Junctions are non-storage nodes where water can leave the network to satisfy consumer demands or enter the network as an inflow. Junctions are also where chemical constituents can enter the network. Pipes are link elements that connect junction nodes, pumps, valves, tanks, and reservoirs. Each pipe element must terminate in two end node elements.

Assigning Demands to a Junction

Junctions can have an unlimited number of demands associated with them. Demands are assigned to junctions using the Demands table to define Demand Collections. Demand Collections consists of a Base Flow and a Demand Pattern. If the demand doesn’t vary over time, the Pattern is set to Fixed.

To Assign a Demand to a Junction

1. Select the Junction in the Drawing View.
2. In the Properties window, click the ellipsis (...) button in the Demand Collection field under the Demands heading.
3. In the Demands dialog that opens, enter the base demand in the Flow column.
4. Click the arrow button to assign a previously created Pattern, click the ellipsis button to create a new Pattern in the Patterns dialog, or leave the value at Fixed (Fixed means the demand doesn’t vary over time).

Applying a Zone to a Junction

You can group elements together by any desired criteria through the use of zones. A Zone can contain any number of elements and can include a combination of any or all element types. For more information on zones and their use, see Zones.

To Apply a Previously Created Zone to a Junction

1. Select the junction in the Drawing View.
2. In the Properties window, click the menu in the Zone field and select the zone you want.