Nodes represent places where actions or measurements occur in a river system, where water can be added, extracted, stored, recorded, or change ownership in a model. A node can be used to represent things that actually happen over a large physical area but that, for modelling purposes, occur at a single point. In sub-catchments, they provide a position in the catchment network where water management information can be placed. In Source, nodes are depicted using the icons shown in Figure 1.

Note: This section describes how nodes can be configured in Source. For the scientific background behind their operation, refer to the Source Scientific Reference Guide.

Figure 1. Source node icons

Bulk Licensing	Confluence	Controlled splitter	Environmental demand	Gauge	Gauge - unaccounted difference


Inflow	Inflow -unaccounted difference	Loss	Maximum Order Constraint	Minimum Flow Requirement	Off Allocation

Parallel Arcs	Scenario Transfer	Storage	Storage – unaccounted difference	Weir	Weir – unaccounted difference

Supply Point	Supply Point - groundwater extraction	Transfer Ownership	Water User	Water User – IQQM Crop Demand Model	Water User – Irrigator Demand Model

Water User – Monthly Pattern Demand Model	Water User – Pride Demand Model	Water User – Time Series Demand Model

Using nodes in Source

This section outlines how to work with nodes in Source. Some actions can be duplicated for links.

Adding nodes in a model

To add a node to a model, either:

Drag the appropriate type of node from the Node Palette and drop it onto the Schematic Editor; or
Right-click on the Schematic Editor and choose the appropriate node from the Add menu.

Note: Once added to a scenario, nodes can be viewed and their parameters edited using Feature Table.

Node and link default names

Whenever a node or link is created, it is given a default name in the pattern:

type #

where "type" is the type of node or link and "#" is a number which increases monotonically during the life of the schematic.

Note: The view of this name can be toggled using the Schematic Editor options toolbar.

Node connections

Nodes can be joined to each other according to the matrix in Figure 2. Links between nodes will vary depending on the nodes being connected. For example, a wetland conveyance link will occur when a storage node is linked to a wetland connector.

Figure 2. Node connection matrix

Renaming nodes and links

Changing the name of a node or link only alters it in the scenario that you changed it in. A change in one scenario does not propagate to others; they are not linked in any way. You can change the name of a node or link using one of the following methods:

To make the Project Explorer visible, choose View » Project Explorer or click its equivalent on the toolbar. In the Project Hierarchy, click the node or link to select it, pause, and click a second time. The name will be prepared for editing (Figure 3). Type the new name and press return; or
Right-click the node or link in the schematic and choose Rename. The name will be prepared for editing. Type the new name in the field, then press Enter.

Figure 3. Renaming a node or link

Note: Source does not support duplicate names for nodes or links and will warn you if there is one. You must ensure that the names you choose are unique to the scenario.

Configuring node and link parameters

Use the feature editor of a node/link to configure its parameters, as well as edit them. Refer to About feature editors.

Note: In a catchments scenario, all nodes are, by default, confluence nodes, so every node ever created will be, at least, a confluence.

Searching for nodes and links

The Find panel allows you to search for specific nodes and links within open scenarios. Press Ctrl+F to open the Find panel (Figure 4) and enter any part of the element's name as a search term. The result set indicates the scenario containing the node/link along with its type. This is useful when you are working with very large scenarios.

Figure 4. Find panel

Copying and pasting

You can copy and paste a desired selection of nodes and/or links within the same scenario only. Select the desired nodes and/or links, right click and choose Copy. To paste the selection, right click on the Schematic Editor and choose Paste. Note that all attributes of a node are copied (provided any associated links are selected as well - for example, confluence and water user nodes). Also, refer to Copying network elements for more information.

Deleting nodes and links

Deleting nodes can be achieved simply by selecting the node and pressing the delete key, or by right-clicking it and choosing Delete from the contextual menu. Deleting a link removes only the link. Deleting a node removes both the node and any links that were attached to the node.

Note: Deleting a node will cause loss of any data associated with that node, as well as any links connecting to or from it. A delete operation cannot be undone. You must recreate the link or node.

Adding notes to nodes and links

You can add a text-based message or note to a node or link. Refer to About notes for more information on notes.

Note: You can only add a note for a link that has been configured for storage routing.

To add (or edit) a note:

Open the feature editor;
Right click on the icon (of the node or link); and
Choose Add Note (or Edit Note) from the contextual menu.

Figure 5 shows how to follow this procedure for an inflow node.

Figure 5. Inflow node, adding/editing a note

Working with nodes

Individual nodes can be rotated, once they are present in the Schematic editor. First, select the node. Then, click on the green dot and rotate the node to your desired position.

Contents

About Nodes