The inner-ring suburbs of major metropolitan areas such as Washington, DC are either being redeveloped already or are poised to be redeveloped over the next several decades. The engineered 'gray' infrastructure networks in these areas, largely put in place between 100 and 75 years ago, are aging and reaching the end of their useful life. New developments are being funded by real estate investment trusts and developers and are being welcomed by municipalities and a public that are often genuinely inspired to create the more livable places of the future. Such redevelopments provide a unique opportunity not to just import new 'green' features, but to reimagine the fundamental connections between ecological, human, and non-human systems within the fabric of the larger community in a way that profoundly improves the cognitive experience of a place for the people and wildlife that reside there. The project begins by recognizing this opportunity and posing a question. Through thoughtful design, how can we bring people back into balance with their environment and back into touch with each other? By working with the cultural and built fabric of a place, the project proposes to reintroduce ecological systems and create places that might not be a perfect clean slate but are somehow just right for the people that live there. The project proceeds first by developing an understanding of the overall ecological context for each of four primary development corridors in Virginia, west of Washington, D.C. across the Potomac River. Then, key intersections between stream systems and the development corridors are identified and assessed to determine (a) whether any existing landscape framework surrounding the stream feature is in place and (b) whether the amenities necessary to support a walkable Urban Village center are present within a half mile in each direction along the route. The project proposes a design for revealing a continuous flow stream channel currently piped underground and creating integrated stormwater detention basins along the historic stream channel path at the headwaters of Spout Run in northern Arlington County Virginia. Stormwater mains downstream from the headwaters have already been deemed below capacity for the unprecedentedly intense storms that have become an annual occurrence. Here, the major transportation and development corridor, Route 29 (Lee Highway), just across the Potomac River west of Washington D.C, crosses Glebe Road and a unique geological formation, dubbed for this thesis as the 'Headwaters Plateau'. It is an intersection between historically significant transportation routes as well as a unique intersection between landscape and the built environment. Around the Headwaters Plateau, not just Spout Run but the waters of four other streams begin their path to the Potomac River, flowing through numerous Arlington County neighborhoods along the way. As redevelopment plans take shape for the Lee Highway corridor through northern Arlington County, this thesis proposes the unique intersection between the Headwaters Plateau at Spout Run Gap along Route 29 as the site for the core of a modern Urban Village, with the Plateau and the Spout Run Headwaters Channel as the landscape framework around which the redeveloping Village should be built. / Master of Landscape Architecture / This thesis proposes a design for revealing a continuous flow stream channel currently piped underground and creating integrated stormwater detention basins along the historic stream channel path at the headwaters of Spout Run in northern Arlington County, Virginia. Stormwater mains downstream from the headwaters have already been deemed below capacity for the unprecedentedly intense storms that have become an annual occurrence. Here, the major transportation and development corridor, Route 29 (Lee Highway), just across the Potomac River west of Washington D.C, crosses Glebe Road and a unique geological formation, dubbed for the purpose of this thesis as the 'Headwaters Plateau'. It is an intersection between historically significant transportation routes as well as a unique intersection between landscape and the built environment. Around the Headwaters Plateau, not just Spout Run but the waters of four other streams begin their path to the Potomac River, flowing through numerous Arlington County neighborhoods along the way. As redevelopment plans take shape for the Lee Highway corridor through northern Arlington County, this thesis proposes the unique intersection between the Headwaters Plateau at Spout Run Gap along Route 29 as the site for the core of a modern Urban Village, with the Plateau and the Spout Run Headwaters Channel as the landscape framework around which the redeveloping Village should be built. Through design, this thesis is an investigation of the potential integration of ecological systems such as stream hydrology into the design of modern 'Urban Villages' with the intent to create impactful individual experiences that provide a shared sense of connection within the community to its surrounding landscape. Throughout the country, redevelopment plans are focused on creating increased-density 'mixed-use' communities within existing urban and suburban areas - often called Urban Villages in the lexicon of the New Urbanism planning theory. This represents a move away from the predominant approach of separation of land use zoning practices. Such redevelopments provide a unique opportunity to not only import new 'green' features, but to reimagine the fundamental connections between ecological, human, and non-human systems within the fabric of the larger community in a way that profoundly improves the cognitive experience of a place for the people and wildlife that reside there.

