The main hypothesis of this thesis is that the problem of urban sprawl, as a disorder in the growth of the cities, is not a natural result of the growth of the capitalist city but a phenomenon manipulated politically. Consequently, generally a geographically problematized phenomenon / the urban sprawl is, within this work, problematized with reference to urban politics. In the searching of the politics of urban sprawl, one of the political interventions into the urban space / the master plans has utmost importance in this work. The impact of the master plans on the sprawl of the city will be analyzed. A categorization of urban sprawl is proposed in the work, on the urban geography with reference to politics of urban sprawl. After illustrating the types of urban sprawl, the politics of urban sprawl is modeled. The political interventions of State, Metropolitan Municipality, District Municipalities, Housing Development Administration, Real Estate Agents and Rural Landowners located on the periphery is included in the model and their impact on the urban geography is evaluated. Ankara will be examined as a case in the politics of urban sprawl / her unique characteristics like being the &#039 / planned&#039 / capital city controlled by master plans make her indispensable to study. The political interventions of the actors to the urban space of Ankara is highly visible especially considering urban sprawl in the geography of the city, yet another reason to work on.

My research considers both the challenges to and opportunities for implementing Smart Growth strategies in the City of Guelph’s urban growth centre, with a particular focus on the St. Patrick’s Ward neighbourhood. I follow the development of the downtown secondary plan-making process, spanning the time period from March 2010 to June 2011, which includes public participation by residents in the St. Patrick’s Ward and the city at large. The plan-making process started prior to, and continues after, my chosen timeframe, but the information collected in my case study brings to light the complexity of drafting a secondary plan for implementing Smart Growth strategies; the plan should ideally establish a framework for local interpretation and implementation of Smart Growth – the widely supported intensification and redevelopment strategy. I take the view that while a plan can be written to code and be argued rationally by experts, its effectiveness and ethical validity is a function of public participation in planning decisions that include values-rational anchoring, i.e. critical and ethical reflection on the value of a goal. Although many guiding principles and recommendations in the draft Plan are based on Smart Growth strategies, the physical scale of urban intensification is today very much focused on density numbers under the Growth Plan for the Greater Golden Horseshoe. The City of Guelph’s draft Downtown Secondary Plan primarily seeks to facilitate high-density, mid- to high-rise condominium and/or office developments. This may in turn lead to increased spatial segregation based on socioeconomic differences. Like in Toronto, Guelph’s Downtown Secondary Plan deregulates zoning by-laws and reduces bureaucratic ‘red tape’ for the high-density development industry through more flexible policies. Potential socioeconomic consequences like displacement of entire populations, services, and jobs from the newly re-valued places are, however, not addressed in the Plan; the policy language and conceptual thinking appears primarily geared toward redevelopment and infill. The overall lesson learned from studying the plan-making process leading up to the City of Guelph’s 1st Draft Downtown Secondary Plan concerns the role of planning in implementing Smart Growth; being a specific form of urban planning, Smart Growth implementation requires facilitation and education of stakeholders who are willing to compromise, but not beyond the point where “smart” is removed from “growth”. Given the overarching responsibility of the government to drive home this message, every stakeholder working for the public interest must collaboratively define, steer, and direct the process and private interests at each and every step along the road. The case of Guelph demonstrates the difficulty of prioritizing such a responsibility. Thus, potential future pressures to push and undermine Smart Growth’s synergistic and public participatory core value must be monitored and controlled with long-term objectives in mind.

