Flow Routing Continuity Error in SWMM 5.0.011

[andy_a]

Hello everyone!

I have a SWMM model built using SWMM 5.0.006 consisting of about 270 links. When I run this model under dynamic wave in SWMM 5.0.006 version, the flow routing continuity error was only 0.052%.

However, when I tried running my model using the newly released SWMM 5.0.011 version, the flow routing continuity error was dramatically blown up to -94.202%.

It seems that the difference lies in the calculation of External Outflow: for SWMM 5.0.006 the outflow is 163 Mliters, while for SWMM 5.0.011 is 284 Mliters.

Could someone please tell me what's going on in SWMM 5.0.011?

I really would appreciate any reply.

Thank you!