Step 8. Calibrate the RTK Hydrograph Parameters

Automated calibration is another powerful tool that RDII Analyst offers. The calibration tool identifies optimal parameters of the RTK hydrograph to match the RDII flow simulated by InfoSWMM H2OMAP SWMM with the RDII time series identified by RDII Analyst using the decomposition process described previously. The RTK parameters that can be calibrated may be selected by the user from the 12 parameters available to choose from.

1. You may initiate the RDII Calibration Parameters page by clicking the ( ) button from the toolbar or from the menu Analysis -> Calibrate RDII Parameters. Specify the minimum and the maximum ranges shown below for each parameter.

2. Click . The Calibrate RDII Parameters dialog editor would be initiated.

3. Click the Options button to adjust the GA Options to match the following.

4. Click the Run button. The number of trial runs made so far, the maximum number of trials to be made and the best fitness obtained from the trail runs made so far would be shown while the model is running. If there is no significant improvement in the fitness for some time (i.e., from generation to generation), then the calibration process would be stopped. Once the calibration run is completed, the RDII flow simulated by the optimal RTK parameters identified by the calibration process would be compared graphically with the RDII time series obtained from the decomposition process. In addition, the optimal RTK parameters identified by the model would also be presented in report form as shown below.

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