In the last 50 years, Mexico, like many other countries in Latin America, Asia and Africa, has experienced accelerated urban growth. Urban growth has been accompanied by an increase in urban poverty. While the spatial distribution of poverty in urban areas in Mexico is varied, new settlements that tend to grow in the peri-urban hinterland of cities are largely associated with poverty. This is because inexpensive, but mostly illegal, agricultural land (ejido or private) has been alienated to satisfy the demands of low income population for housing. The focus of this study lay in the Metropolitan Area of Mexico City (MAMC), which is the habitat of diverse low-income groups. Among those groups are the campesinos (people with rural background engaged totally or partially in agricultural livelihoods). Some studies have suggested that campesinos are very vulnerable to urban growth, since population expansion has put severe pressure on their agricultural land, which, despite its marginal value, is used to produce crops for either semi-commercialisation or subsistence. Although such research has showed how poor campesinos have engaged in non-agricultural activities to make a living and how land and their communities are threatened by urban growth due to speculative pressures on land and/or environmental deterioration, little is known about the impact of urban growth in the process of impoverishment of campesinos living in peri-urban areas. This study aims to understand how the growth of the MAMC affects poverty in campesinos’ households, in order to recommend directions for poverty reduction. Three villages in Chalco municipality, which is situated in the peri-urban fringe of Mexico City, were selected as the study area. Based on the development of a conceptual framework, this study considered three interconnected elements underpinning poverty: multi-dimensionality, complexity and dynamism. For this reason, the Sustainable Livelihoods approach was selected as an analytical tool, as it provided a flexible analytical framework that encompasses all those elements. The study is divided in three stages. In the first stage (namely documental investigation), a series of published and unpublished written materials were reviewed to determine how the growth of the MAMC transformed the nature and availability of resources in Chalco municipality from 1970 to 2000. This stage was followed by the empirical investigation that aimed to examine how those transformations affected campesinos’ assets (human, natural, physical, productive and social), the strategies they used to adapt to such changes, and how they perceived changes in poverty status. Accordingly, for this stage, quantitative and qualitative longitudinal and cross-sectional data were collected from 110 campesinos’ households living in the study area in 1997 and 2003 by using structured questionnaires. Qualitative data were also collected by using semi-structured interviews from 34 campesinos’ households in 2000. The final stage, called recommendations, involved the synthesis of the results of the documental and empirical investigations and suggests a series of directions for poverty reduction in campesinsos’ households in the study area. The documental and empirical investigations revealed that changes in asset ownership, between 1997 to 2003, depended on both transformation in the nature and availability of resources in Chalco and intra-household organization. Fundamental transformations in socio-demographic, economic, natural, physical and political/organisational resources of Chalco municipality were mainly, but not exclusively, associated with the growth of the MAMC. Climatic and physical characteristics of Chalco were also evident. To respond to such changes, campesinos implemented a series of strategies to get access to resources. Such strategies were based on campesinos’ needs, priorities and the portfolio of assets available, and their functionality. It was clear that campesinos depleted some existing assets to acquire urban assets and preserve their rural assets. In some instances, such strategies led campesinos’ families to satisfy their basic needs and, therefore, perceive themselves as non-poor. However, in other instances, such strategies prevented families from meeting their needs, leading them to the perception of being poor. The recommendation was made that in order to reduce poverty among campesinos in the study area, it was necessary to identify different alternatives to support their urban and rural assets and certain of their strategies that improve the wellbeing of individuals, families and communities and mitigate constraints to meeting their goals.

