Gorgeous map! You know how to work those programs pretty well!

And yes, there are some river violations. Clearwash is the worst because it just goes from one coast to another. Rivers flow downhill from mountains. Blightwash I don't see as a problem, because that area looks clearly "Marshy" to me, and rivers can turn into deltas at salt marshes near the ocean. They branch off there and can do lots of things rivers don't normally do.

Rhone in a real world setting probably wouldn't exist, unless as someone mentioned, there are massive amounts of tidal water pushing their way up to the Everflow.

But that whole "Fertile Stretch" area is a mess.


I think that supernatural explanations for why rivers don't flow naturally rarely hold water. (Pun intended) Because as long as a world has gravity and rain falls, rivers are going to do what rivers do. So if a river doesn't do what it's supposed to do, there should be a good reason for it. This can be that people diverted the flow somewhere else, but this would likely be called a "canal" or a "Channel" or something like that, rather than a river.