Hi,
I am running a 1D sediment model for a sandy creek. I have a working model that has started to not work after small changes in the geometry (adding a sediment basin). Instead of a typical error, the model stops running about halfway through with a note in the Sediment Input Summary stating “Undefined sediment mass adjust” at a XS in the middle of the geometry. The note has appeared at a XS at the very upstream, too, in previous runs. I’ve tried altering the computation intervals, movable bed limits, and tried different combinations of the transport function, sorting method, and fall velocity method. One lead I have is that it seems to occur when the transport energy slope method is averaged (centered) instead of the default, local (Q/K)^2. Any ideas on how to get how to address this issue or what it means?
Thank you!