The model does not create the correct streams. There are sharp diagonal shards on the maps that should not be there.
InVEST-seasonal_water_yield-log-2026-06-04–10_20_51.txt (82.8 KB)
I have tried different DEM’s, higher and lower threshold flow accumulation (higher looks better but still incorrect). I have aligned all rasters, crs’s are the same.
How do I solve the issue?
Welcome to the forum @Livia !
Thanks for including your log file, it lets us know that you’re using the MFD flow direction algorithm, which creates somewhat different streams than D8. Have you tried the D8 flow direction algorithm? How do the streams compare with those produced by MFD?
It would also help to see an image of the stream network, which you can upload with a forum post.
Are the diagonal shards being created in areas that are very flat? It’s very hard to model streams in floodplains and other places that are very flat, with no elevation change to tell the model where streams would collect. So check that out too and let us know. Thanks!
~ Stacie