Caracterização dos Fluxos de Detritos (debris flows) na Bacia do Rio Santa Cruz, Paranaguá-PR, no evento metereológico de Março de 2011

The study of debris flow (Debris Flow) as well as other processes related to gravitational mass movements allow the understanding of the dynamics of evolution of the hillside. This study consists of an initial analysis of Debris Flow in the stream Santa Cruz, formed by the meeting of three river channels (the Tinguí streams, Meio and Cachoeira) in Paranaguá -PR, comprising an area of 16.39 km².The Debris Flow analysis is the interpretation of preferred areas of each process, in other words, in which portions will occur deposition, nucleation and transport of the material. The areas in the northeastern part of the basin have lower slopes (3-8%), and the areas near the amount of higher quotas group the higher slopes (20-45%). The preliminary mapping of the basin done before the field work, from satellite image Worldview1, with a spatial resolution of 0.6 meters, achieved in 5 / May / 2011 produced an inventory of landslides, that after the field and the interpretation field data and pre-built maps (hipsometria, slope, geological), enabled the definition of these areas. Thus, the data obtained so far make up the initial parameters of the research, in order to create conditions for the development of a sucetibilidade map.