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Landslide susceptibility assessment using different rainfall event-based landslide inventories: advantages and limitations
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Orientador(es)
Resumo(s)
The present work aims to evaluate potential sources of uncertainty associated with rainfalltriggered event-based landslide inventories within the framework of landslide susceptibility
assessment. Therefore, this study addresses the following questions: (i) How representative
is an event-based landslide inventory map of the total landslide activity and distribution
in a study area?; (ii) How reliable is an event-based landslide susceptibility map?; (iii)
How appropriate is an event-based landslide inventory map for independently validating
a landslide susceptibility map? To address these questions, two independent and contrasting rainfall event-based landslide inventories were used, together with a historical landslide inventory, to assess landslide susceptibility for diferent types of landslides in a study
area located north of Lisbon, Portugal. The results revealed the following fndings: (i) contrasting rainfall critical conditions for failure can trigger similar landslide types, although
they may vary in size and be spatially constrained by diferent predisposing conditions,
particularly lithology and soil type; (ii) landslide susceptibility models using event-based
landslide inventories are not reliable in the study area, regardless of the landslide inventory map used for training and validation; and (iii) complementary sources of uncertainty
results from using incomplete historical landslide inventories to assess landslide susceptibility and non-totally independent landslide inventories for modeling validation. The present study enhances the understanding of regional landslide susceptibility patterns based
on contrasting rainfall-trigger conditions, providing valuable information to minimize
exposure; to design regional landslide early warning systems for specifc rainfall-trigger
landslide events; and to improve the response and preparedness of civil protection services.
Descrição
Palavras-chave
Landslides Event-based landslide inventories Short intense and long-lasting rainfall events Landslide susceptibility assessment
Contexto Educativo
Citação
Oliveira, S.C., Zêzere, J.L., Garcia, R.A.C., Pereira, S., Vaz, T., & Melo, R. (2024). Landslide susceptibility assessment using different rainfall event-based landslide inventories: advantages and limitations. Natural Hazards, 120(10), 9361–9399. https://doi.org/10.1007/s11069-024-06691-1
Editora
Springer