QGIS SWMM Outfalls Fix Multiply Connected Links

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'.

Parameters

1. GeoPackage in TUFLOW-SWMM Format: The input GeoPackage file to be updated.
2. Channel extension length:
3. Channel extension width:
4. channel extension maximum depth:
5. Channel extension z-offset for new downstream outlet elevation:
6. Channel extension roughness coefficient:
7. GeoPackage output filename:

Example

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