In the last 50 years, Mexico, like many other countries in Latin America, Asia and Africa, has experienced accelerated urban growth. Urban growth has been accompanied by an increase in urban poverty. While the spatial distribution of poverty in urban areas in Mexico is varied, new settlements that tend to grow in the peri-urban hinterland of cities are largely associated with poverty. This is because inexpensive, but mostly illegal, agricultural land (ejido or private) has been alienated to satisfy the demands of low income population for housing. The focus of this study lay in the Metropolitan Area of Mexico City (MAMC), which is the habitat of diverse low-income groups. Among those groups are the campesinos (people with rural background engaged totally or partially in agricultural livelihoods). Some studies have suggested that campesinos are very vulnerable to urban growth, since population expansion has put severe pressure on their agricultural land, which, despite its marginal value, is used to produce crops for either semi-commercialisation or subsistence. Although such research has showed how poor campesinos have engaged in non-agricultural activities to make a living and how land and their communities are threatened by urban growth due to speculative pressures on land and/or environmental deterioration, little is known about the impact of urban growth in the process of impoverishment of campesinos living in peri-urban areas. This study aims to understand how the growth of the MAMC affects poverty in campesinos’ households, in order to recommend directions for poverty reduction. Three villages in Chalco municipality, which is situated in the peri-urban fringe of Mexico City, were selected as the study area. Based on the development of a conceptual framework, this study considered three interconnected elements underpinning poverty: multi-dimensionality, complexity and dynamism. For this reason, the Sustainable Livelihoods approach was selected as an analytical tool, as it provided a flexible analytical framework that encompasses all those elements. The study is divided in three stages. In the first stage (namely documental investigation), a series of published and unpublished written materials were reviewed to determine how the growth of the MAMC transformed the nature and availability of resources in Chalco municipality from 1970 to 2000. This stage was followed by the empirical investigation that aimed to examine how those transformations affected campesinos’ assets (human, natural, physical, productive and social), the strategies they used to adapt to such changes, and how they perceived changes in poverty status. Accordingly, for this stage, quantitative and qualitative longitudinal and cross-sectional data were collected from 110 campesinos’ households living in the study area in 1997 and 2003 by using structured questionnaires. Qualitative data were also collected by using semi-structured interviews from 34 campesinos’ households in 2000. The final stage, called recommendations, involved the synthesis of the results of the documental and empirical investigations and suggests a series of directions for poverty reduction in campesinsos’ households in the study area. The documental and empirical investigations revealed that changes in asset ownership, between 1997 to 2003, depended on both transformation in the nature and availability of resources in Chalco and intra-household organization. Fundamental transformations in socio-demographic, economic, natural, physical and political/organisational resources of Chalco municipality were mainly, but not exclusively, associated with the growth of the MAMC. Climatic and physical characteristics of Chalco were also evident. To respond to such changes, campesinos implemented a series of strategies to get access to resources. Such strategies were based on campesinos’ needs, priorities and the portfolio of assets available, and their functionality. It was clear that campesinos depleted some existing assets to acquire urban assets and preserve their rural assets. In some instances, such strategies led campesinos’ families to satisfy their basic needs and, therefore, perceive themselves as non-poor. However, in other instances, such strategies prevented families from meeting their needs, leading them to the perception of being poor. The recommendation was made that in order to reduce poverty among campesinos in the study area, it was necessary to identify different alternatives to support their urban and rural assets and certain of their strategies that improve the wellbeing of individuals, families and communities and mitigate constraints to meeting their goals.

In the last 50 years, Mexico, like many other countries in Latin America, Asia and Africa, has experienced accelerated urban growth. Urban growth has been accompanied by an increase in urban poverty. While the spatial distribution of poverty in urban areas in Mexico is varied, new settlements that tend to grow in the peri-urban hinterland of cities are largely associated with poverty. This is because inexpensive, but mostly illegal, agricultural land (ejido or private) has been alienated to satisfy the demands of low income population for housing. The focus of this study lay in the Metropolitan Area of Mexico City (MAMC), which is the habitat of diverse low-income groups. Among those groups are the campesinos (people with rural background engaged totally or partially in agricultural livelihoods). Some studies have suggested that campesinos are very vulnerable to urban growth, since population expansion has put severe pressure on their agricultural land, which, despite its marginal value, is used to produce crops for either semi-commercialisation or subsistence. Although such research has showed how poor campesinos have engaged in non-agricultural activities to make a living and how land and their communities are threatened by urban growth due to speculative