The rules of composition aren't always hard and fast, but as Tracey says they are guides that help make your pictures more appealing and draw the eyes to the part of picture you want the viewer to notice...
One thing I do notice, especially when looking at the crop
@Blacktop made, is that none of the shot is sharp - The water is intentional, but the trees and the leafs in the water are all blurred. This type of shot with a slow shutter speed really does need a tripod, and even then, the trees can still be blurred as the slightest breeze will move the branches and leafs, but even then the trunk should still be sharp. If you get the static objects pin sharp, that will enhance the appearance of movement in the water which what the shot is all about.