Mr. Spitzer,

I have done this in extran, but there is a 5 conduit limit for any one junction. It appears your pond has 6 connecting conduits (5 in, 1 out). You will have to "merge" two of your inlet pipes into a dummy channel in order to have only 5 connecting conduits. Then use a storage node as the pond.

This has worked well for me. I simultaneously modeled 28 outfalls to a lake by grouping the outfalls into "branches" (dummy channels) of the lake.

Hope this helps.

Andrew B. Scott, P.E.
ascott@RKKENGINEERS.COM