Difference between revisions of "QGIS SWMM Outfalls Fix Multiply Connected Links"

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<ol>
 
<li>'''GeoPackage in TUFLOW-SWMM Format:''' The input GeoPackage file to be updated.
 
<li>'''GeoPackage in TUFLOW-SWMM Format:''' The input GeoPackage file to be updated.
<li>'''Channel extension length:''' '''<font color=red>???</font>'''
+
<li>'''Channel extension length:''' As the name suggests.
<li>'''Channel extension width:''' '''<font color=red>???</font>'''
+
<li>'''Channel extension width:''' As the name suggests.
<li>'''Channel extension maximum depth:''' '''<font color=red>???</font>'''
+
<li>'''Channel extension maximum depth:''' As the name suggests.
<li>'''Channel extension z-offset for new downstream outlet elevation:''' '''<font color=red>???</font>'''
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<li>'''Channel extension z-offset for new downstream outlet elevation:''' The difference between the elevation of the upstream node and downstream node (the outlet). This difference is used to determine the elevation of the new downstream outlet.
<li>'''Channel extension roughness coefficient:''' '''<font color=red>???</font>'''
+
<li>'''Channel extension roughness coefficient:''' The Manning's n value for the channel extension.
 
<li>'''GeoPackage output filename:''' Determines the location and filename of the output GeoPackage.
 
<li>'''GeoPackage output filename:''' Determines the location and filename of the output GeoPackage.
 
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Revision as of 13:24, 19 December 2023

Introduction

This tool creates a conduit extension to eliminate 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 Convert - ESTRY layers to SWMM 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.

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 Panel, navigate to 'Processing' in the menubar and select 'Toolbox'.

Open processing toolbox.png

Parameters

  1. GeoPackage in TUFLOW-SWMM Format: The input GeoPackage file to be updated.
  2. Channel extension length: As the name suggests.
  3. Channel extension width: As the name suggests.
  4. Channel extension maximum depth: As the name suggests.
  5. Channel extension z-offset for new downstream outlet elevation: The difference between the elevation of the upstream node and downstream node (the outlet). This difference is used to determine the elevation of the new downstream outlet.
  6. Channel extension roughness coefficient: The Manning's n value for the channel extension.
  7. GeoPackage output filename: Determines the location and filename of the output GeoPackage.


Multiply connected links dialog 2.png

Example


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