The Replicate Analysis run configuration in Source allows users to run the same model scenario multiple times using input time series replication. The replicate analysis functionality uses a cycled input data concept in which the data for the first year in the simulation is shifted progressively by a year or selected year increments. In this way multiple instances of any Source model are can be run using input data from the model input files derived using the cycled data concept and to allow , allowing extraction of results for the replicateseach replicate. This is useful when the user wants to get an idea of the risk associated with the decision variables. For instance, 'Replicate Analysis' can be used to assess the risk of spill in reservoirs under varying input climate conditions.
Once the user has defined the required number of replicates and increment and selected the data source to be cycled, the Source model runs for each replicate and provides an output for each replicate in the Results Manager. For example, if the data source selected for cycling is time series of rainfall data, it is used for multiple simulations using the same model scenario to produce the required outputs such as downstream flows. In this way the user can analyse the effect of changes in rainfall patterns on the downstream flows.
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To use this functionality, first the user has to select the 'Replicate analysis' option from the run configuration drop-down list on the Simulation toolbar (Figure 1).
Figure 1. Simulation toolbar- Replicate analysis
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It is to be noted that if If a new version of Source is installed and used for the first time, the 'Replicate analysis' option has to be added using the 'Add new configuration' tab of 'Edit>Scenario Options>Running Configurations'. |
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Once the 'Replicate analysis' is selected, the user can then configure the replicate run. There are two new configuration tabs associated with this functionality, replacing the standard Run Configuration tab for a ‘Single Analysis’ run: 'Run Configuration' and 'Data Sources Configuration'. The 'Run Configuration' tab of the configuration window appears as in Figure 2.
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