Watch your river splitting. If that one in the south is meant to be a delta then you might want to reign it in quite bit and make the branches closer to the coast and that one in the west (the main river is dumping everything into the ocean but it somehow continues on down the beach and empties in another spot). The other rivers look fine as the "branches of the tree" are near the mountains and not the coast. Now you just need to put the rings in the harbor.