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A multi-trace analysis is a batch process that runs multiple and separate source trace analyses for each individual trace. It allows you to track over time what percentage of water reaching any node in the network had 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.
To set up the simulation options:
Be aware that 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. If you were to choose All Reservoirs here, then the analysis would include only true water sources.
To view the multi-trace results without the Map Display tool:
To run the analysis:
To view the results of the multi-trace analysis:
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.
IMPORTANT: 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. So, it is important to understand that the total percentage of water combined from each source may not total 100%. You can use a trace analysis if you require more detail.