Showing papers on "Urban density published in 2006"

Sustainable Urban Forms Their Typologies, Models, and Concepts

Abstract: This article identifies sustainable urban forms and their design concepts. In addition, it addresses the question of whether certain urban forms contribute more than others to sustainability. A thematic analysis has been used to coop with the vast body of sustainable development and environmental planning literature. The analysis identifies seven design concepts related to sustainable urban forms: compactness, sustainable transport, density, mixed land uses, diversity, passive solar design, and greening. Moreover, it identifies four types of sustainable urban forms: the neotraditional development, the urban containment, the compact city, and the eco-city. Finally, this article proposes a Matrix of Sustainable Urban Form to help planners in assessing the contribution of different urban forms to sustainability.

Ordinary Cities: Between Modernity and Development

Abstract: With the urbanization of the world's population proceeding apace and the equally rapid urbanization of poverty, urban theory has an urgent challenge to meet if it is to remain relevant to the majority of cities and their populations, many of which are outside the West. This groundbreaking book establishes a new framework for urban development. It makes the argument that all cities are best understood as ‘ordinary’, and crosses the longstanding divide in urban scholarship and urban policy between Western and other cities (especially those labelled ‘Third World’). It considers the two framing axes of urban modernity and development, and argues that if cities are to be imagined in equitable and creative ways, urban theory must overcome these axes with their Western bias, and that resources must become at least as cosmopolitan as cities themselves. Tracking paths across previously separate literatures and debates, this innovative book, a postcolonial critique of urban studies, traces the outlines of a cosmopolitan approach to cities, drawing on evidence from Rio, Johannesburg, Lusaka and Kuala Lumpur. Key urban scholars and debates, from Simmel, Benjamin and the Chicago School to Global and World Cities theories are explored, together with anthropological and developmentalist accounts of poorer cities. Offering an alternative approach, Ordinary Cities skilfully brings together theories of urban development for students and researchers of urban studies, geography and development.

Urban Complexity and Spatial Strategies: Towards a Relational Planning for Our Times

Abstract: Urban Complexity and Spatial Strategies develops important new relational and institutionalist approaches to policy analysis and planning, of relevance to all those with an interest in cities and urban areas. Well-illustrated chapters weave together conceptual development, experience and implications for future practice and address the challenge of urban and metropolitan planning and development. Useful for students, social scientists and policy makers, Urban Complexity and Spatial Strategies offers concepts and detailed cases of interest to those involved in policy development and management, as well as providing a foundation of ideas and experiences, an account of the place-focused practices of governance and an approach to the analysis of governance dynamics. For those in the planning field itself, this book re-interprets the role of planning frameworks in linking spatial patterns to social dynamics with twenty-first century relevance.

Comparing High and Low Residential Density: Life-Cycle Analysis of Energy Use and Greenhouse Gas Emissions

Abstract: This study provides an empirical assessment of energy use and greenhouse gas GHG emissions associated with high and low residential development. Three major elements of urban development are considered: construction materials for infrastructure including residential dwellings, utilities, and roads, building operations, and transportation private automobiles and public transit. Two case studies from the City of Toronto are analyzed. An economic input-output life-cycle assessment EIO-LCA model is applied to estimate the energy use and GHG emissions associated with the manufacture of construction materials for infrastructure. Operational requirements for dwellings and transportation are estimated using nationally and/or regionally averaged data. The results indicate that the most targeted measures to reduce GHG emissions in an urban development context should be aimed at transportation emissions, while the most targeted measures to reduce energy usage should focus on building operations. The results also show that low-density suburban development is more energy and GHG intensive by a factor of 2.0-2.5 than high-density urban core development on a per capita basis. When the functional unit is changed to a per unit of living space basis the factor decreases to 1.0-1.5, illustrating that the choice of functional unit is highly relevant to a full understanding of urban density effects.

Social networks in natural resource management: what is there to learn from a structural perspective?

