Configure the global surge options

Step-by-step guide

When working in InfoSurge Pro, there are several global surge options that can be set after a successful hydraulic run. These options are accessible from one location in the Run Manager, on the Surge tab. Note that it is extremely important to first have a successful hydraulic analysis, since the results are used to determine initial conditions for the surge analysis.

1. Double-click the desired project .aprx file to open ArcGIS Pro.
2. Once the project starts, click the InfoWater Pro tab to open the InfoWater Pro ribbon.
3. In the Project panel, click Initialize.
4. From the Model Explorer, click Run to open the Run Manager.

5. Click the Surge tab to access surge analysis options.
6. Specify a Simulation Duration—for this example, use a duration of 300 seconds.

A typical transient analysis only runs for a few minutes or less.

7. Enable the Hydraulic Run Only option, so that only the initial steady state analysis will be run, and not the complete surge simulation.
8. In the Simulation Monitoring (Pressure Head) group box, set the Node ID to junction 10.

This is the node that will be monitored and displayed in the Simulation Progress view.

9. Choose a Display Range—for this example, set the minimum to 0 feet and the maximum to 500 feet.

This defines the pressure head range used for the Y-axis when viewing a graph of the results.

10. Set the Global Wave Speed to 3600 feet per second.

This value represents the velocity of a pressure wave for any pipe that does not have a wave speed explicitly set.

11. Set the Pipe Segment Length Tolerance to 10 feet.
12. Set the Cavitation Head to –33.21 feet.

To run a simplified surge analysis, pipe lengths may be adjusted so that each pipe is a length that ensures pressure waves will traverse the pipe in a time that is an exact multiple of the computational time increment. The Pipe Segment Length Tolerance field specifies the upper boundary for which these length adjustments will not exceed. The Cavitation Head value represents the head at which water will cavitate.

13. Click Run to run the surge analysis.

With Hydraulic Run Only enabled, this run is only a simple hydraulic analysis.

14. Click OK to save the changes and exit the Run Manager.
15. If a notification appears about switching to the most recent output data, click Yes.

To view the simulation results:

16. In the Model Explorer, scroll to the Hydraulic Results, OR:
17. From the ribbon, click Report Manager.

Note that with no surge events, the pressure and head at node 11 should remain constant during the run.

For more details about the options available in the Surge tab of the Run Manager, visit the Autodesk InfoSurge Help topic, Running a Surge Analysis.