Visible Currents

It was an unusual fall in western Oregon in 2011, because the October rains never came and so all the falling leaves choked the small streams that were normally raging torrents by that time of year. I took this photo at a small pool up an unnamed creek on the Umpqua National Forest. The water was full of leaves, and a long exposure revealed three small currents in the pool. I'm interested in any feedback you all might have.

Canon 5d Mark ii, 16-35mm f2.8 lens, 30 secs at f/16, ISO 50, Gitzo Tripod