Bentley WaterGEMS CONNECT Edition Help

Calibrating Your Model with Darwin Calibrator

Calibrator (as well as Designer and Skelebrator) are components that initialize their data when first used, so one needs to at least open the component for those database fields to be created in the current model.

Note: As an example, if you are trying to use ModelBuilder to import calibration data but have never opened Calibrator in this particular model, you will not see the "Field Data Snapshot" model type in the dropdown list for Table Type. This is because that database type and its associated fields haven't been initialized yet. You would click on Analysis > Darwin Calibrator first in the main menu. Once this is done, the Field Data Snapshot and other Calibrator related fields are created, and those options will then appear in the ModelBuilder dialogs.

The Bentley WaterGEMS CONNECT Darwin Calibrator provides a history of your calibration attempts, allows you to use a manual approach to calibration, supports multiple field data sets, brings the speed and efficiency of genetic algorithms to calibrating your water system, and presents several calibration candidates for you to consider, rather than just one solution. You can set up a series of Base Calibrations, which can have numerous Child Calibrations that inherit settings from their parent Base Calibrations.

Use Base and Child Calibrations to establish a history of your calibration trials to help you derive a list of optimized solutions for your water system. Inheritance is not persistent. If you change the Base Calibration, the change does not ripple down to the Child Calibrations.

You can adjust your model to better match the actual behavior of your water distribution system by using the Darwin Calibrator feature. It allows you to make manual adjustments on the model as well as adjustments using genetic algorithm optimization.

The left pane of the Darwin Calibrator dialog box displays a list of each calibration study in the current hydraulic model, along with the manual and optimized runs and calculated solutions that make up each study.

The following controls can be found above the list pane:

New Clicking the New button opens a submenu containing the following commands:
  • New Calibration Study - Creates a new calibration study.
  • New Optimized Run - Creates a new optimized run. Use this command if you want WaterGEMS to efficiently process and evaluate numerous trial calibrations of your water system. You can set the optimized calibration to deliver several solutions for you to review.
  • New Manual Run - Creates a new manual run. Use this command if you want to test fitness by adjusting roughness, demand, or status manually. If you have specific solutions in mind, Manual Calibration might let you quickly narrow-down or refine the number and measure of adjustments before you use the genetic algorithm.
Delete Deletes the calibration study, manual run, or optimized run that is currently highlighted in the list pane. Deleting a study will also delete all runs that are a part of that study. Deleting a run will also delete any child runs based on it.
Rename Renames the calibration study, manual run, or optimized run that is currently highlighted in the list pane.
Compute Opens a submenu containing the following commands:
  • Compute: Computes the optimized or manual run that is currently highlighted in the list pane.
  • Hierarchy: Computes the highlighted optimized or manual run as well all the optimized or manual runs branching from it hierarchically.
  • Children: Computes the highlighted optimized or manual run as well as all the calibration runs derived from it.
  • Batch Run: Opens the Batch Run Dialog, allowing you to select multiple runs to compute together.
Export to Scenario Opens the Export to Scenario dialog box, allowing you to export the solution that is currently highlighted in the list pane to a new or existing scenario, alternative, and/or set of alternatives.
Report Opens the Report Viewer, which displays a detailed report of the solution that is currently highlighted in the list pane.
Graph Opens the Correlation Graph dialog box, which displays a graph of the solution that is currently highlighted in the list pane.
Help Opens the online help.

The right side of the dialog contains controls that are used to define settings and input data for Calibration Studies and their component Manual and Optimized Runs. The controls available on the right side of the dialog box will change depending on what is highlighted in the list pane:

Calibration Studies

Optimized Runs

Manual Runs

Calibration Solutions

Calibration Studies
Optimized Runs
Manual Runs
Calibration Solutions
Importing Field Data into Darwin Calibrator Using ModelBuilder
GA-Optimized Calibration Tips
Parent topic: WaterGEMS CONNECT Edition Help