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Chapitre D'ouvrage Année : 2022

Mass-Movement Types and Processes: Flow-Like Mass Movements, Debris Flows and Earth Flows

Résumé

Mass flows on hillslopes and steep channels are high gradient, subaerial mass movements of highly concentrated grain-in-fluid materials. They are generally initiated by liquefaction or erosion and bulking, and rapidly transform into non-Newtonian unsteady (surging) flows. Deposition or entrainment of material during flow may be very significant. Debris flows, most often observed in channels, consist of large clasts moving in a slurry of fine material in water, with boulders being carried at the front of large surges. Earth flows, most often observed on hillslopes, are generally large fine-grained long-lasting features that move slowly in response to rainfall and increased pore-water pressure. All kinds of mass flows can pose a significant threat to human lives and settlements.
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Dates et versions

hal-04430362 , version 1 (31-01-2024)

Identifiants

Citer

D. Laigle, E. Bardou. Mass-Movement Types and Processes: Flow-Like Mass Movements, Debris Flows and Earth Flows. Treatise on Geomorphology 2nd Edition, Elsevier, pp.61-84, 2022, ⟨10.1016/B978-0-12-818234-5.00152-8⟩. ⟨hal-04430362⟩
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