOW-SWMM Format:''' The input GeoPackage file towith bemultiply updatedconnected links.
<li>'''Channel extension length:''' The '''<fontlength color=red>???</font>'''of the new conduit channel(s). Minimum value is 0.001.
<li>'''Channel extension width:''' '''<fontThe color=red>???</font>'''width of the new conduit channel(s). Minimum value is 0.001.
<li>'''channelChannel extension maximum depth:''' '''<fontThe color=red>???</font>'''depth of the new conduit channel(s). Minimum value is 0.001.
<li>'''Channel extension z-offset for new downstream outlet elevation:''' '''<fontThe difference between the elevation of the upstream node and downstream node. This difference is used to determine the elevation of the new downstream outlet. color=red>???</font>'''
<li>'''Channel extension roughness coefficient:''' '''<fontThe color=red>???</font>''Manning's n value for the new conduit channel(s).
<li>'''GeoPackage output filename:''' Determines the location and filename of the output GeoPackage.
</ol>
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[[File:multiply_connected_links_dialog_2Outfalls_Fix_Multiply_Connected_Links_Dialog_a.png]]
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=== Example ===
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{{Video|name=.mp4|width=1235}}
{{Video|name=Animation_Outfalls_Fix_Multiply_Connected_Links_01a.mp4|width=1235}}
 
 
 
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