It's a nice shot, but I think the image would have been more powerful had you captured the width of the river. But still, I like it! All the little steps in it make it an intriguing photo.
To be brutally honest it leaves me a little bit cold. I'd like to see a wider or closer detail. For some reason I want to know what's on the right because the rushing water is more furious there and it draws your eye right and you're thinking "what's there?".
Also, is it just me, but would it have worked better horizontally? Good exposure though, it's very difficult to get water right with all the crazy light from the rushing.
well... for me it lacks "warmth"... i have no idea if you understand what I mean. I see here the water... and a bit of green places... but the light is very "blue" and "cold" maybe try reshooting it on a sunny day??? with nd filter?
but as a play withlong exposure on the water - it is very good!