pressures on land and/or environmental deterioration, little is known about the impact of urban growth in the process of impoverishment of campesinos living in peri-urban areas. This study aims to understand how the growth of the MAMC affects poverty in campesinos’ households, in order to recommend directions for poverty reduction. Three villages in Chalco municipality, which is situated in the peri-urban fringe of Mexico City, were selected as the study area. Based on the development of a conceptual framework, this study considered three interconnected elements underpinning poverty: multi-dimensionality, complexity and dynamism. For this reason, the Sustainable Livelihoods approach was selected as an analytical tool, as it provided a flexible analytical framework that encompasses all those elements. The study is divided in three stages. In the first stage (namely documental investigation), a series of published and unpublished written materials were reviewed to determine how the growth of the MAMC transformed the nature and availability of resources in Chalco municipality from 1970 to 2000. This stage was followed by the empirical investigation that aimed to examine how those transformations affected campesinos’ assets (human, natural, physical, productive and social), the strategies they used to adapt to such changes, and how they perceived changes in poverty status. Accordingly, for this stage, quantitative and qualitative longitudinal and cross-sectional data were collected from 110 campesinos’ households living in the study area in 1997 and 2003 by using structured questionnaires. Qualitative data were also collected by using semi-structured interviews from 34 campesinos’ households in 2000. The final stage, called recommendations, involved the synthesis of the results of the documental and empirical investigations and suggests a series of directions for poverty reduction in campesinsos’ households in the study area. The documental and empirical investigations revealed that changes in asset ownership, between 1997 to 2003, depended on both transformation in the nature and availability of resources in Chalco and intra-household organization. Fundamental transformations in socio-demographic, economic, natural, physical and political/organisational resources of Chalco municipality were mainly, but not exclusively, associated with the growth of the MAMC. Climatic and physical characteristics of Chalco were also evident. To respond to such changes, campesinos implemented a series of strategies to get access to resources. Such strategies were based on campesinos’ needs, priorities and the portfolio of assets available, and their functionality. It was clear that campesinos depleted some existing assets to acquire urban assets and preserve their rural assets. In some instances, such strategies led campesinos’ families to satisfy their basic needs and, therefore, perceive themselves as non-poor. However, in other instances, such strategies prevented families from meeting their needs, leading them to the perception of being poor. The recommendation was made that in order to reduce poverty among campesinos in the study area, it was necessary to identify different alternatives to support their urban and rural assets and certain of their strategies that improve the wellbeing of individuals, families and communities and mitigate constraints to meeting their goals.

Dans cette thèse nous proposons et nous mettons en application plusieurs modèles décrivant la croissance et la morphologie du tissu urbain. Le premier de ces modèles est issu de la percolation en gradient (correlée) déjà proposé de la littérature. Le second, inédit, fait appel à un équation différentielle stochastique. Nos modèles sont paramétrables : les paramètres que nous avons choisi d’appliquer sont naturels et tiennent compte de l’accessibilité des sites. Le résultat des simulations est conforme à la réalité du terrain. Par ailleurs, nous étudions la percolation en gradient: nous démontrons , suivant Nolin, que la frontière de cluster principal se situe dans un voisinage de la courbe critique et nous estimons ses longueurs et largeurs. Enfin, nous menons une étude du processus de croissance SLE. Nous calculons (preuve assistée par ordinateur) l’espérance des carrés des modules pour SLE2 and SLE6. Ces résultats sont liés à la conjecture de Bieberbach. / In this thesis we propose and test models that describe the growth and morphology of cities. The first of these models is used from previously developed correlated gradient percolation model. The second model is related to a stochastic differential equation and has never been proposed before. Both models are parameterizable. The parameters we chose in applications are well justified by physical observations: proximily to axes and accessibility of sites. The result is consistent with actual data. We also study the gradient percolation as a mathematical object. We prove, following Nolin’s ideas, that the front of gradient percolation cluster is localised in a neighborhood of the critical curve with width and length depending on density gradient. Finally, we also study SLE growth processes. We calculate (computer assisted demonstration) the expected value of square of moduli for SLE2 and SLE6 related to the Bieberbach conjecture.

