This is quite nice...couple of things that 'jumped out at me'

  1. The texture on the water seems a bit overwhelming to me, you might consider toning it down a bit.
  2. In the southeast you have what appears to be a river going from coast to coast. As a member of the 'River Police' I would be remiss in not pointing out that this doesn't normally happen. Of course if you have a reason for it, then just ignore this.

Keep up the good work.