HydraFlow Pond Tools - Initial Pond Elev

[cameron86]

I am having some troubles interpretting HydraFlow's pond tools.. Right now I am sizing outlet structures for a detention pond with a certain hydrograph input.

The trouble is that I don't think that the Pond Tools function is running the model with the initial elevation set at the top of the riser I have specified.

In the Model tab, I have the pond routing set with an initial "wet pond" elevation just below the top of weir. But, in the Pond Tools it does not seem to be matching up.

Below are two pictures in the pond tools function showing the Stage-Discharge plot and the schematic. On the schematic you can see that the max elevations from each storm event are just filling the pond from the bottom (Stage 0) The events with lesser volumes don't even make it to the top of the riser.

http://files.engineering.com/getfil...0c-4681-b763-d031e39a03c1&file=Pond_Tools.PNG

http://files.engineering.com/getfil...3-4967-93cd-ac1ecc723510&file=Pond_Tools2.PNG

The route model output seems different with a max elevation from each event above or at the crest of the riser. (Multistage riser with 1 at stage 5 and the other at stage 7.1) Below are two pictures of the route output.

http://files.engineering.com/getfile.aspx?folder=356fd866-804f-4ff4-b650-be4f024e993a&file=Route.PNG

http://files.engineering.com/getfil...6-9450-49ac-aa01-15c18f4646bb&file=Route2.PNG

Any help or advice is much appreciated.