From Rio to Johannesburg and Beyond: A long and winding road

This paper analyses the evolution of urban form in two North American metropolitan regions (Portland and Toronto) and asks how more sustainable regional form might come about in the future in these and other urban areas. In the past, dominant patterns of urban form have emerged in such regions at different historical periods. These morphological phases include mid 19th-century grids, streetcar suburb grids, garden suburbs, automobile suburbs and New Urbanist neighbourhoods (which have only recently made an appearance and may or may not become widespread). Judging by the performance of past types of urban morphology, five design values appear particularly important for more sustainable urban form in the future: compactness, contiguity, connectivity, diversity and ecological integration. Although these principles were not well supported by 20th-century development, contemporary movements such as the New Urbanism and Smart Growth re-emphasise them. The example of these two regions indicates that, in the absence of new technological, economic or geographical forces, public sector institutions and urban social movements represent the most likely means to bring about new, more sustainable types of urban form.     

Social sustainability and neighbourhood design: an investigation of residents' satisfaction in Delhi

Social and environmental goals are often mutually reinforcing. Urban forms may encourage social sustainability as well as social inclusion or may have the potential to create areas of crime and social exclusion. The issues of relationship between sustainable development and urban form have given birth to new paradigms of design approach such as new urbanism, the compact city and the eco-city. This paper examines the impact of urban form on social sustainability at the neighbourhood level. It seeks to better understand the relationship between urban form and social sustainability by comparing three neighbourhoods with dissimilar urban forms in Delhi, India. Household surveys and observation surveys in these three neighbourhoods were conducted, and it was found that the urban form of a neighbourhood plays a very important role in creating a socially sustainable residential neighbourhood. The study established that social interactions within the communities are higher when dwelling units are placed around the public realm or common open space. The study demonstrated that provision of high quality and well-located open space at the precinct level, mixed land use and good accessibility to the public realm and social infrastructure play an important role in increasing the social sustainability of the neighbourhood.     

The deep city: cultural heritage as a resource for sustainable local transformation

ABSTRACT

The sustainable city of the future is typically envisioned as smart, creative and disruptive, assuming that urban and local sustainability is achieved through new technology and innovation. However, considering that the built environments of our cities and surroundings are highly durable, there is also a need to focus on how resources brought from the past – histories, artefacts and places – may be used for promoting urban sustainability. We label this a “deep city” perspective on urban and local transformation. By looking at Røros, a World Heritage Site in central Norway with a dense and historic wooden urban centre, we investigate how its heritage protection facilitates the maintenance of a compact urban centre. We hold that a shared sense of place – the deepness– may serve as a resource against unsustainable sprawl and mall-oriented development.     

“Coal is in our food,coal is in our blood”: everyday environmental injustices of rural community gardening in Central Appalachia

ABSTRACT

Central Appalachia's historical dependence on natural resource extraction industries has contributed to a long history of under- and uneven development, including trends of persistent poverty, cycles of unemployment, weakened local governance, environmental degradation, and severe social inequalities relative to the rest of the nation. Though these trends have been well documented at structural and community-levels, scholarship is more limited in assessing how the conditions of natural resource dependency may shape the everyday experiences of those who live in such regions and how those everyday experiences may illuminate challenges for future development. Employing an embedded case study design, this study examines how everyday environmental injustices may be experienced via community gardening activities, a sustainable development-oriented activity celebrated in urban locations but largely unexplored in rural environments. Drawing upon in-depth interviews with 43 gardening programme coordinators and participants, the findings demonstrate that everyday environmental injustices are experienced across four distinct, yet overlapping and mutually reinforcing, dimensions: natural, built, human health, and socioeconomic environments. These factors in turn constrain programme participation and beneficial programme outcomes, particularly for more disadvantaged households that are affected by chronic illness, geographic isolation, and environmental hazards. Although the interviewees viewed many of these challenges as further justification for pursuing grassroots initiatives like community gardening programmes, these constraints also interacted in a way that limited the success of these locally-oriented sustainable development efforts, particularly for individuals who are the most socially, economically, and environmentally marginalised.     

The effect of intergroup comparison on willingness to perform sustainable behavior

The present research examines the effects of intergroup comparison on willingness to perform sustainable behavior. In Experiment 1, university students compared current students with past or future students, and then completed measures of willingness to perform sustainable behavior. Participants who compared to past students reported more willingness to perform sustainable behavior than those who compared to future students. In Experiment 2, university students again compared current students with past or future students and completed measures of sustainable beliefs and willingness to perform sustainable behavior. Participants who compared to past students reported more willingness to perform sustainable behavior than those who compared to future students. This effect was mediated by strengthened sustainable beliefs. The results show that intergroup comparison can be strategically employed to promote motivation to perform sustainable behavior.     

