Dear All,

I have an interesting SWMM application for you'all: let's say I want to
model a braided channel design in a riparian wetland with EXTRAN. The
braided channel will have 3 channels designed to have roughly the same
HGL. However, these channels will routinely flood and I want to make
sure I account for both the flow split between the channels at low flow
and the storage when the channels go overbank. Ultimately, I want to
create a water depth-duration relationship for the channels and the
overbank area.

Right now I am thinking I will just model the same area twice: the first
time I confirm that I'm getting the flow split I want at low flows. The
second time I just model the entire area as a storage accounting for the
storage of the low flow channels as well as the overbank area.

Any ideas on this? If you think this an application for another model
please let me know. I am still considering the use of RMA2 for this
problem.

Thanks for any and all suggestions.
Scott Dierks, PE
SDierks@ALNM.COM