Abstract: With accelerating urbanization it is crucial to understand how urban ecosystems play a part in generating ecosystem services for urban dwellers, such as clean water, spaces for recreation, stress relief and improved air quality. An equally important question relate to who gets to enjoy these benefits, i.e. the distribution of ecosystem services, and how issues of power and equity influence the management of ecosystems. Through case studies from the urban landscape of Stockholm, this doctoral thesis engages with these perspectives through combining ecological theory with social theory, including social network analysis, actor-network theory and social movement theory. Strategies for how to improve urban ecosystem management are presented along with frameworks for how to analyze issues of power and equity in relation to natural resource management.Paper I shows that ecosystem management can be studied through analyzing the structure of social networks, i.e. the patterns of relations between agencies, stake-holders and user groups. Paper II and Paper III analyze, based on a network survey of 62 civil society organizations and in-depth interviews, a transformational process of how an urban local movement managed to protect a large urban green area from exploitation (The Stockholm National Urban Park). Paper IV discusses, based on several case studies from Stockholm, a conducive network structure for linking managers and user groups (e.g. allotment gardens, cemetery managers, and urban planners) across spatial ecological scales so as to improve urban green area management. Paper V presents a framework to analyze the social-ecological dynamics behind the generation and distribution of ecosystem services in urban landscapes.The thesis points towards the notion of "a social production of ecosystem services" and argues for deeper engagement with urban political ecology and critical geography to inform governance and collective action in relation to urban ecosystems.

Urban Density and the Rate of Invention

Abstract: Economists, beginning with Alfred Marshall, have studied the significance of cities in the production and exploitation of information externalities that, today, we call knowledge spillovers. This paper presents robust evidence of those effects. We show that patent intensity - the per capita invention rate - is positively related to the density of employment in the highly urbanized portion of MAs. All else equal, a city with twice the employment density (jobs per square mile) of another city will exhibit a patent intensity (patents per capita) that is 20 percent higher. Patent intensity is maximized at an employment density of about 2,200 jobs per square mile. A city with a more competitive market structure or one that is not too large (a population less than 1 million) will also have a higher patent intensity. These findings confirm the widely held view that the nation's densest locations play an important role in creating the flow of ideas that generate innovation and growth.

The eco-city: ten key transport and planning dimensions for sustainable city development:

Abstract: Making existing cities and new urban development more ecologically based and liveable is an urgent priority in the global push for sustainability. This paper discusses ten critical responses to this issue and summarizes them in a simple conceptual model that places the nexus between transport and urban form at the heart of developing an eco-city. This involves compact, mixed-use urban form, well-defined higher-density, human-oriented centres, priority to the development of superior public transport systems and conditions for non-motorized modes, with minimal road capacity increases, and protection of the city's natural areas and food-producing capacity. These factors form the framework in which everything else is embedded and must operate, and if they are not addressed only marginal changes in urban sustainability can be made. Within this framework, environmental technologies need to be extensively applied. Economic growth needs to emphasize creativity and innovation and to strengthen the environmental, s...

Behaviour, preferences and cities: urban theory and urban resurgence

Abstract: Summary. The resurgence of big, old cities and their regions is real, but it is merely a part of a broader pattern of urban change in the developed countries, whose broadest tendency is urban emergence, including suburbanisation, and movements of population to certain ‘Sunbelt’ regions. The problem is that it is difficult to accommodate explanation of both resurgence and emergence using the main explanations in the field today. These include: theories of the knowledge or creative economy, urban amenities, diversity and tolerance, and urban beauty. In most of their common specifications, they do well for either resurgent or emergent cities, but not for both at the same time. This suggests that these ideas, interesting as they are, require much greater specification and, in some cases, overhaul, in order to offer satisfactory responses to the diversity of patterns of urban growth. By examining some of these deficiencies, we conclude that urban theory needs a better understanding of urban choice behaviours and especially the effects of bundling, the limits to preference substitutions and the relationship between past and present preferences, in order to become fully effective in explaining urban resurgence and urban emergence. When these aspects of choice and preference are better integrated into urban theory, then the ‘exogenous’ causes of urbanisation can be made more endogenous and, in addition, they can be applied better to both emergence and resurgence. Urban research can, by so doing, also potentially become more policy-relevant.

Urban Landscapes and Sustainable Cities

Abstract: Ecological research targeting sustainable urban landscapes needs to include findings and methods from many lines of ecological research, such as the link between biodiversity and ecosystem function, the role of humans in ecosystems, landscape connectivity, and resilience. This paper reviews and highlights the importance of these issues for sustainable use of ecosystem services, which is argued to be one aspect of sustainable cities. The paper stresses the need to include social and economic factors when analyzing urban landscapes. Spatially explicit data can be used to assess the roles different green areas have in providing people with ecosystem services, and whether people actually have access to the services. Such data can also be used to assess connectivity and heterogeneity, both argued to be central for continuous, long-term provision of these services, and to determine the role urban form has for sustainability.

