Landslides triggered in weathered crystalline rocks of moderate latitudes: A case study in Mediterranean environment (The Maures Massif, France)

Thiéry, Yannick; Lacquement, Frédéric; Marçot, Nathalie

doi:10.1016/j.enggeo.2018.12.002

Cited by 10 publications

(5 citation statements)

References 58 publications

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“…Les calculs sont réalisés en 2D, 2,5D parfois en 3D pour un rendu cartographique 2D (Mergili et al, 2014 ;Dang et al, 2016). Elles reposent pour la majorité sur des modèles de pentes infinies, plus rarement sur des modèles de rupture complexe (Thiery et al, 2017a(Thiery et al, , 2019. Pour les deux approches, les facteurs de déclenchement (précipitations, niveau de saturation des matériaux, accélération sismique) sont pris en compte.…”

Section: Méthodes Quantitativesunclassified

“…Toutefois, au regard du grand nombre d'informations requises, elles ne sont appliquées que sur des petits bassinversants ou sur un phénomène particulier, ce qui les rend difficilement transposables. En effet, une certaine généralisation des données d'entrée demanderait des approximations engendrant des imprécisions des résultats (Zizioli et al, 2013 ;Thiery et al, 2019). Enfin, leur paramétrisation peut s'avérer complexe pour les non-initiés.…”

Section: Méthodes Quantitativesunclassified

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Évaluation de l’aléa glissements de terrain : état de l’art et perspectives pour la cartographie réglementaire en France

Thiéry

Terrier

2018

Rev. Fr. Geotech.

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En France, dans le cadre de la cartographie réglementaire (type PPR – plans de prévention des risques), l’évaluation de l’aléa glissements de terrain suit généralement une approche empirique. Outre les données de base disponibles, les résultats sont donc étroitement dépendants de la qualité d’expertise réalisée. Depuis quelques années, dans un but opérationnel et afin de réduire les incertitudes de l’évaluation de l’aléa, des approches parallèles ou complémentaires ont été développées. Dans le cadre de cette article, un état de l’art sur l’approche cartographique actuelle est tracé, puis les perspectives et limites des approches en cours de développement sont décrites.

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Section: Méthodes Quantitativesunclassified

Évaluation de l’aléa glissements de terrain : état de l’art et perspectives pour la cartographie réglementaire en France

Thiéry

Terrier

2018

Rev. Fr. Geotech.

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“…-to better understand the major geological characteristics of soil and subsoil within the area of interest (e.g., stratigraphy, lithology, structural elements, geotechnical and hydrogeological properties, etc. ), with several applications, such as the assessment of potential georesources [Gourcerol et al, 2019;Gloaguen et al, 2020], and evaluation of geological stability at specific sites [Perrin et al, 2015] as well as groundwater resource monitoring [Vergnes et al, 2020]; -to identify the main factors that have driven the regional geological evolution of the study area in order to point out major active processes that may have implications for the society, e.g., in terms of geohazards [Thiery et al, 2019], with the purpose to develop mitigation plans.…”

Section: Introductionmentioning

confidence: 99%

Integrating geological data in Europe to foster multidisciplinary research

Urvois

Grellet

Lorenz

et al. 2022

Annals of Geophysics

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The European Plate Observing System (EPOS, www.epos-eu.org) is a multidisciplinary pan-European research infrastructure for solid Earth science. It integrates a series of domain-specific service hubs (Thematic Core Service, TCS) such as the Geological Information and Modelling, which provides access to data, data products and services on European boreholes, geological maps, mineral occurrences, mines and 3D models. TCS GIM services are hosted by a group of European Geological Surveys and a couple of national research organizations. This paper presents novel data discovery and integration, facilitated using borehole logging information with on-demand web services to produce 3D geological structures. This domain interoperability across EPOS was created for the purpose of research, but it is also highly relevant for the response to societal grand challenges such as natural hazards and climate change. European and international interoperability implementation frameworks are well described and used (e.g., INSPIRE, ISO, OGC, and IUGS/CGI). It can be difficult for data providers to deploy web services that support the full semantic data definition (e.g., OGC Complex Feature) to expose several millions of geological entities through web-enabled data portals as required by pan-European projects. The TCS GIM group implemented and innovatively extended two standardized descriptions, i.e. GeoSciML-Lite and EarthResourceML-Lite, with an important reuse of content from Linked Data Registries. This approach was applied to design and implement the European Borehole Index and associated web services (View-WMS and Discovery-WFS), extended to 3D models, geological maps as well as mineral occurrences and mines. Results presented here apply the Linked Data approach ensuring optimal semantic description and enriching the data graphs, with complex descriptions and contents. In this way, it is now possible to traverse from one Borehole Index instance to linked richer information such as the borehole geological log, groundwater levels, rock sample description, analyses, etc. All this detailed information is served following international interoperability standards (Observations & Measurements, GroundWaterML 2.0, GeoSciML4, amongst others).

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“…Previous studies have found that the landslide surfaces of granite landslides are mostly in the completely weathered zone with low shear strength, where the granite has been completely weathered into gravelly clay with poor engineering mechanical conditions (Sandeep et al, 2022). Under heavy rainfall, the soil mass softens, easily leading to slope instability (Ietto et al, 2016;Thiery et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Experimental study on disaster mechanism of completely weathered granite landslide induced by extreme rainfall

Liu

Yu²,

et al. 2022

Preprint

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With the increased frequency of extreme weather, landslides induced by extremely heavy rainfall pose a major threat to human lives and property safety. Taking the 7.23 Fanling landslide in Laoshan, Qingdao, a typical strongly weathered granite area, as an example, based on the similarity criterion, three groups of indoor model tests under different extreme rainfall conditions were conducted using a large landslide model test box. The rainfall infiltration responses under different rainfall intensities, deformation processes, and failure modes of the slope were analyzed. The inducing mechanism and rainfall disaster process of granite landslides induced by extreme rainfall in strongly weathered areas were summarized. The results showed that (1) a completely weathered granite landslide induced by rainfall had four stages, i.e., infiltration erosion, surface deformation, damage deepening, and overall instability, and the slope was characterized by "sheet slip". (2) With greater rainfall intensities, the rainfall infiltration rate was higher, the changes in soil pressure, pore water pressure, water content, and matrix suction were faster, and the hysteresis effect was weaker. (3) A certain spatial distribution pattern was observed between slope deformation/damage and rainfall infiltration, and the research results could provide references for landslide warning and treatment in strongly weathered granite areas.

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Landslides triggered in weathered crystalline rocks of moderate latitudes: A case study in Mediterranean environment (The Maures Massif, France)

Cited by 10 publications

References 58 publications

Évaluation de l’aléa glissements de terrain : état de l’art et perspectives pour la cartographie réglementaire en France

Évaluation de l’aléa glissements de terrain : état de l’art et perspectives pour la cartographie réglementaire en France

Integrating geological data in Europe to foster multidisciplinary research

Experimental study on disaster mechanism of completely weathered granite landslide induced by extreme rainfall

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