面向城市管理的城市建筑存量研究综述

城市建筑存量研究是为适应当前城市管理的需要而出现的理论研究,与国家制定的城市可持续发展战略具有内在一致性。本文对城市建筑存量的概念进行解析,全面阐述了城市建筑存量研究的意义,概述了城市建筑存量研究的系统边界、内涵和研究方法等,总结了城市建筑存量研究的三大领域：城市建筑存量时空演变及影响因素研究、城市建筑废弃物资源化开发潜力分析研究和城市可持续管理决策支持系统开发的研究现状。目前城市建筑存量理论体系尚不够完善、定量工具和基础数据库严重缺乏,对于城市决策支持不足,未来应在城市建筑存量时空演变及环境影响分析、开发融合多学科交叉及新技术应用的分析方法和辅助城市可持续管理决策三个领域加强和深化研究。     

Land Resource Sustainability for Urban Development: Spatial Decision Support System Prototype

Land resource sustainability for urban development characterizes the problem of decision-making with multiplicity and uncertainty. A decision support system prototype aids in the assessment of incremental land development plan proposals put forth within the long-term community priority of a sustainable growth. Facilitating this assessment is the analytic hierarchy process (AHP), a multicriteria evaluation and decision support system. The decision support system incorporates multiple sustainability criteria, weighted strategically responsive to local public policy priorities and community–specific situations and values, while gauging and directing desirable future courses of development. Furthermore, the decision support system uses a GIS, which facilitates an assessment of urban form with multiple indicators of sustainability as spatial criteria thematically. The resultant land-use sustainability scores indicate, on the ratio-scale of AHP, whether or not a desirable urban form is likely in the long run, and if so, to what degree. The two alternative modes of synthesis in AHP—ideal and distributive—provide assessments of a land development plan incrementally (short-term) and city-wide pattern comprehensively (long-term), respectively. Thus, the spatial decision support system facilitates proactive and collective public policy determination of land resource for future sustainable urban development.     

Sustainable consumption profile differences among Brazilian regions

Brazil is a vast country and there are several scientific studies reporting sustainable behavior in its different regions. Since methodologies used in these studies differ from one another, it is hard to compare them. This paper aims to identify whether differences in sustainable behavior occur in different Brazilian regions and what differences can be identified. Through a web survey, we analyzed data from 1,489 participants, from four different regions. We identified two factors (behavior and search for information), and analyzed the differences through multivariate analysis of variance. The Northeast region had a higher score for “search for information”, while Southern regions performed better on “behavior.” The Midwest region had the worst performance for both factors. The reasons for such differences may be greatly influenced by the social/cultural context of each region. The results also show that consumers still do not use their power of choice to pressure companies to become more sustainable.     

Neighbourhood - Open Space Relationships in Metropolitan Planning: a look across four scales of concern

New Urbanism and other metropolitan planning strategies may discount the importance of neighbourhood - open space relationships when dealing with some types of open spaces, particularly in city centre and urban fringe areas. In this paper I review a series of studies I have carried out over the past decade looking at people's perceptions and uses of urban open space. This research examined neighbourhood - open space relationships in the metropolitan area of Chicago, Illinois, USA at four scales of concern: quasi-public space within an immediate neighbourhood; a public park that spans different neighbourhoods; regional greenways; and a metropolitan bioreserve. In all of this work, my findings show how adjacent neighbourhoods are critical to the success of these open spaces, regardless of their scale. Lessons are drawn from each scale for how neighbourhood - open space relationships might be improved.     

Agroforestry as alternative land-use production systems for the tropics

The science of agroforestry has progressed significantly during the past three decades. This article describes and documents various prominent traditional agroforestry systems. In-depth research on interactive processes of some agrisilvicultural systems have been undertaken and quantified. It has been found that the presence of woody species can enhance nutrient cycling, and can improve soil productivity, soil conservation and soil biotic andfaunal activities. In simultaneous systems however, their presence can also cause competition with the associated food crops. Most agroforestry systems constitute ecologically and bio-physically sustainable land use systems. Some are highly sustainable and economically viable, in particular the highly complex and specialized types, such as the damar and rubber agroforests in Indonesia. Agroforestry systems have potential uses in stabilization of sloping lands and buffer zones around forest reserves, for recovering degraded lands, and for improving the productivity of the bush fallow system. Despite rapid progress in biophysical research, field application of the science of agroforestry is still minimal. This article examines the possibilities of exploring the multiple contributions of trees to food security, rural income generation, diversity of products and ecosystem conservation within sustainable agroforestry contexts. Research efforts in the new millennium need to focus more on practical research and also on socio-economic and policy factors that can enhance beneficial application of the science in the near future to smallholder farmers in the tropics.     

