Parabolic weir discharge from a pipe.
Parabolic weir discharge from a pipe.
(OP)
I have a situation where I need to keep a pump fed with water that is flowing through a pipe with a negative slope. I set up a pond node with the culvert and an arbitrary storage area extending beyond my ranges of concern. When I check the discharge at low head levels (below the midpoint of the culvert), I get the same discharge for a positive slope as for a negative slope. It seems unlikely that both discharges would be identical. What equation is HydroCAD using for a parabolic sharp crested weir? Is there a setting that I'm missing? Thanks.





RE: Parabolic weir discharge from a pipe.
If your culvert is weir controlled, the stage-discharge relationship could be the same for both slope conditions (with head measured above the higher invert).
If you have further questions please post your HydroCAD project file or send it to HydroCAD support.
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: Parabolic weir discharge from a pipe.
RE: Parabolic weir discharge from a pipe.
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: Parabolic weir discharge from a pipe.
RE: Parabolic weir discharge from a pipe.
Peter Smart
HydroCAD Software
www.hydrocad.net
RE: Parabolic weir discharge from a pipe.
RE: Parabolic weir discharge from a pipe.
Peter Smart
HydroCAD Software
www.hydrocad.net