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- W2020768437 abstract "Abstract We use numerical two-dimensional discrete element method (DEM) to study the controls on the size and geometry of an individual landslide. This method allows us to analyze the temporal and spatial evolution of slope failure and landsliding from the intact, pre-failure slope to the restabilized, post-failure slope. The size of our simulated landslides reflects the amount of disintegrated material available for sliding, which is controlled by the peak strength of the slope material and to a lesser degree by the pre-failure slope angle. The observed size of natural landslides, therefore, reflects mainly the local natural material strengths. We hypothesize that the observed global characteristic landslide size is a result of the limited thickness (generally up to a few meters) of disintegrated and weathered material that exists on hillslopes, poised and ready for sliding. The primary controls on the landslide geometry, quantified as the ratio of their thickness to length t/l, prove to be the residual friction angle of the slope material and the original slope angle. The t/l is observed to be unchanged for a given initial slope angle and independent of the slope material peak strength or the slope height. We suggest that the narrow range of observed natural t/l is a result of narrow ranges of mechanical properties and initial slope geometries involved in natural slope failure." @default.
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- W2020768437 date "2014-09-01" @default.
- W2020768437 modified "2023-10-01" @default.
- W2020768437 title "Controls on the size and geometry of landslides: Insights from discrete element numerical simulations" @default.
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- W2020768437 doi "https://doi.org/10.1016/j.geomorph.2014.05.021" @default.
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