CLIMATE CHANGE IMPACTS ON NEW YORK CITY'S WATER SUPPLY SYSTEM1

ABSTRACT: It has been well established that the greenhouse gas loading of the atmosphere has been increasing since the mid 19th century. Consequently, shifts in the earth's radiative balance are expected with accompanying alterations to the earth's climate. With these anticipated, and perhaps already observable, changes in both global and regional climate, managers of regional water resources seek insight to the possible impacts climate change may have on their present and future water supplies. The types and degrees of impacts that climate change may have on New York City's water supply system were assessed in a study of a watershed at Allaben, New York. Hypothetical scenarios of future climate and climate change projections from three General Circulation Models (GCMs) were used in conjunction with the WatBal hydrological model and the Palmer Drought Severity Index (PDSI) to ascertain how runoff and soil moisture from this watershed may change in a warmer climate. For the worst case predictions, the results indicate that within the century of the 2000s, the watershed's air temperature may increase up to about 11°F, while its precipitation and runoff may decrease by about 13 and 30 percent, respectively. If this watershed is typical of the others within the New York City water supply system, the system's managers should consider implementing mitigation and adaptation strategies in preparation for the worst of these possible future conditions.     

Regional Perspectives on Resource Policy: Implementing Sustainable Management in New Zealand

In 1991, New Zealand implemented new legislation to govern the management of natural resources and the environment. The Resource Management Act establishes sustainable management as the guiding principle for decisions in respect of the allocation and use of natural resources. The reform has also brought about the devolution of decision-making authority from central government to the local level. Underlying this shift to a 'bottom up' decision-making framework is the belief that it is communities of interest that should have the most direct voice in the allocation and use of natural resources. Regional policy statements will be amongst the most important mechanisms through which the principle of sustainable management will be implemented at the local scale. A sample of these policy documents is reviewed, with the aim to identify what specific regional interpretations are given to the principle of sustainable management, what particular resource management issues are considered to underpin the achievement of the principle and to identify what visions have been crafted for the future. An underlying objective was to identify whether characteristics of locality have influenced the interpretations of sustainable management.     

Neighbourhood - Open Space Relationships in Metropolitan Planning: A look across four scales of concern

New Urbanism and other metropolitan planning strategies may discount the importance of neighbourhood - open space relationships when dealing with some types of open spaces, particularly in city centre and urban fringe areas. In this paper I review a series of studies I have carried out over the past decade looking at people's perceptions and uses of urban open space. This research examined neighbourhood - open space relationships in the metropolitan area of Chicago, Illinois, USA at four scales of concern: quasi-public space within an immediate neighbourhood; a public park that spans different neighbourhoods; regional greenways; and a metropolitan bioreserve. In all of this work, my findings show how adjacent neighbourhoods are critical to the success of these open spaces, regardless of their scale. Lessons are drawn from each scale for how neighbourhood - open space relationships might be improved.     

The use of GIS for monitoring and predicting urban growth in east and west St Paul,Winnipeg, Manitoba,Canada

Most urban growth in Canada occurs in the urban-rural fringe. The increasing dispersal of the Canadian urban population is due to centrifugal forces pulling urbanites past the suburbs into the surrounding exurban communities. Most Canadian urban centres are located on prime agricultural land. Exurban sprawl devours an inordinate amount of the better agricultural land. The growth around the city of Winnipeg is a case in point. Within Winnipeg's urban field are the rural municipalities of East and West St Paul. The objective of this study is to investigate the impact of urban growth on the agricultural land of these RMs as well as the rate of urban growth in both Municipalities based on database analysis using aerial photographs taken in 1960 and 1989 and Geographic Information System (GIS). East St Paul was found to have a higher rate of urbanization (from 10.14% to 43.75%) between 1960 and 1989 than West St Paul (from 7.36% to 23.57%). The growth prediction using Markov probability chain analysis showed that East St Paul will henceforth experience a reduced rate of increase than West St Paul. The rate of urbanization for both RMs is found to be comparable with areas surrounding other major cities such as Toronto. The largest increases in urban land use categories occurred in and around the existing exurban settlements. It was found that most urbanization take place on the most fertile soil.     

