Examples of landslide dams and their stability in the Blanco River basin. Central Andes, San Juan Argentina

Angillieri, María Yanina Esper; Villarroel, Cristian Daniel; Ocaña, Raúl Emmanuel; Forte, Ana Paula

doi:10.1016/j.jsames.2022.103946

Cited by 3 publications

(1 citation statement)

References 59 publications

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“…The Maipo basin is located in the Central Andes (33 • S/70 • W) (Figure 1). The zone has high summits and extensive valleys resulting from the action of different climate controls, particularly glacial and erosional processes related to the Andes Mountains rivers [36,37]. The zone presents uneven terrain, which exposes geological processes like kilometres-long deformations and faulting, volcanism, zones with hydrothermal alteration and geothermal centres.…”

Section: Study Zonementioning

confidence: 99%

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

Maragaño-Carmona,

Fustos Toribio,

Descote

et al. 2023

Water

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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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Section: Study Zonementioning

confidence: 99%

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

Maragaño-Carmona,

Fustos Toribio,

Descote

et al. 2023

Water

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Current understanding, knowledge gaps, and challenges of mountain permafrost research in the Chilean and Argentinean Andes

Fernández-Navarro,

Tapia Baldis,

Rojas

et al. 2024

Journal of South American Earth Sciences

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A state-of-the-art review of normal and extreme flow interaction with spur dikes and its failure mechanism

Nandhini,

Murali,

Harish

et al. 2024

Physics of Fluids

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River protection structures, especially spur dikes, play a vital role in the hydrodynamic and morphological changes in a river system. Since the earliest days, numerous studies have been carried out to understand the flow characteristics around spur dikes by varying the spacing between them, the length, the shape, the permeability, and the submergence. Despite several studies, knowledge of flow characteristics around spur dikes is still poorly understood, resulting in damages and failures worldwide. Furthermore, such failures get aggravated under extreme conditions like floods, land-slide-induced surges and tidal bores. Therefore, this state-of-the-art review paper provides a comprehensive account of relevant studies on the flow interaction and its characteristics in the vicinity of spur dikes during normal and extreme scenarios. Possible failure mechanisms with a detailed examination of scour in the proximity of spur dikes are deliberated. Suitable design features and international standards of various types of spur dikes are appraised through this comprehensive review. Furthermore, we also identified a number of research gaps that need immediate attention. This review paper, as a whole, provides concrete knowledge of the flow interaction with spur dikes and design components of spur dikes, thereby helping researchers to understand the advancement in the research area and providing hydraulic engineers with guidance for designing the spur field at a specific site based on the requirements.

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Examples of landslide dams and their stability in the Blanco River basin. Central Andes, San Juan Argentina

Cited by 3 publications

References 59 publications

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

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

Current understanding, knowledge gaps, and challenges of mountain permafrost research in the Chilean and Argentinean Andes

A state-of-the-art review of normal and extreme flow interaction with spur dikes and its failure mechanism

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