The Geographic Editor shows a geographic representation of the catchment model, and displays the sub-catchment map and the node-link network of the current scenario.
Figure 1. Geographic Editor contextual menu
Several commands are available when you right-click in the Geographic Editor (Figure 1):
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- To add a new node, right-click on the Geographic Editor and enable Add Nodes in the contextual menu. Then click on the Geographic Editor at the desired location of the new node (top right schematic in Figure 2). By default, all nodes are created as confluence nodes. Subsequent clicks in the Geographic Editor will place additional new nodes. Note that Add Nodes stays enabled until it is explicitly disabled by enabling a different mode (eg. Pan or Select) from the contextual menu .
To change the node type, enable Select from the contextual menu. Click on the node of interest, which will highlight it. Right-click and choose Change Node Model. This will open another menu, which lists the node types you can change to. Select the desired node type (bottom left schematic in Figure 2). With Select enabled, you can also edit nodes and links through their respective feature editors.Anchor ChangeNodeModel ChangeNodeModel - Links can be added by enabling Add Link from the contextual menu. First, click on the upstream node (highlighted with an enlarged icon), then click on the downstream node; this will create a link. Refer to the bottom right schematic in Figure 112. Since Add Link remains enabled, subsequent pairs of clicks continue to add additional links until it is disabled. By default, a new link is configured with straight through routing. The routing type can be changed by right-clicking on the link and choosing Change Link Routing.
- Nodes and links can be deleted after Select has been enabled from the contextual menu. Click on the node or link you wish to delete (this will highlight it) and press the delete key or right-click and select Delete from the contextual menu.
Spatial coordinates and elevations for nodes and reaches can be set using Location Control.
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| When deleting nodes and links, there is no warning given, and no confirmation is sought. When a node is deleted, all links immediately upstream or downstream of the node are deleted as well. This action cannot be undone |
Figure 2. Geographic editor (Network editing)
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| Note: Sub-catchment runoff is fed into links, so deleting the receiving link, that is, the link associated with the sub-catchment, effectively stops that catchment runoff from entering the system. When this happens, the sub-catchment boundary is highlighted in red to indicate that it is disconnected from the network. |
To reconnect a disconnected sub-catchment to the network:
- Create a new node (if necessary) and add a link to act as the receiving link for the sub-catchment;
- Choose Select from the contextual menu and click the catchment you wish to reconnect;
- Right-click and choose Attach Link (this will contain a sub-menu listing links that do not have a sub-catchment inflow); and
- Select the desired link to attach the sub-catchment to the link.
Geolocation coordinates and elevations for nodes and reaches can be set using Location Control.
Since version 4.2.0 of Source a visual distinction is made between the links which are connected to a sub-catchment and hence receive lateral flow, and those which are not. Lateral flow receiving links are shaded dark blue and links that are not receiving lateral flow are shaded light blue. This is illustrated in Figure 3.
Figure 3 Distinction between lateral flow receiving and non-receiving links
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Note that deactivating a sub-catchment is equivalent to deactivating its receiving link, and vice versa. Therefore, a deactivated link in a catchment scenario is shown by the associated sub-catchment having a grey border in Geographic Editor, while in Schematic Editor, the deactivated link will show as a solid grey line. It is possible to have links in a catchment scenario that are not receiving runoff from a sub-catchment. For example, if you have inserted a node using Insert Node Model, only one of the two links is a recieving link. If you deactivate a non-receiving link, it will be shown as a solid grey line in the Schematic Editor, but its deactivation is not indicated in the Geographic Editor.
Figure 2 4 shows an example of component deactivation in a catchment scenario, with an inserted gauge that has a downstream receiving link. The scenario is shown in Geographic Editor (top row) and Schematic Editor (bottom row) when the Gauge node alone was deactivated using Deactivate (left pane), or the Gauge and all upstream components were deactivated using Multi-deactivate » This and all upstream, or the gauge and all downstream components were deactivated using Multi-deactivate » This and all downstream including tributaries (right pane).
For more information about component deactivation, see Schematic Editor - Deactivating Nodes and Links.
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4. Node, link and sub-catchment deactivation in a catchment scenario