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- Vertical - used to connect most nodes. The first four types of links in Table 1 are all vertical; or
- Horizontal (or wetland linksLink) - used to connect the Wetlands Hydraulic Connector node (source) and the Storage node (target) only. The presence of a horizontal link at a storage node indicates that the storage is behaving as a wetland. Figure 2 shows an example of a horizontal link.
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| Type of link | Used to connect | Representation in Schematic Editor | Example |
|---|---|---|---|
| Demand link | Supply point (source) and water user (target) nodes only | Red, dashed line | |
| Lagged flow routing | Various nodes | Black line, with alternating dots and dashes | |
| Storage routing | Various nodes | Black, solid line | |
| Straight through routing | Various nodes | Black, dashed line | |
| Wetland link (Horizontal) | Wetlands Hydraulic Connector node (source) and the Storage node (target) only | Green, solid line | Shown in Figure 2 |
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For horizontal links, the node connectors appear on the left and right side, instead of above and below the nodes. Click and drag these connectors together as described above.
Figure 2. Horizontal link
You You can also drag the link vertically once it has been created by clicking on the red dot. This appears in the centre of the link when you click on the link. For more detail on the wetland link, refer to Wetland Link.
Figure 2. Horizontal link
Dragging links
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All links are assigned straight through routing by default . This link has and have the following features:
- Water enters and exits such a link in the same time-step;
- There are no configuration parameters associated with straight through routing links; and
- You cannot configure fluxes, constituents or ownership.
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- .
Lagged flow routing
Lagged flow routing only considers the average travel time of water in a river reach. It does not consider flow attenuation. The flow entering a link exits that link at some whole number of time-steps in the future. This type of link is represented in the Schematic Editor as a black line, with alternating dots and dashes. Once you have enabled lagged flow routing, double click the link to configure the settings.
Figure 1 shows the feature editor for a lagged flow routing link and Table 1 describes the associated parameters required to configure this link.
Figure 1. Link (Lagged flow routing)
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| Parameter | Type | Definition |
|---|---|---|
| Lag time | Time | This represents the time it takes for water to travel along the link and is a positive real number. |
| Initial Storage | Volume | The amount of water deemed to be in the link on the first time-step. For example, if there is a lag of two days, and there is 10ML in the link at the start of the run, then 5ML is deemed to be flowing out each day (total initial storage divided by lag). |
Storage flow routing
This type of link is represented in the Schematic Editor as a solid black line. Storage routing is based on mass conservation and the assumption of monotonic relationships between storage and discharge in a link.
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