Working with Junction nodes

Multiple outflow pipes from a junction are allowed if using Dynamic Wave routing.

If using Steady or Kinematic Wave routing, only a single outflow pipe (link) is allowed from a Junction node (a Flow-Divider node may be suitable if two outflow pipes are required).

The Junction node Properties Window is shown below.

Click in the Name field, type a new name and press the Enter key on your keyboard to adjust the label provided to your junction. This is populated by default based on values set on the Model Defaults window, recall how to edit these defaults from the Urban Networks section. Note that if you change the name of a node, this label will be automatically updated in any connecting links so there is no further work to be done.

The X-coordinate and Y-coordinate are automatically filled based on the node location in the map view.

A Description and/or Tag can be optional provided. You may find tags helpful to group components together - this can be a way to categorise specific nodes. To edit these, click in relevant the field, type a new value, and press the Enter key.

External Inflows can be defined and allowed to enter Junction nodes. Please refer to the Urban Inflow page for further details.

Addition of pollutants to specify Treatment is not currently available within the software, although pre-defined pollutants will be unaffected.

The general node parameters can all be edited by clicking in relevant the field, typing a new value, and pressing the Enter key. The Invert Elevation and Maximum Depth of the Junction node are populated by default based on values set on the Model Defaults window, recall how to edit these defaults from the Urban Networks section. The Initial Depth and Surcharge Depth will both be zero by default.

The Ponded Area can also be set in the model defaults. If non-zero, this allows water that leaves the Junction node to be stored so that it can subsequently return to the urban network. This parameter needs to relate to your grid size if Integrating urban networks with 2D components.