Have folks been experimenting with 1d/2d time slicing? Generally you would have your 1d model run on a larger timestep (eg 1min) and have your 2d area (eg 10 sec). This is of course model dependent and base on cell spacing, cross section spacing, and average velocity.
Has anyone experimented with this much and used this with success? The one model I tried it on was less stable with the time slicing.