Performing a Multi-Trace Analysis

Performing a Multi-Trace Analysis

Step-by-step guide

A multi-trace analysis is a batch process that runs multiple and separate source trace analyses for each individual trace. Over time, it allows tracking of the percentage of water reaching any node in the network, with its origin at a particular set of nodes. The source nodes can be any node in the network, including tanks or reservoirs. Internally, the program treats the nodes as a constant source of a non-reacting constituent that enters the network with a concentration of 100.

  1. To open ArcGIS Pro, double-click the desired project .aprx file.
  2. Click the InfoWater Pro tab.
  3. On the InfoWater Pro ribbon, in the Project panel, click Initialize.
    On the ArcGIS Pro ribbon, the InfoWater Pro tab active, and in the Project panel, Initialize being selected and highlighted in red.

Start a multi-trace water quality analysis by setting up the simulation options.

  1. In the Model Explorer, select the Operation tab.
  2. Expand the Simulation Options folder and double-click WQ_CL, Chlorine Analysis.
    The Model Explorer, with the Operation tab selected and highlighted in red, and the Simulation Options folder expanded, with WQ_CL, Chlorine Analysis called out with a red arrow.
  3. In the Simulation Options dialog, click Clone.
    The Simulation Options dialog, with Clone being selected and called out with a red arrow.
  4. In the New Simulation Options popup, enter a New ID, such as “WQ_MT, Multi-Trace Analysis”.
  5. Click OK.
    The New Simulation Options popup, with a New ID entered and highlighted in red, and OK being selected and highlighted in red.
  6. Back in the Simulation Options dialog, click the Quality tab.
  7. In the Type group, select Multi-Trace.
  8. Make sure the Trace Node field is blank and Multi-Trace is set to All Storage.
    The Simulation Options dialog, with the Quality tab selected and highlighted in red, Multi-Trace selected and called out with a red arrow, and the Trace Node and Multi-Trace on fields highlighted in red.

The All Storage option includes all tanks and reservoirs. When tanks are used as the source, all water leaving the tanks is attributed to the tank versus the source that provided it. Selecting All Reservoirs will result in an analysis that includes only true water sources.

  1. Click OK.
    In the Simulation Options dialog, on the toolbar, OK called out with a red arrow.
  2. Before running the multi-trace analysis, on the InfoWater Pro toolbar, in the View panel, click Reset Map Theme.
    The InfoWater Pro tab, View panel, with Reset Map Theme being selected and called out with a red arrow.

This step is necessary because multi-trace results are not viewed using the Map Theme tool.

Now, run the analysis.

  1. In the Model Explorer, click Run.
    The Model Explorer, with Run being selected and highlighted in red.
  2. In the Run Manager, Standard tab, select the appropriate Simulation Options, such as WQ_MT, Multi-Trace Analysis.
  3. Select a Time Setting, such as WQ, Water Quality Analysis
  4. Click Run.
    The Run Manager, with the Simulation Options and Time Setting fields set accordingly, and highlighted in red, and Run being selected and called out with a red arrow.
  5. When the simulation has completed successfully, click OK.
    The Run Manager, with OK called out with a red arrow.

To view the results of the multi-trace analysis:

  1. In the View panel, click Report Manager.
    The View panel, with Report Manager highlighted in red.
  2. In the Report Manager dialog, click New.
    The Report Manager, with New being selected and highlighted in red.
  3. In the Output/Report Graph dialog, in the Tabular Report list, select Multi-Trace Report.
  4. Click Open.
    The Output Report/Graph dialog, with Multi-Trace Report selected and called out with a red arrow, and Open being selected and highlighted in red.
  5. In the Report Manager tabular report, change the output time to 120:00 hrs.
    In the Report Manager tabular report, the output time set to 120:00 hrs and highlighted in red.

This report details the percentage of water that comes to each junction from each source at the specified time. Nodes adding up to more than 100% receive flow from a tank that is supplied by the reservoir.

The multi-trace function is a batch process that runs multiple and separate source trace analyses for each individual trace. It is not a simultaneous solution of multiple source traces; therefore, it is possible that the combined traces do not fully satisfy continuity, especially with tanks that experience both incoming and outgoing flows. Be aware that the total percentage of water combined from each source may not total 100%.

If more detail is required, use a trace analysis.

  1. After reviewing the table, Click Hide to close the Report Manager.
    The Report Manager, with Hide being selected and highlighted in red.