Slide 60 of 66
Notes:
In this simulation a short period of disturbance of the vegetation cover reduced its shearing resistance to the point that channels in the hollows eroded through the vegetation cover. In the model, once the vegetation cover is breached, and so long as the erosion rate remains high, it is assumed that a coherent vegetation cover cannot reform, even if the original cause of the disturbance is no longer present. As a result of the disturbance, an eroding wall of badlands (brown color) progresses headward, eroding first the hollows and then extending out to erode the upland slopes. The blue color is alluvial pediment that forms as eroded sediment from the badland slopes is transported to the level of the main stream at the bottom of the illustration. Note that divide areas remain undissected until the wall of badlands gradually extends headward.
