Yeah, that river has a problem, nothing major. The delta part looks fine but further up the river there is a split...that's a no-no. It splits and goes to two separate places. So what I would do is to chop the northern part off from the main river and instead have it sort of curl up to the north into Araratia. The double outflow from the lake is a technical violation but I'm not real picky about that...just put a swamp there Someone else might know more about that than I do, though. Otherwise it looks pretty good.