Vegetation succession progressively limits surface processes (sheet wash and concentrated overland flow) over time, whereas slopes affected by mass wasting processes increase in number. Results showed that the soil has changed over a period of 50 years with respect to soil properties, vegetation cover and rooting, which is reflected in the activity of geomorphological processes. At a more detailed scale, vegetation cover, soil properties and rooting effects on soil strength were determined. The study was carried out at two scales at the catchment scale long-term evolution of land-use, vegetation succession and slope failure processes were investigated. The bench-terraced slopes have been abandoned progressively over the last 50 years and show various stages of revegetation. The study was carried out in the Alcoy basin in SE Spain, where the marl substratum is prone to landsliding along steep ravines. The influence of vegetation succession on soil properties over time, as well as how developing root systems affect soil reinforcement was determined. In this case study, the role of vegetation succession and landslide activity on steep abandoned slopes was investigated. The effect of land abandonment as a result of changing land-use policies is becoming more and more important throughout Europe.
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