I'm evaluating SWMM to determine if it can be used to route two connected ponds. I put together a model
in an attempt to learn the procedure and evaluate the performance of SWMM since I have an upcoming project that will require this analysis.
The first pond receives a simple time series and the two ponds are connected by a single pipe.
The second pond act like a diversion when a certain stage is reached and flow passes thru a weir but has a single culvert acting as an outfall for a majority of the discharge.
Attached is the model which runs successfully. I'd like some SWMM experts to comment on my model and provide input as to its correctness for modeling interconnected ponds. One question I have is whether the ponds should be modeled with an orifice or if the culvert is sufficient. All input is appreciated.
Replies
Hi,
You model looks well constructed to me and I would only use an orifice if you have an orifice in the outfall structure of the second pond. i do have two suggestions:
1. Use the KEEP option for routing as you are interested in the effect of downstream areas in your connecting conduits and using the full st venant is better for ICP routing,
2. In your culvert use the culvert codes so that the FHWA equations will be used (if needed) for your submerged culvert flow
Bob,
Thnaks for those suggestions. They are invaluable to me. I was unaware that SWMM can use the FHWA equations and are indeed needed. I am really sold on SWMM.
gerry