OK a number of things which might improve this a little (I hope).
First, theres a blue/green cast to the image, correcting that would add some warmth. Second, structurally theres no anchor to the photo, it needs some foreground interest, a rock, a tree, a gate .... Third, the eye follows the river nicely but then gets stopped by the trees on the left bank. We need some way of allowing the eye to flow round the corner and on into the distance, or at least to come to rest on a point of interest. Fourth, a nice frame would help set this off, I use 10 pixel black, 10 pixel white, 100 pixel black as a standard uncomplicated frame.
Hope thats not too negative, its not intended to hurt but to maybe help a little.