Deslizamientos Asociados a La Degradación Del Permafrost: Evidencias Geomorfológicas en El Pasado Y Presente en Los Andes Centrales (31º-34ºs)

Moreiras, Stella Maris; Jeanneret, Pilar; Lauro, C. di; Pont, Iván Pablo Vergara Dal; Gonzalez, Mariana Correas; Junquera-Torrado, Sebastián

doi:10.12957/geouerj.2019.45036

Cited by 2 publications

(4 citation statements)

References 19 publications

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“…From these inventories, the occurrence of DFs in high Andean altitudes dominated by a glacier environment has been ruled out [39,91,92] (Figure 5). However, those slopes located in lower positions related to periglacial domains where permafrost conditions could be affected by degradation take a key role [93][94][95]. [96]).…”

Section: Spatial Distributionmentioning

confidence: 99%

Debris Flows Occurrence in the Semiarid Central Andes under Climate Change Scenario

et al. 2021

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This review paper compiles research related to debris flows and hyperconcentrated flows in the central Andes (30°–33° S), updating the knowledge of these phenomena in this semiarid region. Continuous records of these phenomena are lacking through the Andean region; intense precipitations, sudden snowmelt, increased temperatures on high relief mountain areas, and permafrost degradation are related to violent flow discharges. Documented catastrophic consequences related to these geoclimatic events highlight the need to improve their understanding in order to prepare the Andean communities for this latent danger. An amplified impact is expected not only due to environmental changes potentially linked to climate change but also due to rising exposure linked to urban expansion toward more susceptible or unstable areas. This review highlights as well the need for the implementation of preventive measures to reduce the negative impacts and vulnerability of the Andean communities in the global warming context.

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Section: Spatial Distributionmentioning

confidence: 99%

Debris Flows Occurrence in the Semiarid Central Andes under Climate Change Scenario

et al. 2021

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“…The Central Andes (32-34 • S) experienced an intense activity of rainfall-induced landslides (RILs) associated with extreme hydrometeorological events [1][2][3]. In South America, RILs commonly affect communities socially and economically, limiting the development of populations in the mountain environment [4].…”

Section: Introductionmentioning

confidence: 99%

“…However, Ecuador and Chile have seen an increase in the rate of occurrence and damage caused to the population [30]. RIL events in the Central Andes stand out, increasing their frequency in the province of Mendoza, Argentina [2,4,31]. In Refs.…”

Section: Introductionmentioning

confidence: 99%

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Rainfall-Induced Landslide Assessment under Different Precipitation Thresholds Using Remote Sensing Data: A Central Andes Case

Maragaño-Carmona,

Fustos Toribio,

Descote

et al. 2023

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The determination of susceptibility to rainfall-induced landslides is crucial in developing a robust Landslide Early Warning System (LEWS). With the potential uncertainty of susceptibility changes in mountain environments due to different precipitation thresholds related to climate change, it becomes important to evaluate these changes. In this study, we employed a machine learning approach (logistic models) to assess susceptibility changes to landslides in the Central Andes. We integrated geomorphological features such as slope and slope curvature, and precipitation data on different days before the landslide. We then split the data into a calibration and validation database in a 50/50% ratio, respectively. The results showed an area under the curve (AUC) performance of over 0.790, indicating the model’s capacity to represent prone-landslide changes based on geomorphological and precipitation antecedents. We further evaluated susceptibility changes using different precipitation scenarios by integrating Intensity/Duration/Frequency (IDF) products based on CHIRPS data. We concluded that this methodology could be implemented as a Rainfall-Induced Landslides Early Warning System (RILEWS) to forecast RIL occurrence zones and constrain precipitation thresholds. Our study estimates that half of the basin area in the study zone showed a 59% landslide probability for a return of two years at four hours. Given the extent and high population in the area, authorities must increase monitoring over unstable slopes or generate landslide early warning at an operational scale to improve risk management. We encourage decision-makers to focus on better understanding and analysing short-duration extreme events, and future urbanization and public infrastructure designs must consider RIL impact.

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Deslizamientos Asociados a La Degradación Del Permafrost: Evidencias Geomorfológicas en El Pasado Y Presente en Los Andes Centrales (31º-34ºs)

Cited by 2 publications

References 19 publications

Debris Flows Occurrence in the Semiarid Central Andes under Climate Change Scenario

Debris Flows Occurrence in the Semiarid Central Andes under Climate Change Scenario

Rainfall-Induced Landslide Assessment under Different Precipitation Thresholds Using Remote Sensing Data: A Central Andes Case

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