A good idea, but not a great shot. Tough one to expose just right, if indeed it is possible. I have my doubts looking at this because the top right corner is way hot and the top left corner is really dark. I think there is no medium which means you must sacrifice one part for the other. That puts you in a lose-lose situation. Maybe a different angle on this would've left you more options.
This is beautiful! I love the action and motion of the water, the lush green on the rocks and the composition is well done. The only distracting thing to me is the rock poking in on the right side bottom, putting my paper up there to crop it out and the shot really comes alive for me. Well done! A 9