京都大学 / 0048 / 新制・課程博士 / 博士(地球環境学) / 甲第22104号 / 地環博第190号 / 新制||地環||37(附属図書館) / 京都大学大学院地球環境学舎地球環境学専攻 / (主査)教授 西前 出, 教授 小林 広英, 准教授 鬼塚 健一郎 / 学位規則第4条第1項該当 / Doctor of Global Environmental Studies / Kyoto University / DGAM

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Cette thèse s'inscrit dans la problématique générale de la transformation du marché du travail en Chine durant les deux dernières décennies et de la place des jeunes migrants dans ce processus. Dans un contexte de transition économique, nous assistons en Chine à des phénomènes de segmentation des marchés du travail, à la montée du taux de chômage, et à la création massive d'emplois informels, le tout se traduisant par une mise en mobilité généralisée du monde du travail, notamment à travers un phénomène massif de migration interne. Les jeunes en mobilité - notamment les jeunes diplômés « nomades » dans les grandes villes - se voient de plus en plus relégués dans les zones urbaines de vulnérabilité (Robert Castel) où différentes formes de précarités (notamment du travail et de logement) s’enchevêtrent et s’accumulent. Dans une société de croissance, les inégalités se multiplient et se creusent de manière vertigineuse. La mobilité sociale semble en panne et le sentiment d’injustice augmente. C’est donc à ce phénomène de migration dans un double mouvement de transformation du marché du travail et de recomposition urbaine que nous consacrons nos réflexions dans ce travail. Nous sommes en présence de jeunes migrants qualifiés vivant dans les villages-Urbains à Pékin, figures analytiques des métamorphoses en cours. Cette recherche a été menée durant l’année 2011 – 2012 à Pékin. Ces individus ont de 2 à 8 ans d’expérience professionnelle et résident dans les villages urbains à Pékin au moment de l’enquête. Cette recherche s’appuie sur des matériaux empiriques collectés et analysés selon des méthodes variées. Le travail de terrain a permit de réaliser 180 questionnaires (données quantitatives), 60 entretiens biographiques (matériau qualitatif), ainsi qu’une observation ethnographique dans un village-Urbain.Cette étude a pour but d'appréhender, en termes de carrières, le parcours d’insertion ainsi que l’expérience migratoire des jeunes diplômés, à partir des processus structurels (politiques d'emploi, politique migratoire, réseaux, etc.), et de la mise en récit, par les jeunes, de leur parcours, afin de mettre en évidence les mécanismes de production des inégalités et la construction d’identités sociales derrière les changements observés en Chine. Notre étude poursuit trois objectifs. Le premier consisterait à saisir objectivement les différentes positions et statuts occupés et d'autre part, à saisir la manière dont les jeunes interprètent leur parcours selon la perspective dans laquelle ils se trouvent, les positions qu'ils occupent et les stratégies qu'ils mettent en place. Le deuxième objectif serait de démontrer d'une part, comment les identités objectives et subjectives interagissent et se redéfinissent et d'autre part, comment le rapport au travail des jeunes se construit. En troisième lieu, le but consiste à articuler la question de l’insertion professionnelle et du rapport à l’espace, alors que la mobilité tend à devenir une norme sociale tant dans le monde du travail que dans la gestion migratoire (Hélène Pellerin, 2011). / This thesis is part of the broader issue of the transformation of the labor market in China over the past two decades and the place of young migrant workers in this process. In the context of economic transition, Chine has witnessed many important changes such as the phenomenon of urban labor market segmentation, the rise in unemployment and the massive creation of informal jobs, all leading to increased mobility in the working world, as seen particularly in the phenomenon of mass domestic migration. Migrant working youth – especially university graduates from a rural background (or smaller cities) who move to large cities - are being increasingly relegated to the urban areas of vulnerability (Robert Castel,1995) where different forms of precariousness (especially in terms of employment and housing) overlap and accumulate. China’s strong economic growth has given rise to inequalities that are multiplying and deepening at a dizzying rate. Upward mobility seems broken as feeling of injustice is rising. This migration phenomenon, a simultaneous transformation of the labor market and urban restructuring, is the focus of our study. We shall examine the case of young skilled migrants living in urban villages in Beijing, analytical figures of metamorphosis in progress. This research was conducted between 2011 and 2012 in an urban village in Beijing. The subjects had between 2 and 8 years of professional experience and lived in urban villages in Beijing at the time of the survey. This research is based on empirical data collected and analyzed using various methods. Our fieldwork in China enabled us to distribute180 questionnaires (quantitative data), 60 biographical interviews (qualitative material) as well as an ethnographic observation in an urban village. This study aims to investigate, in terms of careers, the process of professional integration and the experience of migration of graduates by looking at structural factors (employment policy, migration policy, networks, etc.), and the narrative pattern used by young people to relate their journey, in order to highlight the mechanisms that produce inequalities and construct social identities underlying the changes being observed in China. Our study has three objectives. The first is to understand both the different positions and statuses held and the way in which young people interpret their journey from their perspective, the positions they hold and the strategies they adapt. The second objective is to demonstrate how their objective and subjective identities interact and are redefined, as well as how their relationships toward work are formed. Thirdly, the goal is to articulate the issue of professional integration and its relationship to physical space, in a context where mobility is becoming a social norm in both the working world and the management of migration (Hélène Pellerin 2011).