Linking 1D Urban Networks and 2D Components

You can integrate an urban network and 2D components to allow (for example) the outflow from a pipe to flow onto the floodplain.

The urban network should be fully defined beforehand, and the simulation must be set to use the Dynamic Wave routing model and have the Variable Time Step setting deactivated.

Note: You may also find smaller timesteps assist with stability when integrating this with your 2D components.

To integrate an urban network and 2D components, you must first create the so-called "link-elements" to indicate which nodes are connected, and how the flow is transferred at each. You can Select the link-elements to use from 2 available types. Usually the flow-type link will be used as the weir-type link is for more advanced users only.

Flood Modeller provides a specific tool to help with creating your link-elements. You can Use the link-element generator to create these elements in polygon, line, or point format.

After defining the link-elements, you need to Configure the 2D simulation window to setup an integrated 2D simulation. This needs to specify your link-element file, alongside your urban network and 2D components.

Ensure you save your simulation to keep any changes. Your integrated simulation is now ready to run. This is run in exactly the same way as when you Run a 2D simulation.

If you encounter issues with your integrated simulation, exploring the Diagnostics and Tips will help identify problems and resolve warnings and errors.

Alongside the multiple options provided for viewing 1D and 2D results, Integrated Modelling Results include the data passed across the linked aspects as an additional output.