Pond Routing
Pond Routing
(OP)
As per the HydroCAD Owner's Manual, pond routing assumes basically a "zero-velocity level pool" and "If the velocity approaching the outlet device(s) is significant, pond routing may underestimate the discharge and overestimate the peak elevation and storage of the pond.".
Questions:
1. What would be defined as "significant"?
2. If I modeled pipes (closed drainage) as ponds, wouldn't they all fall within the above statement?
Questions:
1. What would be defined as "significant"?
2. If I modeled pipes (closed drainage) as ponds, wouldn't they all fall within the above statement?
RE: Pond Routing
Regarding "modeling pipes (closed drainage) as ponds", if you are talking about underground storage in the pipes, this is level-pool storage with zero velocity. The fact that you are using pipes to provide the storage is irrelevant. In this situation the pipes are not being used as an outlet control, so the entire issue of approach velocity does not apply.
Peter Smart
HydroCAD Software
www.hydrocad.net