Abstract
Landslide susceptibility studies are a common type of landslide assessment. Landslides are one of the most frequent hazards in Brazil, resulting in significant economic and social losses (e.g., deaths, injuries, and property destruction). This paper presents a literature review of susceptibility mapping studies in Brazil and analyzes the methods and input data commonly used. The publications used in this analysis were extracted from the Web of Science platform. We considered the following aspects: location of study areas, year and where the study was published, methods, thematic variables, source of the landslide inventory, and validation methods. The susceptibility studies are concentrated in Brazil’s south and southeast region, with the number of publications increasing since 2015. The methods commonly used are slope stability and statistical models. Validation was performed based on receiver operating characteristic (ROC) curves and area under the curve (AUC). Even though landslide inventories constitute the most critical input data for susceptibility mapping, the criteria used for the creation of landslide inventories are not evident in most cases. The included studies apply various validation techniques, but evaluations with potential users and information on the practical applicability of the results are largely missing.
Highlights
Natural hazards are frequent in Brazil, and landslides are considered one of the most common hazards in the country [1,2,3]
This literature review and analysis enabled us to understand and identify the methods and input data commonly used for landslide susceptibility mapping in Brazil
The results revealed a considerable heterogeneity of methods, thematic variables, the origins of the landslide inventories used, and the validation methods used to assess the final susceptibility maps
Summary
Natural hazards are frequent in Brazil, and landslides are considered one of the most common hazards in the country [1,2,3]. They are responsible for causing losses almost every year, resulting in many economic and social problems. Most of rainfall-triggered fatal landslide events in South America are concentrated in Brazil (37%) [4]. Several high-magnitude events have occurred in the country in the last few decades, most in the south and southeast region [2]. All high-magnitude events were triggered by rainfall and resulted in fatalities and infrastructure damage
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