Preprints
https://doi.org/10.5194/egusphere-2024-2690
https://doi.org/10.5194/egusphere-2024-2690
18 Sep 2024
 | 18 Sep 2024
Status: this preprint is open for discussion.

Brief Communication: Mimicking periglacial landforms and processes in an ice-rich layered permafrost system with polydispersed melamine materials: a new concept

Emmanuel Léger, François Costard, Rémi Lambert, Albane Saintenoy, Antoine Séjourné, and Maxime Leblanc

Abstract. This paper presents results on testing polydisperse melamine material versus sand for laboratory ice-rich layered soil system under thawing conditions. We demonstrate the potential of using polydisperse melamine particles in the aim of mimicking the permafrost geomorphological degradations and landslide found in periglacial field environments. We stress that this type of particles, designed for flow and sedimentary processes in river due to their light particle density and the granulometric size they span, are as well adequate for modeling more realistic geomorphological thawing features observed in cryosphere environments such as slump blocks.

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Emmanuel Léger, François Costard, Rémi Lambert, Albane Saintenoy, Antoine Séjourné, and Maxime Leblanc

Status: open (until 30 Oct 2024)

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Emmanuel Léger, François Costard, Rémi Lambert, Albane Saintenoy, Antoine Séjourné, and Maxime Leblanc
Emmanuel Léger, François Costard, Rémi Lambert, Albane Saintenoy, Antoine Séjourné, and Maxime Leblanc

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Short summary
This study explores the use of lightweight plastic particles for reproducing terrestrial geomorphological cryo-induced features at laboratory scale within permafrost/active layer thawing experiment. We show that, due to their small density and peculiar hydrodynamic parameters, these lightweight particles, originally designed for river sediment deposit and erosion are suitable for re-creating cryo-induced 3D geomorphological features found in terrestrial Retrogressive Thaw Slump.