Very nice pictures. Do you use anykinds of lenses like Circular Polarizer Lense? Shooting water usually benefits alot from Circular Polarizer lense and also brings out blues and greens out, while removing reflections. IMHO CPL is well worth of owning.
Your pictures are really good. You have good eye. Like in that first picture you have also details in foreground. Twings and log. It IMHO makes picture full and living I'd say.