Very cool. I would like to offer the suggestion that it is maybe a little dark for my liking, could just be the time of day though. I love the composition and if it were taken a little earlier in the day would be perfect. Nice job.
The water effects is good. I think the 50:50 split puts too much emphasis on the sky which is rather plain for a sunset. I don't think it is too dark as such but perhaps a little later in the day to get more colour would have been better.