I really do love the water effect on photo edits like these, I know it's something to do with long exposure - I'm not really that knowledgable on the technical aspects of photography.
The second photo is my favourite, it looks almost etherial with ghostly trails rolling down and the icy tops of the rocks.
I hope you are feeling better soon, the rapid change to winter has for us brought on many colds and illness (fortunately I have escaped it so far), combined with the dark coming early on an evening it is making every day feel much harder.
Thanks, the second is my favorite also a more natural photo
A longer exposure smooths out the motion of the water and gives a more silky feel which works well with flowing water