A população mundial aumenta a cada dia e, somado aos movimentos populacionais, a ocupação do território urbano tem crescido a taxas cada vez maiores. O Brasil segue a mesma tendência, já que quase dobrou sua população em pouco mais de trinta anos, essa se estabeleceu predominantemente nas cidades. O mundo está próximo de atingir níveis populacionais jamais imaginados e as pessoas estão migrando para os grandes centros urbanos, que crescem de forma descontrolada, causando impactos diversos, desde ambientais até relacionados ao bem-estar físico e mental de seus ocupantes. Como resultado, as cidades são os locais onde as maiores desigualdades sociais e impactos ao ambiente natural acontecem. Diante desse contexto, as estratégias de planejamento correntes estão fadadas ao fracasso, pois repetem estratégias utilizadas em séculos anteriores, e não estão preparadas para as demandas que surgem com o desenvolvimento humano e urbano do século XXI. Pesquisadores divergem sobre a forma de crescimento da cidade, são sugeridas soluções, que vão desde o controle do espalhamento da área urbana, incentivo à cidade compacta e até o incentivo à verticalização. Ao mesmo tempo, as cidades se espalham no território e verticalizam. A lacuna verificada foi determinada a partir da constatação da escassez de trabalhos que considerassem de forma sistêmica as características e os possíveis impactos de cada uma das formas de crescimento urbano, a falta de vinculação dessas informações aos princípios de desenvolvimento sustentável, tão preconizado, e a fragmentação dos temas relacionados ao desenvolvimento urbano sustentável. O entendimento sobre como as cidades crescem, e quais são os impactos das formas urbanas resultantes, e quais são as demandas para um crescimento sustentável pode se tornar a base para auxiliar os planejadores no processo de tomada de decisão. O desenvolvimento sustentável é um desafio a ser considerado nos ambientes consumidores, poluidores e opressores em que se transformaram as cidades. Este trabalho tem o objetivo de buscar um modelo conceitual para o planejamento sustentável do crescimento urbano. Por se tratar de uma proposta que procura atender uma demanda real, a melhoria nas práticas tradicionais de planejamento urbano, e contribuir com a construção do conhecimento sobre o assunto, através da organização das informações, foi adotada como estratégia a pesquisa construtiva. Para tanto, foi realizada na primeira etapa, de compreensão, ampla busca de referencial teórico para auxiliar na estruturação do trabalho. Na segunda etapa, na fase de desenvolvimento, foram propostos os resultados, organizados a partir de um modelo conceitual formado a partir de constructos relacionados ao crescimento urbano e ao planejamento urbano sustentável. O modelo foi complementado por uma sequência de etapas para a futura implementação em contextos reais (método). O modelo ainda foi avaliado por especialistas da área de sustentabilidade. Por fim, na etapa de reflexão foram definidos os avanços práticos, avanços teóricos, replicabilidade e possibilidades de pesquisas futuras. Através do desenvolvimento deste trabalho constatouse que, apesar da complexidade, é possível trabalhar de forma sistêmica com o planejamento do crescimento urbano, contemplando-se as metas para o desenvolvimento sustentável em todas as suas dimensões: social, econômica, ecológica, espacial e cultural. / The world population is increasing each day and, in addition to population movements, the occupation of urban territory has grown at rates ever higher. Brazil follows the same trend, almost doubled its population in little more than thirty years that has been established mainly in the cities. The world is approaching population levels never imagined before and people are migrating to the large urban centers, which grow in an uncontrolled manner, causing different impact, since environmental until related to physical and mental well-being of its occupants. As a result, cities are the places where the greatest social inequalities and impacts on the natural environment happen. In this context, the planning strategies are doomed to fail, because repeat strategies used in previous centuries, and are not prepared for the demands that arise with urban and human development of the 21st century. Researchers differ on the way to the city's growth, suggesting solutions, ranging from the control of the sprawl of the urban area, encouraging the compact city and until the incentive to vertical city. At the same time, the cities spread across the territory and get taller. The gap was determined from the observation of the scarcity of studies that consider in a systematic way the characteristics and the potential impacts of each of the forms of urban growth, the lack of binding of these information to the principles of sustainable development, as recommended, and the fragmentation of topics related to sustainable urban development. The understanding of how cities grow, what are the impacts of urban forms resulting from, and what are the demands for a sustainable growth can become the basis for helping the planners of the decision-making process. The sustainable development is a challenge that must be considered in consumer, polluters and oppressors environments that became the cities. This work has the objective to seek a conceptual model for the sustainable planning of urban growth. This is a proposal that seeks to meet a real demand, improving the traditional practices of urban planning, and contribute to the construction of knowledge on the subject, through the organization of the information, was adopted as a strategy the constructive research. For both, was performed in the first step, of understanding, broad search of theoretical framework to assist in structuring the work. In the second stage, the stage of development, were proposed results, organized from a conceptual model formed from constructs related to urban growth and urban planning sustainable. The model was complemented by a sequence of steps for the future implementation in real contexts (method). The model has been evaluated by experts in the area of sustainability. Finally, the reflection phase were defined the practical developments, theoretical advances, replicability and possibilities for future research. Through the development of this work it was found that, despite the complexity, it is possible to work in a systematic way with the planning of urban growth, contemplating the goals for sustainable development in all its dimensions: social, economic, ecological, spatial and cultural.

