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ScenarioTransferNode ScenarioTransferNode

The Scenario transfer node (STN) handles the joining of two scenarios and conceptually comprises of two components, the upstream STN and downstream STN (as shown in Figure 1). The node links two scenarios and runs them together. Constituents, orders and ownership are passed between the two scenarios. However, off allocation does not operate over scenarios, instead, the STN operates like an off allocation boundary - similar to the transfer ownership node.

The STN operates in either a connected or disconnected mode:

• When running in connected mode, the upstream STN passes all components of the upstream scenario to the downstream STN, hence linking the two scenarios together; and
• In disconnected mode (ie. scenarios are run independent of each other), the downstream STN acts like a minimum flow requirement node and the upstream STN models an inflow node.

Figure 1. Scenario Transfer node

Configuring an STN

Configuring a STN requires configuring both the upstream and downstream STNs. First ensure both upstream and downstream scenarios are in the same project (see Importing Scenarios. 

Then, in the upstream scenario:

• Add an STN at an outlet of the model. In a catchment scenario you can change the node model, in a schematic scenario, you can add an STN and connect it with straight through link. When connected, the STN node will automatically change to only show the upstream component.
• In disconnected mode, this node will act as a minimum flow requirement node. If desired, use the STN feature editor to configure the minimum flow requirements.

Configuring the upstream STN

In the upstream scenario

Constituents

A model will operate even if the constituent processing methodology (lumped or marker) is different for each scenario. For example, consider the pitcher scenario is configured with lumped routing and the catcher scenario with marker routing. Constituents will be passed from the pitcher to the catcher even though the methodology is not the same.

Once constituents are defined in both the pitcher and catcher scenarios, you can map constituents between the two scenarios using the STN feature editor. Choose Connected > Constituent Mapping from the tree and click Add (as shown in Figure 2). 

Figure 2. STN, Constituent mapping

Ownership

Ownership can be set up in linked scenarios using Connected > Ownership in the feature editor (as shown in Figure 3). Configuration of ownership is similar to the Transfer ownership node (when set up as a boundary node). 

Figure 3. STN, Ownership