1D Urban Simulations

To set up 1D urban simulations, a network must be loaded. Recall from the Urban Network section, this file also contains details about the associated simulation. Unlike 1D river modelling, you do not create new urban simulations independently of networks - you can run the simulation associated to the urban network, or create a new urban network for a new simulation.

Details for your simulation must be provided in the Model Settings. After you Access the model settings, you can easily access of all settings and parameters via various tabs.

Flood Modeller provides the option to Configure the general tab which is where the simulation type is selected, i.e. Which routing model to select for use in your simulation. The option to Allow Ponding is also set here; allowing water leaving the system via manholes to pond and subsequently re-enter.

Details of simulation start/end times alongside the Timestep must be specified. These should always be reviewed prior to running simulations. You must Configure the dates tab to specify simulation start and end times, and all timestep details are provided when you Configure the timesteps tab.

Flood Modeller provides the option to Configure the dynamic wave tab - this contains details of the certain calculation options being performed within the solver.

Climatology inputs can also be specified for your 1D urban models via the Climatology editor window.

A 1D urban simulation can be Run individually, or multiple simulations can be set to Run in batch.

If you are solely interested in running a 1D urban simulation and don’t want to load the entire urban network into the map view, you can Load the simulation independently to decrease loading times.

More on 1D urban modelling

If you encounter issues with urban modelling, exploring the Urban Diagnostics will help identify problems and resolve warnings and errors.

Multiple options are provided for viewing Urban Results, including plots with animation functionality to show water level changing over time. Each chart can be fully formatted to customise as needed, alongside providing various methods for exporting the data for post-processing or use in reports.

You may also be interested in linking your 1D urban network to a 1D river network or to 2D components. Details of this can be found in the Integrated Modelling section of this manual.