Scale Mismatches in Management of Urban Landscapes

Abstract: Urban landscapes constitute the future environment for most of the world's human population. An increased understanding of the urbanization process and of the effects of urbanization at multiple scales is, therefore, key to ensuring human well-being. In many conventional natural resource management regimes, incomplete knowledge of ecosystem dynamics and institutional constraints often leads to institutional management frameworks that do not match the scale of ecological patterns and processes. In this paper, we argue that scale mismatches are particularly pronounced in urban landscapes. Urban green spaces provide numerous important ecosystem services to urban citizens, and the management of these urban green spaces, including recognition of scales, is crucial to the well-being of the citizens. From a qualitative study of the current management practices in five urban green spaces within the Greater Stockholm Metropolitan Area, Sweden, we found that 1) several spatial, temporal, and functional scales are recognized, but the cross-scale interactions are often neglected, and 2) spatial and temporal meso-scales are seldom given priority. One potential effect of the neglect of ecological cross-scale interactions in these highly fragmented landscapes is a gradual reduction in the capacity of the ecosystems to provide ecosystem services. Two important strategies for overcoming urban scale mismatches are suggested: 1) development of an integrative view of the whole urban social-ecological landscape, and 2) creation of adaptive governance systems to support practical management.

The urban transition in Sub-Saharan Africa: implications for economic growth and poverty reduction

Abstract: This paper challenges several common myths that cloud discourse about urban development in Africa. It finds that urbanization in the region is not excessive or imbalanced relative to the experience of other regions. Internal migration, which is not the main source of urban growth, does not account for urban poverty. Migration appears favorable on balance for sending and receiving areas, and population mobility benefits rural and urban households as many retain a foothold in both areas to spread risks. Although Africa has been frequently described as featuring a disconnect between urbanization and economic growth, in reality most of the economic growth that has taken place in the past decade derives from mainly urban-based sectors (industry and services), and this is especially true of the better-performing economies. But cities have clearly not lived up to their productive potential because of widespread neglect and bad management. Urban poverty is not mainly a function of urban expansion, nor is it a sign of failure of the urban economies in Africa. There is evidence that much of the deprivation in cities, and the emerging urban public health problems, relate to institutional failures that perpetuate social exclusion and inequalities between the urban poor and the urban non-poor.

Slow cities: sustainable places in a fast world

Abstract: :This article examines the Slow Food and Slow City movement as an alternative approach to urban development that focuses on local resources, economic and cultural strengths, and the unique historical context of a town. Following recent discussions about the politics of alternative economic development, the study examines the Slow City movement as a strategy to address the interdependencies between goals for economic, environmental, and equitable urban development. In particular, we draw on the examples of two Slow Cities in Germany—Waldkirch and Hersbruck, and show how these towns are retooling their urban policies. The study is placed in the context of alternative urban development agendas as opposed to corporate-centered development. We conclude the article by offering some remarks about the institutional and political attributes of successful Slow Cities and the transferability of the concept.

Design for Ecological Democracy

Abstract: Over the last fifty years, the process of community building has been lost in the process of city building. City and suburban design divides us from others in our communities, destroys natural habitats, and fails to provide a joyful context for our lives. In Design for Ecological Democracy, Randolph Hester proposes a remedy for our urban anomie. He outlines new principles for urban design that will allow us to forge connections with our fellow citizens and our natural environment. He demonstrates these principles with abundantly illustrated examples -- drawn from forty years of design and planning practice -- showing how we can design cities that are ecologically resilient, that enhance community, and that give us pleasure. Hester argues that it is only by combining the powerful forces of ecology and democracy that the needed revolution in design will take place. Democracy bestows freedom; ecology creates responsible freedom by explaining our interconnectedness with all creatures. Hester's new design principles are founded on three fundamental issues that integrate democracy and ecology: enabling form, resilient form, and impelling form. Urban design must enable us to be communities rather than zoning-segregated enclaves and to function as informed democracies. A simple bench at a centrally located post office, for example, provides an opportunity for connection and shared experience. Cities must be ecologically resilient rather than ecologically imperiled, adaptable to the surrounding ecology rather than dependent on technological fixes. Resilient form turns increased urban density, for example, into an advantage. And cities should impel us by joy rather than compel us by fear; good cities enrich us rather than limit us. Design for Ecological Democracy is essential reading for designers, planners, environmentalists, community activists, and anyone else who wants to improve a local community.

How urban structure can affect city sustainability from an air quality perspective

Abstract: Despite the progress made in controlling local air pollution, urban areas show increasing signs of environmental stress and air quality is one of the major concerns. The findings of several studies provide evidence that the shape of a city and the land use distribution determine the location of emission sources and the pattern of urban traffic, affecting urban air quality. This work focuses on the potential impacts of different land use patterns on urban air quality. Three imaginary cities were created, based on alternative urban planning strategies, considering different land use patterns: from the scenario of urban sprawl to the opposite scenario of a compact city with mixed land use. The mesoscale photochemical system MEMO/MARS was applied to evaluate the urban air quality in each of the idealized city structures. Simulation results indicate that more compact cities with mixed land use provide better urban air quality compared to disperse and network cities.

