Model Outlet Structure with Inlet Pipe Then Weir Then Outlet Pipe
Model Outlet Structure with Inlet Pipe Then Weir Then Outlet Pipe
(OP)
What is the proper way to model an outlet structure that is designed with an inlet pipe from the pond then has a broad crested weir in the middle of the sructure and then on the oulet side has another outlet pipe. I have attached a sketch of the structure. I am questioning the proper routing since the water will be originally flowing into the 24" pipe then for low flows will go through the 6" orifice in the weir, then at higher flows overtop the weir and finally through the outlet pipe.





RE: Model Outlet Structure with Inlet Pipe Then Weir Then Outlet Pipe
Device#1=48" outlet culvert, routing=Primary
Device#2=6" orifice, routing=Device#1
Device#3=weir, routing=Device#1
If you want to consider the effect of the 24" inlet pipe, you could use a custom weir/orifice to handle the flow split:
Device#1=48" outlet culvert, routing=Primary
Device#2=Custom weir/orifice, routing=Device#1
Device#3=24" inlet culvert, routing=Device#1
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: Model Outlet Structure with Inlet Pipe Then Weir Then Outlet Pipe
If you want to consider the effect of the 24" inlet pipe, you could use a custom weir/orifice to handle the flow split:
Device#1=48" outlet culvert, routing=Primary
Device#2=Custom weir/orifice, routing=Device#1
Device#3=24" inlet culvert, routing=Device#2
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: Model Outlet Structure with Inlet Pipe Then Weir Then Outlet Pipe
Pond 1 = actual storage with 24" culvert outlet, routed to pond 2.
Pond 2 = zero-storage pond with the orifice/weir control structure and final culvert:
Device#1=48" outlet culvert, routing=Primary
Device#2=6" orifice, routing=Device#1
Device#3=weir, routing=Device#1
The solution requires a tailwater-sensitive routing procedure in order to handle the tailwater effects of pond 2 (the control structure) on pond 1 (the actual storage).
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: Model Outlet Structure with Inlet Pipe Then Weir Then Outlet Pipe
Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com
RE: Model Outlet Structure with Inlet Pipe Then Weir Then Outlet Pipe
Peter Smart
HydroCAD Software
www.hydrocad.net