1D Urban Inflow
  • 03 Aug 2022
  • 2 Minutes to read
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1D Urban Inflow

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Your urban network will require details of flow entering the system.

Water entering the manholes (Junction nodes) of our urban network can be directly defined inflow, allowing us to utilise data copied from elsewhere (excel, for example). It is possible to store data for multiple flow timeseries and select between these with ease.

Flood Modeller provides functionality to quickly and easily Define direct inflow for your Junction nodes.

Alternatively, or additionally, your urban network may consist of Rain Gage and Subcatchment nodes providing inflow to the system.

The Rain Gage node provides the rain data entering the Subcatchment node. In the latter, descriptors such as width, area and details of imperviousness are specified. Infiltration parameters are defined, and the option is provided to route the calculated runoff through other subcatchments before reaching the urban system.

Additionally, you can Draw a new subcatchment directly onto the map, and the area of the Subcatchment node can be automatically calculated based on this drawn polygon, if you desire.

Alongside options to Delete a subcatchment node, and Move subcatchment icons, functionality is also provided to Edit a subcatchment perimeter. Parameters for each subcatchment such as infiltration data are all provided when Working with subcatchment nodes.

Functionality is provided to Add a rain gage node to your urban network. Options are also provided to Move a rain gage and Delete rain gage nodes. The rainfall itself is specified within the unit when Working with rain gage nodes.

In additional to editing urban Rain Gage and Subcatchment components individually, the urban Multi Edit & View tool is designed to easily Visualise urban networks and Edit multiple components of urban networks.

A final option for the inflow entering your urban network is for this to be provided from a 1D river network and/or 2D components. We refer the reader to the Integrated Modelling section for further details.

Once you have defined inflow entering your urban network, you are ready to set up the associated 1D urban simulation.

More on 1D urban modelling

To set up Urban Simulations, details of timing and run-type must be provided alongside other simulation options. Climatology inputs can also be specified. Urban simulations can be run individually, or in batches.

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.

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