I've highlighted the problematic parts of your rivers.
Green for divergence, cyan for places where the rivers don't appear to be flowing downhill unless you have some very strange terrain that isn't being indicated, yellow for deltas that are too big for the river systems feeding them, and red for a river/lake system starting very close to an endorheic lake. The east lake requires lots of rainfall to form, while the west lake requires an extremely arid climate to avoid overflowing and having an outlet.
Thanks! I didn't notice those divergent ones lol, I think i might keep one (I'm sure it happens) but I'll definitely par them down. As for the other problems, I'll fix those right up. Thanks for the tips :)
Sometimes a minor stream will branch off from one river to another completely different one that passes near by. But it's a temporary or intermittent phenomenon that can only occur in special circumstances. Artificially maintained canals can do this too.
Originally Posted by Delvestius