I like the composition. It would be much better if you had a longer shutter speed--say a few seconds rather than the 1/8 it was shot at--to blur the water's motion. Unless you were trying to stop the motion of the water, which doesn't work for me in this case.
It looks a tad underexposed. A simple levels adjustment should take care of that. Needs more saturation to get those greens to pop out, more contrast wouldn't hurt, and some sharpening.
I'd show you what I'm talking about but it's not OK to edit your photos, so...
You have some blurring in the upper-left part of the image. It's not from depth-of-field, and it's not motion blur either because everything else is fine. Is your lens defective or something?