Horizontal Cylindrical Detention
Horizontal Cylindrical Detention
(OP)
I am having trouble trying to use the Horizontal Cylinder storage function for a detention facility I am designing. The site has about 9 feet of in elevation. I have two catch basins acting as ponds with no storage in the area of higher elevation. Thus, the culverts for each are on very steep grades(>10%). I have set the grade on the horizontal cylinder to 0.5% so I don't have standing water after a storm event.
I have tried using a vertical orifice to reduce the flow from the system, but I get little or no reduction of flow. The only thing that I can figure out is that the steep grade of the pipe coming into the system is causing the pond to be in a pressure flow situation all of the time. Is there somethin that I am missing? What else can be done to model this situation?
Any and all replies are welcomed.
I have tried using a vertical orifice to reduce the flow from the system, but I get little or no reduction of flow. The only thing that I can figure out is that the steep grade of the pipe coming into the system is causing the pond to be in a pressure flow situation all of the time. Is there somethin that I am missing? What else can be done to model this situation?
Any and all replies are welcomed.





RE: Horizontal Cylindrical Detention
Storage = Horizontal Cylinder
Outlet = vertical orifice
The orifice should be part of the same pond that includes the cyclinder storage.
Check the pond summary carefuly to make sure everything is setup properly. Are there any warning messages? If so, you need to resolve them. Also review the stage-discharge and stage-storage graphs. Are these correct? If you still have problems, send the HCP project file to support@hydrocad.net
RE: Horizontal Cylindrical Detention
Thank you again for your quick reply. I really enjoy working with your product.
RE: Horizontal Cylindrical Detention
RE: Horizontal Cylindrical Detention