I have one main channel and two tributary channels that I am trying to model. I have my cross sections cut, which are identical cross sections only the center point has been moved to the center of each channel. The downstream reach lengths are all the same as well. Is it a problem if the cross sections for the different channels overlap in the graphic, even though they are exactly the same?
Looking for tips. The scenario I am working with, is this is a large floodplain. Once the water surface elevation rises high enough to exit the main channel banks, all other channels are flooded as well. I’m not sure how to model that. If I break the cross sections between the different channels, I then wind up with vertical walls at the cross section extents. Any advice and tips is appreciated.
One workaround is to connect both cross sections using a lateral structure with low weir coefficient to simulate flow across both cross section in the event of over topping.