Junctions are points in the network where links join together and where water enters or leaves the network.
The basic input data required for junctions are:
- elevation
- water demand
- initial water quality.
The output results computed for junctions are:
- hydraulic head
- pressure
- water quality.
- have multiple categories of demands assigned to them
- have negative demands indicating that water is entering the network
- be water quality sources where constituents enter the network
- contain emitters (or sprinklers) which make the outflow rate depend on the pressure
| Field | Description |
| Id | A unique label used to identify the junction. |
| X-Coordinate | Horizontal location of the junction on the Study Area Map. If left blank then the junction will not appear on the map. |
| Y-Coordinate | Vertical location of the junction on the Study Area Map. If left blank then the junction will not appear on the map. |
| Description | An optional text string that describes other significant information about the junction. |
| Elevation | The elevation in feet(meters) above some common reference of the junction. This is a required property. Elevation is used only to compute pressure at the junction. It does not affect any other computed quantity. |
| Demand Pattern | The ID label of the time pattern used to characterize time variation in demand for the main category of consumer at the junction. The pattern provides multipliers that are applied to the Base Demand to determine actual demand in a given time period. If left blank then the Default Time Pattern assigned in the Hydraulic Options will be used. |
| Demand Categories | When the ellipsis button is clicked a Demand Category Editor is displayed that allows base demands and time patterns to be assigned to other categories of users at the junction. |
| Emitter Coefficient | Discharge coefficient for emitter (sprinkler or nozzle) placed at junction. Units are flow units at 1 unit of pressure drop (psi or m). Leave blank or set to 0 if no emitter is present. See Emitters for more details. |
| Initial Quality | Water quality level at the junction at the start of the simulation. Can be left blank if no water quality analysis is being made or if the level is zero. |
| Source Quality | When the ellipsis button is clicked a Source Quality Editor appears in which the quality of any water entering the network at this location can be specified. |