I used simple schematic to check the mass balance of the model.  When I change the channel bed width, outflow hydro-graph peak was reduced but no time lag of the peak. I have found there is a system loss by internal outflow and due to that, I couldn't maintained the mass balance of the event.  Can any one let me know how can I change the bed width while keeping the mass balance for the same input rain fall.

Thank you

Capture.JPGCapture2.JPG

You need to be a member of SWMM 5 or SWMM or EPASWMM - (not formally associated with EPA) to add comments!

Join SWMM 5 or SWMM or EPASWMM - (not formally associated with EPA)

Email me when people reply –

Replies

  • Hello,

    If the channel volume is much larger due to your larger width then a smaller time step, the keep option in dynamic wave options will help or should help.

This reply was deleted.