New urban governance: Institutional change and consequences for urban development

Abstract: All over the world cities are searching for appropriate ways of governance in the context of far-reaching political, economic, social and institutional transformations affecting all levels of scale...

Green Urban Political Ecologies: Toward a Better Understanding of Inner-City Environmental Change:

Abstract: This research uses a Marxist urban political ecology framework to link processes of urban environmental metabolization explicitly to the consumption fund of the built environment. Instead of reinventing the wheel, I argue in this paper that Marxist notions of metabolism are ideal for investigating urban environmental change and the production of uneven urban environments. In so doing, I argue that despite the embeddedness of Harvey's circuits of capital within urban political economy, these connected notions still have a great deal to offer regarding better understanding relations between consumption and metabolization of urban environments. From this theoretical perspective, I investigate urban socionatural metabolization as a function of the broader socioeconomic processes related to urban restructuring within the USA between 1962 and 1993 in the Indianapolis inner-city urban forest. The research examines the relations between changes in household income and changes in urban forest canopy cover. The res...

The Location of Culture: The Urban Culturalist Perspective

Abstract: The majority of research in urban sociology tends to favor the study of urbanization, the development and growth of cities, over urbanism, the way of life in cities. Here, I identify a strand of ur...

An Overview of Water Sensitive Urban Design Practices in Australia

Abstract: Ecologically Sustainable Development in Australia can be described as going beyond the protection of the environment from the impacts of pollution, to protecting and conserving natural resources. In an urban environmental context this means urban development (both greenfield development and urban renewal) that seeks to have no long term effects on various aspects of the environment related to aspects such as greenhouse gas levels, material resources, biodiversity and ambient water environments. Water environments, such as waterways and coastal waters, and water supply catchments are key areas where urban development can have significant impacts. Water Sensitive Urban Design in Australia has evolved from its early association with stormwater management to provide a broader framework for sustainable urban water management. It provides a common and unified method for integrating the interactions between the urban built form (including urban landscapes) and the urban water cycle. This paper presents an overview of current industry practice and research implementation of Water Sensitive Urban Design in Australia.

Progress toward sustainable settlements: a role for urban climatology

Abstract: Sustainable development can be defined as that which meets the needs of the current generation while leaving sufficient resources for the needs of future generations. A central objective is to decouple conventional resource use (and its corollary, waste generation) from economic development through technological innovation, improved efficiency and changes in individual practices. As the global population becomes urbanized and human activity is concentrated in urban areas, settlement planning is a key aspect of sustainability. The widespread inclusion of environmental objectives in urban plans at all scales provides an opportunity for the incorporation of urban climate knowledge into the planning process on a routine basis. Many of the stated objectives have both direct and indirect connections to climate. However, for this to happen, climate research and results must be linked more explicitly to the objectives of the sustainable settlement. In this paper, the relevance of sustainability to urban design and climate is discussed and the potential contribution of current urban climatology is assessed, identifying areas of special consideration for transfer to achieve sustainable urban planning and design.

The Influence of Local Urban Containment Policies and Statewide Growth Management on the Size of United States Urban Areas

Abstract: . In an attempt to slow the consumption of urban land for a given population, and the negative outcomes thought by some to be generated by such sprawl, regulations in the form of (i) the local imposition of urban containment policies that restrict or prohibit the amount and/or the type of urban settlement beyond a certain line and (ii) the statewide enactment of mandatory growth management requirements for all local governments have been enacted in the United States. This paper describes a regression-based analysis that finds that different forms of these policies are achieving their desired goal of shrinking the square mile size of an urban area. A comparison of the influence of the various forms of urban containment and growth management policies with other “natural evolution,”“flight from blight,” and “fiscalization of land use” factors that also influence the square mile size of an urban area is made, and policy implications are offered.

