Comparative analysis of urban sprawl in Brazilian urban agglomerations: theorethical and methodological issues for urban and environmental planning / Analise comparativa da dispersão urbana nas aglomerações urbanas brasileiras : elementos teoricos e metodologicos para o planejamento urbano e ambiental

Ricardo Ojima

The association between urbanization and environmental degradation is commonplace in the demographic and sociological literature, especially in the debates on the relations among urban population growth, scarcity of resources, pollution and quality of life. Recent changes in population distribution patterns in Brazil s principie urban agglomerations lead to a new scenario in which the reduction of population growth rates is associated with a new pattern of land use, modifying intraurban dynamics and the related environmental impacts of urban expansion. A dispersed and fragmented pattern of urbanization - a consequence of structural changes in society and of new forms of spatial mobility - gains force. The thesis seeks to elaborate an index of urban dispersion, starting from a comparative analysis of Brazilian urbanization. The goal is to further our understanding of the challenges for sustainable urbanization. This objective required both theoretical and methodological investments in the search for evidence which could confirm the theoretical proposal of a new stage of the development of the modern society and the challenges for the environmental question in urban contexts. The index which was developed considered four social and spatial dimensions in order to com pose a synthetic index of urban dispersion for Brazilian urban agglomerations: Density, Fragmentation, Linearity and Centrality. Results are compatible with the evidence presented in the international literature and suggest new contours for the center-periphery dichotomy.

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