Analyze a Yield Alternative

Once ResSim has completed the Firm Yield simulation and reported a yield value in the demand rule, you may examine the results using the reservoir plot and the yield report.

The default reservoir plot ("Figure: Default Reservoir Plot with Releases") can be used to visualize the critical period and the point at which the reservoir was drained to the bottom of the conservation pool. For this example, adding the "release" variable to the plot allows for the viewing of the controlled outlet release, which represents the demand. The yield value is constantly released over the period of record.

The Yield Analysis Summary report ("Yield Analysis Summary Report") shows the information used in each iteration to achieve convergence. You can see the demand value used in each iteration and how close it was to the required storage and flow tolerances. The report also identifies the critical period.

Note: This is a cursory example of a firm yield analysis, provided only to guide you through some of the basics for setting up a one type of yield alternative. Setting up other types of yield analysis (such as hydropower and water account) use similar steps. A full summary of the available output and the process for fully examining a yield simulation is not described in this tutorial.