Scaled the river start and end, made numerous other adjustments, and fixed a few bugs.
Thinking about a system of lakes that leads to more rivers. Water tiles that are completely surrounded by land will be easy to turn into lakes. Water that consists of several tiles could be a little more difficult without implementing some form of A*. So, I may implement 1 tile lakes and then come back to it when I have some algorithms that can do the job.
I will also consider methods of creating swamps and flood plains using rivers.