Analytic hierarchy process applied to landslide susceptibility mapping of the North Branch of Argentino Lake, Argentina

Silvana Moragues (), María Gabriela Lenzano, Mario Lanfri, Stella Moreiras, Esteban Lannutti and Luis Lenzano
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Silvana Moragues: Glaciología y Ciencias Ambientales (IANIGLA)-Centro Científico Tecnológico (CCT)
María Gabriela Lenzano: Glaciología y Ciencias Ambientales (IANIGLA)-Centro Científico Tecnológico (CCT)
Mario Lanfri: Consultoría en Alerta y Respuesta Temprana a Emergencias (CAEARTE), Comisión Nacional de Actividades Espaciales (CONAE)
Stella Moreiras: Glaciología y Ciencias Ambientales (IANIGLA)-Centro Científico Tecnológico (CCT)
Esteban Lannutti: Glaciología y Ciencias Ambientales (IANIGLA)-Centro Científico Tecnológico (CCT)
Luis Lenzano: Glaciología y Ciencias Ambientales (IANIGLA)-Centro Científico Tecnológico (CCT)

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2021, vol. 105, issue 1, No 42, 915-941

Abstract: Abstract In the present study, we achieved the susceptibility mapping to slope instability processes by the implementation of Analytic Hierarchy Process and Weighted Linear Combination methods, in the North Branch of Argentino Lake, Southern Patagonian Icefield. The strong retraction of the glaciers in the area has triggered paraglacial readjustments, producing instability processes that favor the generation of mass removal processes. The results obtained from optical satellite images show that the highest degrees of susceptibility (4 and 5) are located on the western slopes of the Upsala Channel, Bertacchi and Cono Tributary Glaciers, and the Moyano and Norte Valleys, respectively. These slopes coincide with the geographic location of previous events surveyed by the inventory of unstable areas of the zone. Low degrees of susceptibility are found on the downhill valleys, outcrops rock and glaciers. The Consistency Ratio was 0.069, indicating that being less than 0.1 the study is reliable. The study sheds light on the knowledge of slopes and valleys that are more susceptible to processes of instability in mountainous areas, which would make it possible to prevent possible hazards associated with these events.

Keywords: Analytic hierarchy process (AHP); Weighted linear combination (WLC); Susceptibility mapping; Slope instability process; North Branch of Argentino Lake (SPI) (search for similar items in EconPapers)
Date: 2021
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Citations: View citations in EconPapers (7)

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DOI: 10.1007/s11069-020-04343-8

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