Well-vegetated streams tend to be narrow
  and deep due to the binding nature of
  plants and their root systems.

---

  Where vegetation has been removed by
  heavy grazing, logging or floodplain
  development, the cohesive nature of
  streambanks breaks down and the
  stream becomes wide and shallow.

                  Diverse, healthy vegetation has a major
                  influence on stream channel shape and
                  size.

13