What I've got so far, the river was heavily photoshopped as well as random pieces of the coast. I usually end up wiping out and redoing stuff at least once but I think I can get it pretty close. The river will be redone at least one more time...
http://i.imgur.com/jRJb8X9.pngEDIT: Second picture fixed:
http://i.imgur.com/kPjFju4.png