absolutely beautiful capture. not too keen on the treatment of the clouds, though. this might have been a more dynamic image if you had cropped in tighter to the falls, leaving out the sky altogether. just a suggestion, hope this does well for you. good luck!
I think you should've come closer to the water and remove the dirty beach out of the picture. Would be truly wonderful. Perhaps you can still do that by cropping.
The colors in this shot make it seem somehow...dirty--in an industrial way. Don't know quite how to say it. Not that this is bad: I just thought that that was an fascinating clash with the nature that is shown in the image.
It does seem to me that the shore is a little distracting and doesn't really add enough to the shot to make it worth keeping. Perhaps a slightly better angle would have allowed you to keep it out of the shot and focus more on the waterfall?