A urbanização modifica a superfície, promovendo a troca da cobertura natural por materiais de construção. As áreas urbanas, além do solo impermeável, têm a presença de edifícios, que alteram a rugosidade da superfície, a velocidade e a direção dos ventos e provocam o sombreamento da superfície, bloqueando a incidência da energia solar. Assim, analisar a geometria de ocupação da cidade é importante para o entendimento do clima urbano e para o planejamento da cidade. O sensoriamento remoto é uma importante forma de obtenção de informações das áreas urbanas, contudo é preciso considerar a heterogeneidade deste ambiente e a mistura espectral existente nos dados satelitais. Dessa forma, o modelo linear de mistura espectral apresenta-se como importante método de extração de informações dos ambientes urbanos. O objetivo deste trabalho é identificar áreas com padrão horizontal e com padrão vertical de ocupação urbana, em Porto Alegre, e relacionar essa característica geométrica com valores de temperatura de superfície. Para tanto, imagens do sensor TM do satélite Landsat 5, adquiridas entre 1984 e 2009 foram utilizadas, bem como dados censitários, dados meteorológicos e modelos gerados por varredura laser. A partir das imagens TM foram geradas três imagens fração: solo, sombra e vegetação. A fração solo foi utilizada na identificação de áreas de ocupação horizontal e de expansão urbana, e a fração sombra foi utilizada na identificação de áreas verticalizadas. Utilizando as mesmas imagens, obtiveram-se os valores de temperatura de superfície. As áreas com ocupação horizontal, caracterizadas por moradias em casas, apresentaram baixos valores de sombra e altos valores de solo. As áreas verticalizadas apresentaram altos valores de sombra e baixos valores de solo. Os resultados extraídos das imagens fração têm similaridade com dados de artigos científicos e com os dados da varredura laser. A temperatura de superfície, em Porto Alegre, mostrou forte correlação com dados meteorológicos, e se caracteriza por valores mais altos nas áreas urbanizadas e mais baixos onde a ocupação é rarefeita. Nas áreas urbanizadas, maiores valores de temperatura de superfície são encontrados nas regiões com padrão de ocupação horizontal, enquanto os menores valores são encontrados nas regiões verticalizadas. A metodologia escolhida gerou resultados compatíveis com outros dados de uso e ocupação do solo, provenientes de diferentes fontes, e contribui com características da área urbana e do clima urbano da cidade de Porto Alegre, informações essas escassas nos principais bancos de dados acadêmicos. / The urbanization modifies the landscape, promoting changes from natural to man-made environment. Besides the impermeable soil, the urban areas have a lot of buildings, that changes the surface roughness, the wind speed and direction and also are responsible for shading the surface, blocking the incidence of solar energy. Analysing the city occupation geometry is important to understanding of the urban climate behaviour, and naturally the city planning. Remote sensing is a very important tool to get information about the urban areas, but is necessary to consider the heterogeneity of this environment and the existing spectral mixing in satellite data. Based on this, the linear model of spectral mixing can be classified as an important method of information extraction from urban environments. The goal of this research is to identify areas with horizontal and vertical patterns of urban occupation in the city of Porto Alegre – Brazil and relate this geometric characteristic with values of surface temperature. Therefore, images of the TM sensor of the Landsat 5 satellite were used (during the 1984-2009 period) and also the census data, meteorological data and models generated by laser scanning. Three fraction images were generated based on TM images: soil, shade and vegetation. The soil fraction was used for the identification of the areas with horizontal occupation and urban expansion, and the shadow fraction was used to identify verticalized areas. Based on the same images the surface temperature was obtained. Areas with horizontal occupation, mostly represented by houses, presented low shading values and high soil values. On the other hand, verticalized areas presented high shading values and low soil values. These results, obtained from the images fraction, are similar with the results from scientific papers and data from laser scanning. In Porto Alegre, the surface temperature indicated strong correlation with meteorological data, and was characterized by higher values in urbanized areas and lower values where the occupation is least intense. In urban areas, higher values of temperature are found in areas with horizontal occupation pattern, while the lowest values are found in verticalized regions. Furthermore, it is possible to suggest that the chosen methodology lead to conclusions that are consistent with other data of land use and occupation from different sources. Contributing with some information about characteristics of the urban area and urban climate of the city of Porto Alegre, which are usually not well documented in academic databases.

