Multi-decadal dating of surface slope movements in forested DSGSD areas of the European Alps: detecting precipitation triggering factors

Leonelli, Giovanni; Chelli, Alessandro; Consonni, M.; Lorenzo, C.; Gattinoni, Paola

doi:10.1080/04353676.2020.1813983

Cited by 3 publications

(3 citation statements)

References 45 publications

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“…All growth series were visually and statistically crossdated [31] within trees and between trees in order to check the correct dating of each tree ring. Finally, the mean absolute annual eccentricity was calculated according to the following formula [16,18]: MAEI = |Ei| where:…”

Section: Case Study Of the Val Roncaglia Landslidementioning

confidence: 99%

“…• To assess the zone of the landslide area, by identifying its perimeter as well as the most active zones [14,15]; • To study the landslide reactivations though time, with annual resolution [12]; • To identify trigger events (i.e., by correlating the time series of anomalies with rainfall, earthquakes, or other events that may affect slope stability [16,17]).…”

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confidence: 99%

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Integrating Dendrogeomorphology into Stress–Strain Numerical Models: An Opportunity to Monitor Slope Dynamic

Curioni,

Gattinoni,

Leonelli

2024

Geosciences

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Monitoring systems are recognized worldwide as fundamental tools for landslide risk management. However, monitoring can be difficult when dealing with large slopes in forested areas. In these situations, dendrogeomorphology can offer a low-cost and low-impact alternative for providing distributed information with an annual temporal resolution. The present study is a first attempt to integrate dendrometric and dendrogeomorphic data into a numerical finite difference model, in order to simulate the stress–strain behavior of the tree-slope system. By using a parametrical approach, the capability of the numerical model to effectively reproduce the tree stem anomalies (i.e., tilting angle, J-shaped feature, and internal stresses causing tree-ring growth anomalies such as eccentric growth and reaction wood) was verified, and the target parameters for the model calibration were identified based on a sensitivity analysis, which emphasized the relevance of the wood deformability; moreover, the interpretation of results allowed to point out different peculiarities (in terms of type of deformation, falling direction, and distribution of internal stresses) for different slope conditions (kinematics and depth of the failure surface) and different zones of the landslide (head scarp, main body, and toe). Afterwards, the modeling approach was applied to the Val Roncaglia landslide (Northen Italy), which involves a complex roto-translational kinematics, characterized by multiple sliding surfaces. The simulated stem anomalies showed good agreement with the ones arising from onsite dendrometric surveys, and they confirmed the conceptual model of the landslide, enabling the planning of further specific investigations. Moreover, the capability of the model in reproducing the tilting angle of trees, if correlated to their eccentricity, could provide a quite long time series (over more than 50–60 years) of the landslide reactivation and allow the use of dendrochronological data for the model calibration, thereby enhancing slope dynamic monitoring and landslide risk management.

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Section: Case Study Of the Val Roncaglia Landslidementioning

confidence: 99%

mentioning

confidence: 99%

Integrating Dendrogeomorphology into Stress–Strain Numerical Models: An Opportunity to Monitor Slope Dynamic

Curioni,

Gattinoni,

Leonelli

2024

Geosciences

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“…Even though there are several examples of dendrogeomorphological analyses on generic landslides (Šilhán 2020) that study tree features such as annual ring width, trunk eccentricity, reaction wood, traumatic resin ducts, and root exposure (Stoffel and Corona 2014), only a few are closely related to DSGSDs (e.g. Fantucci and Sorriso Valvo 1999;Guida et al 2008;Pelfini and Santilli 2008;Van Den Eeckhaut et al 2009;Leonelli et al 2021). Bollati et al (2019b) focused on analyses at the border of a DSGSD, studying the erosion rates along the deep gullies developing along the DSGSD edges through dendrogeomorphological techniques, emphasising the ecological support role of geosites represented by such landforms.…”

Section: Deep-seated Gravitational Slope Deformations As Complex Geos...mentioning

confidence: 99%

How Can a Complex Geosite Be Enhanced? A Landscape-Scale Approach to the Deep-Seated Gravitational Slope Deformation of Pointe Leysser (Aosta Valley, NW Italy)

et al. 2022

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Complex geosites represent important georesources as components of the geoheritage of a region. Regardless, their management in terms of promotion and geoconservation may be challenging. Among others, gravity-related landforms can be considered complex geomorphological features and are often neglected in the geosite inventories, even if their dynamic and related educational exemplarity, multiscalarity and aesthetic value are relevant and make them potentially complex geosites. The aim of this research is to discuss the possible approaches to a potential complex geosite in the Western Italian Alps. The area is characterised by an articulated and geodiverse set of landforms that concur to define a multifaceted geological and geomorphological setting due to the presence of one of the most significant gravity-related geofeatures of the Italian Alps: the Pointe Leysser deep-seated gravitational slope deformation. The entire context, as well as each single geological/geomorphological feature, will be presented and described enhancing and quantifying their geoheritage values (i.e. scientific value, additional value, the potential for use). Finally, proposals for virtual or field approaches will be discussed, considering the limitations and advantages of dealing with a complex geosite. The suggested strategies assume an important role with respect to both the promotion and geoconservation of complex geosites.

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Understanding hydrometeorological triggers of natural hazards through dendrogeomorphology: Methods, limitations, and challenges

Tichavský

2023

Earth-Science Reviews

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Multi-decadal dating of surface slope movements in forested DSGSD areas of the European Alps: detecting precipitation triggering factors

Cited by 3 publications

References 45 publications

Integrating Dendrogeomorphology into Stress–Strain Numerical Models: An Opportunity to Monitor Slope Dynamic

Integrating Dendrogeomorphology into Stress–Strain Numerical Models: An Opportunity to Monitor Slope Dynamic

How Can a Complex Geosite Be Enhanced? A Landscape-Scale Approach to the Deep-Seated Gravitational Slope Deformation of Pointe Leysser (Aosta Valley, NW Italy)

Understanding hydrometeorological triggers of natural hazards through dendrogeomorphology: Methods, limitations, and challenges

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