How does TR-20 add hdrographs?
How does TR-20 add hdrographs?
(OP)
I have 3 tributary areas delineated for use in TR-20. A flows into B. B flows into C. Ponding occurs in C because of a restrictive culvert. Is it accurate enough to ADDHYD A and B, then ADDHYD A+B and C, then route the final ADDHYD through a RESVOR created by the culvert? Or should I route the runoff from A through a REACH in B, then route the runoff from A through a REACH in C and route the runoff from B through a REACH in C to the culvert then route the 3 seperate hydrographs through a RESVOR created by the culvert? Thank you for your help.





RE: How does TR-20 add hdrographs?
If you use the intermediate reach routing, then the Tc for each subcat should extend up to, but not include the reach itself.
If you eliminate the reach routing, then the Tc for each subcatchment should include the entire flow path up to the pond.
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: How does TR-20 add hdrographs?
RE: How does TR-20 add hdrographs?
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: How does TR-20 add hdrographs?
RE: How does TR-20 add hdrographs?
Peter Smart
HydroCAD Software
www.hydrocad.net