combining hydrographs and reflecting cumulative TC
combining hydrographs and reflecting cumulative TC
(OP)
multiple bioinfiltration swales are linked in a series. How do you model for the changing time of concentration as each subcatchment area contributes runoff, each swale fills up and then spills over into next downstream bioinfiltration swale with its own subcatchment area. I have tried pairs of subcatchments and ponds and areas are added but change in TC (for the time to fill each pond) does not seem to be reflected.





RE: combining hydrographs and reflecting cumulative TC
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: combining hydrographs and reflecting cumulative TC
More about detention time at www.hydrocad.net/detentiontime.htm
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: combining hydrographs and reflecting cumulative TC
If my TC's are generally about 23 minutes, why does the peak rate of inflow show up at a time of 12 hours?
RE: combining hydrographs and reflecting cumulative TC
With a type II storm, the peak rainfall occurs at 12-hours, so the peak runoff will always occur after 12-hours, depending on the Tc. For details please see www.hydrocad.net/runoff.htm
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: combining hydrographs and reflecting cumulative TC
What does the atten and lag mean?
RE: combining hydrographs and reflecting cumulative TC
The attenuation indicates the reduction in the peak flow, and the time lag is the delay between the inflow and outflow peak. For further details please click that portion of the pond summary report.
BTW: Please start a new thread for a new topic, rather than tagging it onto an old one. This makes it possible for everyone to follow their specific topics of interest.
Peter Smart
HydroCAD Software
www.hydrocad.net