Before revision: In physical geography, a channel is a type of landform consisting of the outline of a path of relatively shallow and narrow body of water or of other fluids (e.g., lava), most commonly the confine of a river, river delta or strait.
After revision: In physical geography, a channel is a type of landform consisting of the outline of a path of relatively shallow and narrow body of water , most commonly the confine of a river, river delta or strait.