QGIS SWMM BC Create Channel Endpoint 1D/2D Connections

Introduction

This tool creates 1D/2D connections at the endpoints of SWMM channels. HX connections are created on the upstream end, and SX connections are created on the downstream end.

Note: The positions of the HX and SX connections may not be completely accurate, so it is recommended for the user to check the output.

Usage

This tool, BC - Create channel endpoint 1D/2D connections, 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. Input Conduits Layer: The conduits layer to which the 1D/2D connections will be made.
2. Selected features only: If channel(s) in the conduits layer have been selected using the 'Select Features' tool, this option will become available. If checked on, the tool will only create 1D/2D connections for the selected channel(s).
3. Create connections at: Specifies whether the 1D/2D connections are made at the 'Upstream end', 'Downstream end', or 'Both ends' of the channel(s) in the conduits layer.
4. Offset distance: Distance from the channel endpoint to the midpoint of the BC line.
5. Length of BC lines: Length of BC lines.
6. Set 2D cell elevation to 1D culvert invert at 1D/2D connection cells if needed: If checked on, SX and HX boundaries will have the 'Flags' attribute set to 'Z'. This ensures that valid elevations occur at the 1D/2D interface. HX boundaries require 2D cell elevations at or above the 1D elevation, while SX boundaries require 2D cell elevations at or below the 1D elevation.
7. Output Layer: Determines the location and filename of the output file. It is recommended to name the output layer with the prefix 2d_bc so TUFLOW styles can be automatically applied.

Example

Using the 'Selected Features Only':

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