A ‘flexibilização do perímetro urbano’ é praticada nos municípios, por intermédio do poder público municipal, ao expandirem significativamente suas ‘zonas urbanas’ através de sucessivas ampliações do perímetro urbano. Essa prática, que está em conformidade com o conjunto da legislação vigente, ocorre segundo interesses políticos e econômicos, possivelmente sob demanda do mercado imobiliário e fundiário. O dimensionamento exagerado da zona urbana viabiliza a ocupação de áreas periféricas, distantes de áreas consolidadas, estimulando o processo de expansão urbana dispersa, cujos efeitos negativos repercutem sobre aspectos sociais, econômicos e ambientais dos municípios. A presente pesquisa desenvolve um estudo de caso em Lajeado / RS, no período entre 1984 e 2016, com o objetivo de investigar as ‘origens’ da flexibilização do perímetro urbano e, posteriormente, examinar suas ‘repercussões’ sobre a expansão urbana do município. O estudo das ‘origens’ investiga fatores associados à flexibilização do perímetro no município, considerando o papel da legislação e dos instrumentos de planejamento e analisando a evolução do crescimento urbano do município. O estudo das ‘repercussões’ investiga em que medida a flexibilização influenciou a expansão urbana de Lajeado, examinando de maneira associada, as ampliações ocorridas no perímetro urbano e a evolução da ‘mancha urbana’ (áreas construídas). A metodologia da pesquisa é estruturada por análises multi-temporais de indicadores demográficos, socioeconômicos e espaciais, implementadas com auxílio de técnicas e ferramentas SIG. A metodologia de análise da expansão urbana envolve procedimentos de classificação de imagens de sensoriamento remoto, utilizados na produção de mapas temáticos de cobertura do solo e de ‘áreas construídas’, posteriormente examinados através de métodos de análises ‘pós-classificação’ e ‘métricas da paisagem’. Os resultados obtidos para Lajeado permitiram demonstrar o rápido crescimento urbano do município no período analisado e, evidenciam que as ampliações do perímetro urbano tiveram influências significativas sobre o processo de expansão urbana, que se tornou mais intenso e apresentou características de dispersão espacial das ‘áreas construídas’. / The 'urban growth boundary flexibilization’ is practiced in the municipalities, by the means of the local public administration, to expand significantly its 'urban zone' through successive expansions of the urban growth boundary. This practice, which is in accordance with the existing legislation, occurs in according to political and economic interests, possibly under real estate and land market demands. The exaggerated urban zone sizing enables the occupation of peripheral areas, far from consolidated areas, stimulating the process of dispersed urban expansion, whose negative effects have an impact on social, economic and environmental aspects of the municipalities. This research develops a case study in Lajeado/RS, in the period between 1984 and 2016, with the objective of investigating the 'origins' of the urban growth boundary flexibilization and then, examine their 'repercussions' on the urban expansion. The study of 'origins' investigates factors associated with the boundary flexibilization in the municipality, considering the role of legislation and planning instruments, and analyzing the evolution of the urban growth. The study of ' repercussions ' investigates to what extent the flexibilization influenced the urban expansion of Lajeado, examining the enlargements that occurred in the urban zone, in association with the evolution of the ‘urban footprint’ (built-up areas). The research methodology is based on multi-temporal analysis of demographic, socioeconomic and spatial indicators, implemented with the support of GIS tools and techniques. The methodology of analysis of the urban expansion involves procedures of remote sensing image classification, used for production of thematic maps of land cover and built-up areas, that are afterward examined with methods of 'posclassification' and 'landscape metrics’ analysis. The results obtained for Lajeado allowed to demonstrate rapid urban growth of the municipality in the analysis period, and showed that the enlargement of the urban growth boundary had significant influences on the process of urban expansion, which became more intense and presented characteristics of spatial dispersion of the built-up areas.

