Integrated Modelling

This section of the manual is all about integrated modelling.

An integrated simulation involves 1D river, 1D urban, and/or 2D modelling components. Each of the modelling components involved should be fully defined and run (without errors) independently prior to integrating the components. In particular, the river and/or urban networks must be complete, and the associated 1D simulations must run without instabilities.

You can integrate River Networks and 2D Components to allow (for example) water overtopping a riverbank to flow onto the floodplain. To integrate a river network and 2D components, you must first create the so-called "link-lines" to indicate which nodes are connected, and how the flow is transferred at each. The 'River 1D / 2D Link Line Generator' tool can be used to draw these link-lines directly onto the map view. After defining the link-lines, an integrated 2D simulation can be set up. The 2D simulation window needs to be configured to specify your link-lines file, alongside your river network and 2D components.

Integration of River and Urban Networks allows (for example) the outflow from a pipe to enter a river. To integrate a river network and urban network, you must initially set up the so-called “link-references” to indicate which nodes are connected, and how the flow is transferred at each. The ‘1D Urban / 1D River Linking Definition' tool is provided to assist with this. After defining the link-references, an integrated 1D simulation can be set up. The 1D simulation window needs to be configured to specify your link-reference file, alongside your river network and urban network.

You can also integrate Urban Networks and 2D Components to allow (for example) the outflow from a pipe to flow onto the floodplain. 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. The '1D Urban / 2D Linking' tool is provided to create these elements in polygon, line, or point format. After defining the link-elements, an integrated 2D simulation can be set up. This needs to specify your link-element file, alongside your urban network and 2D components.

The integration of components is not exclusive - you can connect 2D components to both river and urban networks in a single simulation, and these networks can also be connected!

You may also be interested in Linking to Third-Party Software such as TUFLOW or ESTRY, and Flood Modeller provides a host of tools to assist with this.