Physical parameters and landslide risk analysis: municipality of Crato (CE)
Abstract
According to estimates by the Brazilian Institute of Geography and Statistics (IBGE, 2018), approximately 8.3 million people reside in risk-prone areas across 872 municipalities in Brazil. The municipality of Crato, located in the state of Ceará, despite being situated in a relatively stable environmental setting, faces persistent challenges linked to unregulated land occupation and the absence of urban planning aligned with environmental protection—particularly on the slopes of the Chapada do Araripe. This study seeks to examine the physical parameters that condition susceptibility in the Chapada do Araripe region, as well as to delineate risk sectors within the Seminário neighborhood, considering the marked contrasts between high-income zones and areas inhabited by low-income populations. Topographic maps and geospatial analysis techniques were employed to identify susceptible zones within the study area. The results indicate that susceptibility is predominantly associated with elevated altitudes, steep slopes, and the presence of rocky escarpments. In the Seminário neighborhood, slopes exceeding 16.8°, the presence of scars from translational landslides, and exposed soil surfaces constitute a scenario of heightened landslide risk. The findings of this research are essential to support the formulation of public policies focused on disaster risk reduction and sustainable urban development in Crato.
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