Slide 19 of 66
Notes:
As the relief of landscapes increases (due to rock resistance, higher uplift rates, or differences in climate). Hollows may be periodically flushed by landslides. This simulation by Tucker and Bras (1998, op. Cit) uses the model of shallow steady state groundwater flow and slope stability under surface-parallel flow of Montgomery and Dietrich (Montgomery, D.R. and Dietrich, W.E, 1994, A physically based model for the topographic control on shallow landsliding, Water Resour. Res., 30, 1153-1171) to predict which portions of the landscape become unstable. This usually occurs in the colluvial hollows. This model deposits the material downslope when gradients diminish sufficiently that the material is stable. The model does not include bedrock and colluvial erosion from debris flows that might be mobilized by the landslides which travel down the tips of the channel network in many high relief terrains.
