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This paper has objective to analyze safety factor (FS) of slope stability, in view of landslide process occurrence in the studied area. The predictive model uses the deterministic method, supported limit equilibrium model. The study area is the Jacarei river basin, located at Morretes/PR and Paranagua/PR, witch strands are located at Serra do Mar Paranaense. The choice for this region is justifi ed for it’s representativity and for that it was affected by severe landslides occurred on march’s 11, 2011, which occasioned several damages and losses to the local community. Therefore, using the FS modeling with, the soil physical and mechanical proprieties, vegetation coverage and relief forms, integrated on a geographic information system (GIS), a landslide susceptibility and instability/stability grades map using FS values was prepared. The model validation was done by using landslide scars mapping, based on a high resolution WordView1 image, taken after the event, and compared with the predictive map. The model was prepared using saturated strands values, consistent with the hydrological situation on the day of the event. It was found that the classes with FS values of less than 1.25, which express very high susceptibility to landslides processes coincided 81% with the scars mapped. When considering the FS less than 1.50, which featuring high susceptibility to records, the predictive model coincided with 92% of scars. Therefore, the study demonstrated that the FS associated with modeling GIS tools have great potential for mapping susceptibility landslides on slopes of the Serra do Mar Paranaense.

ANÁLISE DO FATOR DE SEGURANÇA DA ESTABILIDADE DAS VERTENTES NA BACIA DO RIO JACAREÍ, SERRA DO MAR PARANAENSE