Velocity is generally very fast, but channel is not well developed. Clearly the stream is only in collection and transportation mode. Only when velocity slows will deposition begin. Still in collection and transport mode, despite some temporary deposition when stream velocity slows. Oldest of the three.
Velocity is at equilibrium with channel width and depth.
Velocity is slower than in straight streams. In equilibrium until one of the discharge factors is changed. Find watersheds that are assessed low vulnerability and those with serious problems. Bonus points to those who tell me why the watersheds are in danger. Give at least one example of each.