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When comparing the text mass balances in SWMM5 and InfoSewer to the Mass Balance in the ICM InfoWork PRN file, a few potential issues may arise:
A different number of rows: Each software may report data in a different format and level of detail. For instance, the PRN file does not explicitly show the infiltration and evaporation totals or break out the total inflow row into WWF and DWF components.
Less detail in the PRN file: The PRN file from ICM InfoWorks may contain less detailed information compared to the output from SWMM5 or InfoSewer. This could mean that certain specific details about the system's performance (like inflow or outflow rates at specific points in the system) might not be directly comparable.
Different units in the PRN file: If the PRN file uses different units of measurement compared to SWMM5 or InfoSewer, the direct comparison of values becomes complicated. Any comparison would first require unit conversion to ensure that the same aspects of system performance are being compared.
The key reason to conduct this comparison is to have a quick and interactive check of the overall mass balance in models converted to ICM InfoWorks. This is important to ensure that the conversion of the model from one software to another has not introduced significant errors or discrepancies. This comparison can help identify potential issues early in the process, and ensure that the converted model accurately represents the system's behavior.
It's also essential to understand that while these checks can provide a valuable sanity check, they won't catch every possible error or discrepancy. Detailed validation and calibration of the converted model will still be necessary to ensure its accuracy.