The challenges of sustainability in mining regions: The coal mining region of Santa Catarina, Brazil

Throughout history, mining communities have invariably found themselves striving for a good quality of life and a long‐term future. In the 21st century, problems of maintaining the economic vitality of mining regions are now compounded by concerns about the biophysical integrity of the local environment. In regions of the world where the economic viability of the resource is marginal and achieving a reasonable quality of life is a daily struggle, sustainable mining may seem to be a dubious prospect at best. Yet the twin imperatives of global political forces and burgeoning environmental concerns are requiring industry, governments and other interests to re‐conceptualize the way in which mining takes place in communities. Although mining itself may not be seen as an industry that contributes to the achievement of environmental objectives, it could — with careful planning — be used as a tool to foster a more sustainable and healthier community. This argument is considered in the context of the coal mining region of Santa Catarina, Brazil.     

城市新区都市旅游开发实证研究——以宁波市鄞州新城为例

我国城市化日益加快,但众多城市新区在建设和发展过程中其旅游功能尚未完全发挥出来。城市新区在建设过程中会创造众多的旅游资源,如商贸街区、标志性建筑或景观、文化场馆、体育场馆等,它们对本地市民和外来游客均具有一定的观赏、游憩、商贸和文化价值。鄞州新城作为我国东南沿海城市新区建设的代表,具有发展都市旅游得天独厚的资源和区位条件。对其都市旅游的现状及存在问题进行了细致分析,提出打造都市RBD、引入低碳旅游、植入文化元素、增加购物比重等对策与措施。     

Sustainable development principles for the disposal of mining and mineral processing wastes

This paper examines the minerals industry's response to sustainable development in the area of waste disposal and argues that leadership and guidance are still needed to forge collective agreement on norms and standards of practise. To encourage further debate, the paper develops a set of sustainable development principles for the disposal of mining and mineral processing wastes, and discusses the implications for current and future practise. In practise, the principles can guide waste disposal decisions through the consideration of what risk and magnitude, in any given local context, a particular management solution poses to their application. The sustainability challenge in the management of tailings and waste rock is to dispose of material, such that it is inert or, if not, stable and contained, to minimise water and energy inputs and the surface footprint of wastes and to move toward finding alternate uses. Future trends in mining and processing may compound the challenges of waste management, as lower ore grades increase the ratio of waste produced for a given unit of resource, and emphasise the urgency and need for the industry to adopt new approaches. New technologies and innovations, such as thickened tailings, dry stacking and paste backfill, have greatly increased the waste disposal methods available to meet the future challenges to sustainable development.     

国内外绿色创新与发展研究动态综述

创新和绿色已经成为今后驱动经济转型的两个最重要的因子。从绿色创新发展的资源环境维度、经济社会文化维度出发,以区域绿色创新与发展为主线,按照文献的发展脉络与逻辑关系,旨在系统梳理区域绿色创新的微观影响因素与过程,分析绿色发展问题的内涵与演变。绿色创新发展来自于多重因素与制度在生产、扩散和使用新知识与新技术等方面的相互作用,而绿色发展的最终目的是有限资源条件下的可持续现代化与城市转型。在国内外的绿色实践中,总结了能源可持续利用、节能服务业与低碳城市建设等研究的前沿问题。     

Transportation energy in global cities: sustainable transportation comes in from the cold?

The energy, environmental and social benefits of sustainable transportation, i.e. public transit, biking and walking, have long been recognized but are now mainstream in global and local transportation policy debates. However, the economic value of sustainable transportation has always been seen as secondary, unless many external costs were included. The results of a new global study show that cities with significant sustainable transportation systems have reduced costs on road construction and maintenance; better operating cost recovery and fuel-efficiency; fewer road accidents and less air pollution. In overall terms, the percentage of city funds going to transportation is reduced. The data show that cities with the most roads have the highest transportation costs and the most rail-oriented cities have the lowest. Further, the most sprawling cities have the highest direct and indirect costs for transportation. Thus, strategies to contain sprawl, to reurbanize, to build new rail systems into car-dependent suburbs with focussed sub-centers, and to facilitate biking and walking, not only will improve energy efficiency but will reduce costs to the economy of a city. Strategies that build freeways and add to sprawl will do the opposite. Trends indicate that moves toward sustainable urban patterns are beginning. The need to operationalize sustainable transportation strategies in planning and engineering practice and in the politics of infrastructure funding remains a major challenge. Some cities are showing how this can be done.