Submitted by Maike Costa (maiksebas@gmail.com) on 2016-01-05T13:48:26Z No. of bitstreams: 1 arquivototal.pdf: 7568963 bytes, checksum: 32ef4ce1b59e672b2d9e74ba34550000 (MD5) / Made available in DSpace on 2016-01-05T13:48:26Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 7568963 bytes, checksum: 32ef4ce1b59e672b2d9e74ba34550000 (MD5) Previous issue date: 2014-03-07 / This dissertation examines the formation and the physical growth of Bairro dos Estados, a neighborhood located at João Pessoa, the capital city of Paraíba State, in Brazil, which in the 1970s and 1980s was the most preferred residential area for the local middle and upper class families. It aims at two main objectives: (a) to explain how the lands of the neighborhood were subdivided in order to create the streets, blocks and lots which constitute it today; and (b) to show how the blocks and lots were gradually occupied by buildings. The study that generate it was based mainly on the analysis of varied images – aerial photos, other photos, plans of the city and projects of allotments – and the main method used in it was the comparative one. The situations portrayed by images concerning the years 1976, 1989, 1998 and 2008 were compared. These are some essential facts of the history revealed by the research: the neighborhood had its origin in a street layout approved in the 1920s; part of this layout started to be occupied by houses in the end of the following decade; in the late 1960s only some small stretches of the neighborhood were not yet subdivided into blocks and lots; after 1970 numerous middle and upper class families settled down in the neighborhood, giving it a privileged status; in the late 1980s the neighborhood was already a consolidated urban tissue, with good infrastructure and few vacant lots, but it started to be rivaled by some burgeoning coastal neighborhoods; in the two following decades it experienced a loss of prestige and a certain stagnation; latterly, it regained a certain prestige thanks to the replacement of many of its houses by apartment towers, shops and office buildings. Being the first study on the neighborhood with the approach adopted here, this work aims to give a contribution to the understanding of the physical growth of the capital of Paraiba during the last nine decades. / Esta dissertação tem por objeto a formação e a evolução física do Bairro dos Estados, situado em João Pessoa, capital da Paraíba, que nos anos 1970 e 1980 era o local de moradia preferido pelas famílias de classe média e alta da cidade. Ela persegue dois objetivos principais: (a) explicar como as terras do bairro foram sendo parceladas de modo a gerar as vias, quadras e lotes que o constituem hoje; e (b) mostrar como suas quadras e lotes foram sendo gradualmente ocupados por edificações. O estudo que a gerou baseou-se principalmente na análise de imagens variadas – fotografias aéreas, outras fotos, plantas da cidade e projetos de loteamentos –, e o principal método nele empregado foi o comparativo. Foram comparadas principalmente as situações retratadas por tais imagens nos anos de 1976, 1989, 1998 e 2008. Eis alguns fatos marcantes da história revelada pela dissertação: o bairro teve sua origem num plano de arruamento aprovado nos anos 1920; parte dele começa a ser ocupada com casas no fim da década seguinte; em fins da década de 1960 só alguns pequenos trechos do bairro não estavam ainda loteados; após 1970 numerosas famílias de renda média e alta se instalam no bairro, dando-lhe um status privilegiado; em fins dos anos 1980 o bairro já constitui um tecido urbano consolidado, com boa infraestrutura e poucos vazios, mas começa a sofrer a con-corrência dos bairros da orla marítima; nas duas décadas seguintes ele conhece uma perda de prestígio e uma certa estagnação; ultimamente ele readquire um certo prestígio devido à substituição de muitas de suas casas por altos prédios de apartamentos ou estabelecimentos comerciais e de serviços. Por ser o primeiro estudo do bairro com o enfoque aqui adotado, este trabalho propõe-se a dar uma contribuição para a com-preensão do crescimento urbano da capital paraibana durante as últimas nove décadas.