The Earthscan Reader in Rural-Urban Linkages

Abstract: Part 1: Introduction * Small Urban Centres and Large Villages: The Habitat For Much of the World's Low-Income Population * Part II: Rural Urban Linkages and Livelihood Transformations * Survival and Accumulation Strategies at the Rural Urban Interface in North-West Tanzania * Changing Rural Urban Linkages in Mali, Nigeria and Tanzania * Evolving Rural Urban Relations and Livelihoods in Southeast Asia * Part III: Policies that Address, Ignore or Misunderstand Rural Urban Linkages * Transitions in Sub-Saharan Africa: Agriculture, Urbanization and Income Growth * A Regional Network Strategy for Reciprocal Rural Urban Linkages: An Agenda for Policy Research with Reference to Indonesia * The Role of Small and Intermediate Urban Centres in Regional and Rural Development: Assumptions and Evidence * The Small Town and Urban Context in China * Part 4 Mobility and Migration Between Rural and Urban Areas * Environmental Perceptions, Social Class and Demographic Change in Mexico City: A Comparative Approach * Improved Livelihoods In Improved Watersheds in India: Can Migration Be Mitigated? * Taking Advantage of Rural Assets as a Coping Strategy for the Urban Poor: The Case of Rural Urban Interrelations in Botswana * Part IV: Beyond the City Boundaries: Peri-Urban Areas and Environmental Issues * Urban Agriculture in the Metropolitan Zone of Mexico City: Changes Over Time in Urban, Suburban and Peri-Urban Areas * The Politics of Urban Rural Relations: Land Use Conversion in the Philippines * Ecological Footprints and Appropriated Carrying Capacity: What Urban Economics Leaves Out * An Overview of Urban Environmental Burdens at Three Scales: Intra-Urban, Urban-Regional and Global *

Environmentally sustainable cities. Critical review and operational conditions

Abstract: The political objective calling for environmentally sustainable development has provided the canvas for lively dialogue amongst scientists and analysts. Be that as it may, what have been found wanting are operational conditions for the achievement of environmental sustainability within specific anthropogenic systems, with cities being cited as a prime example of such systems. Indeed, from a historical perspective, cities have always been based on the concentration of humans and man-made elements, resulting in respective confinement of natural assets. As cities possess particular properties for their environmental basis, the general conditions governing sustainability require suitable modifications when applied to cities. In this context, the present paper examines the conditions for environmentally sustainable development in urban systems. The specific natural and socioeconomic characteristics of urban systems are systematically taken into account for defining environmentally sustainable development in cities. The paper proposes an operational framework for evaluating urban systems for their environmental performance. Urban systems, presenting specific characteristics necessary for creating welfare with high density, ask for particular conditions for their environmentally sustainable development. These conditions differ substantially from those defining sustainability in broader geographical systems. Copyright © 2006 John Wiley & Sons, Ltd and ERP Environment.

Urban Economics and Real Estate: Theory and Policy

Abstract: Part I: Economics and Urban Areas. Chapter 1. Introduction to Urban Economics. Chapter 2. Schools of Thought in Urban Economics. Chapter 3. Location Decisions, Agglomeration Economies, and the Origins of Cities. Chapter 4. The Economic Functions of Cities. Part II: Location Patterns in Urban Areas. Chapter 5. Introduction to Urban Location Patterns: Static Analysis. Chapter 6. Using the Monocentric City Model. Chapter 7. Empirical Testing of the Moncentric City Model. Part III: Urban Housing and Real Estate. Chapter 8. Housing in Urban Areas. Chapter 9. Housing Policy in the United States. Chapter 10. Real Estate Law and Institutions. Chapter 11. Real Estate Markets. Chapter 12. Real Estate Development and Investment. Part IV: Government in Urban Areas. Chapter 13. The Public Sector in Urban Areas. Chapter 14. Urban Transportation. Part V: Urban Social Problems. Chapter 15. An Overview of Urban Social Problems. Chapter 16. Urban Poverty and Its Spatial Concentration. Chapter 17. Crime in Urban Areas. Chapter 18. Education, Labor Markets, and Migration. Part VI: Urban Growth. Chapter 19. Models of Metropolitan Economic Growth. Chapter 20. Agglomeration Economies, Technical Change, and Urban Growth. Chapter 21. Economic Development Policies for Urban Areas. Appendix: A Review of Some Mathematics and Microeconomic Theory. Answers to Selected Exercises. Index.

Adaptation strategies for climate change in the urban environment: Assessing climate change related risk in UK urban areas

Abstract: This paper presents a conurbation‐scale risk assessment methodology which aims to provide a screening tool to assist with planning for climate change‐related risks in the urban environment. This work has been undertaken as part of a wider, interdisciplinary project, Adaptation Strategies for Climate Change in the Urban Environment (ASCCUE). The main focus of ASCCUE is to help improve understanding of the consequences of climate change for urban areas and how these, and the neighbourhoods within them, can best be adapted. Adaptation options will be explored in the context of both conurbation‐scale strategic planning and neighbourhood‐level urban design. The paper conveys some of the initial outputs from the ASCCUE project. It firstly presents the overarching risk assessment framework, before outlining the GIS‐based elements of the methodology. This draws on a characterisation of the urban area into distinctive “urban morphology units” as the spatial framework for the analytical work. An example of heat rel...