Rock-Mantled Slopes

A detachment‐limited model of drainage basin evolution

“…Conventional treatment of hillslope runoff divides the flow and sediment transport into unconcentrated (interrill, overland, sheetwash) and channelized (fill) modes (see review by Abrahams et al [1994] , reemerging into the exposed rill network. On exposed sandy slopes, such as agricultural fields, erosion by unconcentrated flow may be appreciable, although the observations from experimental plots exaggerate overland flow erosion because of unnatural initial conditions (a smoothed rather than the rilled surface that would often evolve if left to natural processes).…”

“…In addition, a considerable proportion of the water erosion may be due to rain splash, which is a diffusive process [Ahnert, 1976;Kirkby, 1976bKirkby, , 1987Dunne and Aubrey, 1986] and may be included under the mass wasting mathematical modeling. Even where overland flow occurs, it is generally not uniform but concentrated into shallow channels lacking well-defined banks [Abrahams et al, 1994]. This model assumes that runoff erosion occurs only in channelized flow.…”

Spatial and process-based modeling of soil inorganic carbon storage in an arid piedmont

“…Runoff generation is a threshold process governed by infiltration rate in desert soils (Abrahams et al, 1994). The precipitation threshold, Ω, is introduced here as the quantity of precipitation (number of standard deviations above the mean daily precipitation) needed to initiate infiltration-excess runon/runoff processes on the landscape and is treated as a fitting parameter in the model.…”

Process–form relationships in Southern Italian badlands: erosion rates and implications for landform evolution

“…The lack of a relationship may be interpreted as reflecting the dominance of diffusive processes over advective ones for these landforms (Roering et al, 1999). However, surface runoff in the form of thin films is likely to be important for transporting both material that has been detached and transported a short distance by splash, and material that has been dislodged by raindrop impact (Parsons and Abrahams, 1992;Abrahams et al, 1994).…”