Hello,
I'm simulating a model with implicit solver. I'm getting a continuity error which is less than 5%. I'm simulating 1 hr storm for 24 hr duration. when I extracting results, in a one outfall (freefall), in the latter part of the outflow hydrograph a constant flow value was observed (it was expected to be zero after like 4 to 5 hrs).
When I observe the flows in the upstream of the network, I found this stretch which first create such constant flow value at the end of the outflow hydrograph.
How can such constant value can be generated? (I'm using SCS CN method for runoff generation, have changed certain parameters to reduce the continuity error. Using SewerGEMS latest version)
Thanks and Regards
Nishadi
What SCS Unit hydrograph is used in model? Default curvilinear or other ? Mostly if is only Storm water flow and not direct inflows it will try to match the storm event pattern. What is start type used in calculation options? Warm start of transition start?
Transition Start vs. Warm Start for the Implicit solver calculation options
Regards,
Sushma Choure
Bentley Technical Suppport
Dear Sushma,
I tried both methods. it appears in both cases.
Regards