I think you should read this -- How to Get Your Rivers in the Right Place: http://www.cartographersguild.com/showthread.php?t=3822
-- before the River Police stop by to explain that rivers don't split going downstream, they don't empty into the sea in multiple mouths, they don't have channels that connect two separate rivers, and lakes have an outlet to the sea.

It's a pretty map, but it needs to feel real. Here is another thread that might also help with that -- The Most Common Reality Errors: http://www.cartographersguild.com/sh...ad.php?t=30156 . You can always claim "magic" if you want to do silly things, but if you know the geology, you won't have to