Scenario input sets allow you to easily keep model structure, while switching between groups of input data and parameters. These may be used to represent changeable physical attributes, such as climate, land use decisions or even proposed infrastructure characteristics. You can switch between different scenario input sets to compare the effects on a model. For example, you can have one scenario input set consisting of rainfall, inflow and evapotranspiration data for natural conditions, another for wet conditions and a third set for dry conditions.
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- Add Scenario Input Set – create new scenario input set;
- Set Default – select this scenario input set to be the default;
- Add Child Scenario Input Set – create a new child scenario input set.
- Rename – change the name of a scenario input set; and
- Delete – remove a scenario input set.
Scenario input sets can define both input parameters and data sources. Input parameters specific to a scenario are defined in the Scenario Input Set Sets dialog, either manually or using a file. Data sources are assigned to scenario input sets using the Load Data Source dialog, as explained here.
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Child scenario input sets allow you to further refine model scenarios. A child scenario input set inherits all parameters and data sources specified in its parent. You can then set additional parameters, or alter existing ones. When you run a model with a child scenario input set, for any parameters that differ between the parent and child, the parameters from the child will take precedence.
Figure 4. Child Scenario Input Sets, Example
For parent and child scenario input sets:
- You can create 'grandchildren', thus creating nested scenario input sets. Every child scenario input set inherits all parameters above it in its branch, and ignores any parameters set in its children.
- Data sources can only be assigned to the root-level parents (Dry Weather, Wet Weather and Default Input Set in Figure 4). This is indicated by the
icon.
- Deleting a parent will delete all of its children.
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