A avaliação da suscetibilidade a escorregamentos vem sendo amplamente discutida na literatura. Entretanto, no Brasil, ainda são escassas pesquisas que diferenciam as zonas de ruptura, transporte e deposição decorrentes destes processos. Dessa forma, o objetivo central deste trabalho foi identificar as zonas de transporte e de deposição (runout) dos escorregamentos rasos na Serra do Mar, e sua correlação com a morfologia das encostas. Foi selecionada uma bacia hidrográfica, amplamente afetada por escorregamentos rasos, no município de Itaoca (SP), em janeiro de 2014, onde foram analisados, conjuntamente, o inventário de cicatrizes e dois parâmetros morfológicos (ângulo e curvatura da encosta), identificando-se, portanto, limiares entre as zonas de ruptura e transporte/deposição. Os resultados indicaram um maior volume do material transportado em 2014 e uma maior quantidade de zonas potencialmente deposicionais em eventos futuros. Esta avaliação permitiu um maior detalhamento da trajetória dos sedimentos a partir da ruptura, que pode ser usada como instrumento em áreas suscetíveis e densamente ocupadas.
<p>The Serra do Mar in Brazil is a geological-geomorphological compartment that is frequently affected by isolated or generalized events of different types of mass movements, especially shallow landslides. These events usually cause several social, economic and environmental damages, when they affect the municipalities of the region, as was the case of the municipality of Ita&#243;ca, where hundreds of landslides were triggered after heavy rains in January 2014. Thus, the objective of this work was to to evaluate the frequency and morphometric parameters of landslides that occurred in the Gurutuba river basin in the municipality of Itaoca. For this, the methodologies adopted consisted in the elaboration of an inventory of scars from RapidEye images with 5m resolution, which covered the entire extension of the scar, in the geomorphic characterization of the area, through the morphometric parameters of angle and curvature, derived from the Digital Terrain Model TanDem-X (12m). The results indicated that the Gurutuba river basin, with an extension of 25.4km&#178;, had about 12% of its area affected by landslides, which totaled 918 scars, with an average dimension of 3215 m&#178;. In addition, it was also possible to observe that the slips were more frequent in the angle classes from 20&#176; to 25&#176; (28%) and from 25&#176; to 30&#176; (22%), in the concave curvature (66%), and that if concentrated in the middle and upper third of the basin. These initial data are extremely important as they will serve to assess the transport and deposition dynamics of these landslides and to refine the scar inventory, indicating which sectors of the scar correspond to rupture, transport and sediment deposition.</p>
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