Hello,
After the calculating the sanitary sewage system with Explicit (SWMM Solvers) solver in SewerGEMS, I received the "Not Converging (%)" parameter: 99 and "Flow Continuity Error (%)": -95 195 in summary.
I know that the lower the value of the above parameters, the better. Therefore, will the calculation results be reliable and authoritative in this situation? The model has 23712 manholes, 23867 conduits and 60 pressure pipes.
Hello Karolina,
High continuity error and high not converging % indicates issues with the model results. It indicates that you may need to review your user notifications, input data and advanced calculation options to achieve a more stable run.
This article has steps to troubleshoot the issues, please go through it.
Troubleshooting unstable SewerGEMS and CivilStorm results using the Implicit solver
If there are areas of concern, you can use the Hydraulic Reviewer to dig a little deeper into it.
Regards,
Sushma Choure
Bentley Technical Suppport
Answer Verified By: Karolina Świtnicka
Thank You, I will analize it.
I will also ask, what values of "Not Converging (%)" and "Flow continuity error (%)" are usually acceptable?
Generally values below 5 % are acceptable, that generally indicates a stable run but spot checking is still recommended.