Mapeamento digital para indicação preliminar de áreas suscetíveis a desastres mistos

Abstract

In many Brazilian cities, the town hall lack an organized cartographic base and specialized human resources for a digital mapping elaboration as a support for the management and planning of mixed disasters propitious areas. This article presents the research to generate a digital base of cartographic data as a support to the identification of mixed disasters susceptible areas, as well as urban planning and management support. The challenge was the use of multiscale and spacial multiresolutions cartographic documents available in public agencies to generate thematic maps and analyzes of flooding and erosion susceptible areas in the city of São João delRei, located in the state of Minas Gerais. The adopted theoretical and methodological basis was the General Theory of Systems applied to Geography, and procedures included the thematic maps generation, the urban area spatial- temporal mapping, mapping superposition, collection and analysis of primary and secondary data. The results indicated consolidation and urban expansion for susceptible flooding and erosion areas. The mapping and joint analysis of primary and secondary data were adequate and inexpensive to indicate mixed disasters susceptibilities urban site, in already consolidated areas and in expansion process areas.