Earth surface processes ; Forecast ; Glaciology ; Ice sheet ; Methodology ; Model ; Numerical model ; Spatial variation ; Time
Advances in the understanding of physical principles underlying geophysical processes have enabled to develop complex numerical models of landscape evolution. This paper uses examples from glaciology that highlight the need for a balanced approach
incorporating both immanent and configurational approaches. The key is that it is possible to explain and understand long-term processes without necessarily being able to predict them with numerical models.
Diffusion in landscape development models: on the nature of basic transport relations
Glissement de terrain ; Géomorphodynamique ; Modèle ; Modèle de diffusion ; Mouvement de masse ; Méthodologie ; Reptation ; Versant
Creep ; Diffusion model ; Earth surface processes ; Landslide ; Mass movement ; Methodology ; Model ; Slope
In constructing large-scale landscape development models, processes must be appropriately represented over extended scales of space and time. Suitable methods must be found for the generalization of processes that capture the essential character
of landscapes as they evolve. The diffusion equation was introduced into geomorphological reasoning for this purpose. Diffusivities estimated in this study are compared with values derived in scarp studies and values adopted in landscape development models
Badland ; Erosion rate ; Geomorphometry ; Model ; Quaternary ; Simulation ; Soil erosion ; Splash ; United States of America ; Utah ; Watershed ; Wisconsinan
A drainage basin simulation model is used to interpret the morphometry and historical evolution of Mancos Shale badlands in Utah. Field relationships and simulation modelling indicate that the badlands have resulted from rapid downcutting
in dominant process regime, from fluvial to glacial erosion, is described. Then, the time-scale of change is evaluated. Finally, observations are related to the hypothesized relief development implicit in existing tectonic-isostatic models of alpine uplift.