The green water is great. I'd have lost the border and given us more picture. This looks like a cool place to get some pictures. It might be better if you took a few steps back and really awed us with this little bit of rapids in a little more entirety
An effective image with a raw energy that fits the challenge well. technically, I might have either taken this with a fast shutter and frozen all the water OR a slow speed and made it all smooth. You perhaps did not have the choice given that it was a bright day but a minor point is that the fuzy water middle left appears out of context to the rest of the action. Minor though. Well observed