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7295 KiB

Open AccessArticle

Limits—Urban Density and Mobility Networks in West Berlin during the Period of Containment

by Vanessa Miriam Carlow

Sustainability 2014, 6(10), 7452-7465; https://doi.org/10.3390/su6107452 - 23 Oct 2014

Cited by 4 | Viewed by 8849

Abstract

If space may be conceptualized as a natural resource, much like gas, oil, or minerals, then its production and use can also be thought of as something to be properly managed, taken care of, and not wasted. Limiting the expansion of the footprint [...] Read more.

If space may be conceptualized as a natural resource, much like gas, oil, or minerals, then its production and use can also be thought of as something to be properly managed, taken care of, and not wasted. Limiting the expansion of the footprint of built-up land in urban areas forces this particular resource (space) to be used more efficiently—in a sense, compelling it to be more creative and productive. These spatial constraints on urban areas generate different kinds of densification processes within the existing city, propagating densification, and with it new patterns and uses in urban development, as well as novel approaches to mitigating the hazards of dense urban environments. This paper examines the case of how spatial containment in West Berlin during the period of the Berlin Wall (1961–1989) produced such outcomes. West Berlin during this period can be considered a unique case of spatial containment, where a relatively large and vibrant modern city had to work around a clear and indelible limit to its physical expansion. This paper will discuss ways in which the containment influenced patterns of development in West Berlin toward densification and connectivity, focusing on the expansion of its infrastructural networks, and discuss the development of a new building culture around transformation and densification, including hybrid architectures and mitigation devices to deal with difficult sites produced by the densification. Full article

(This article belongs to the Special Issue Density and Sustainability)

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10587 KiB

Open AccessArticle

Understanding Density in an Uneven City, Santiago de Chile: Implications for Social and Environmental Sustainability

by Felipe Livert Aquino and Xabier Gainza

Sustainability 2014, 6(9), 5876-5897; https://doi.org/10.3390/su6095876 - 2 Sep 2014

Cited by 40 | Viewed by 12687

Abstract

Efforts to promote infill development and to raise densities are growing in many cities around the world as a way to encourage urban sustainability. However, in cities polarized along socio-economic lines, the benefits of densification are not so evident. The aim of this [...] Read more.

Efforts to promote infill development and to raise densities are growing in many cities around the world as a way to encourage urban sustainability. However, in cities polarized along socio-economic lines, the benefits of densification are not so evident. The aim of this paper is to discuss some of the contradictions of densification in Santiago de Chile, a city characterized by socio-spatial disparities. To that end, we first use regression analysis to explain differences in density rates within the city. The regression analysis shows that dwelling density depends on the distance from the city center, socioeconomic conditions, and the availability of urban attributes in the area. After understanding the density profile, we discuss the implications for travel and the distribution of social infrastructures and the environmental services provided by green areas. While, at the metropolitan scale, densification may favor a more sustainable travel pattern, it should be achieved by balancing density rates and addressing spatial differences in the provision of social services and environmental amenities. We believe a metropolitan approach is essential to correct these spatial imbalances and to promote a more sustainable and socially cohesive growth pattern. Full article

(This article belongs to the Special Issue Density and Sustainability)

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3513 KiB

Open AccessArticle

Sustainable Urban Biophilia: The Case of Greenskins for Urban Density

by Grant Revell and Martin Anda

Sustainability 2014, 6(8), 5423-5438; https://doi.org/10.3390/su6085423 - 19 Aug 2014

Cited by 18 | Viewed by 16283

Abstract

Green infrastructure ameliorates the urban heat island effect, contributes positively to liveability and enables sustainability in higher density urban environments. Greenskins (living architectures) are a more specific form of green infrastructure, including green walls and green roofs, for dense urban areas. These offer [...] Read more.

Green infrastructure ameliorates the urban heat island effect, contributes positively to liveability and enables sustainability in higher density urban environments. Greenskins (living architectures) are a more specific form of green infrastructure, including green walls and green roofs, for dense urban areas. These offer a new approach for sustainable urban biophilia and some forms can be built using the ecological design principles of constructed wetlands. The paper compares findings from two urban centres in warm Mediterranean climates. In general from Adelaide, South Australia and more specifically from university collaborative projects on particular technical and social parameters necessary to sustain Greenskins in dense urban conditions in Fremantle, Western Australia. Results from trials of a prototype greywater Greenskin using vertical constructed wetland cells are reported. Through an experimental investigation of designing living green walls in urban Fremantle, this paper challenges the conventional “triple-bottom-line” approach to sustainable dense urban systems by addressing the greater aesthetic needs of sustainability and its thinking. Here landscape aesthetics looks to the collaborative fields of urban design, environmental engineering and landscape architecture to design new urban biophilic experiences and restorative landscapes for regenerative cultural pleasure, ecological responsibility, environmental stewardship and intellectual gain. Full article

(This article belongs to the Special Issue Density and Sustainability)

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2096 KiB

Open AccessArticle

Densification without Growth Management? Evidence from Local Land Development and Housing Trends in Charlotte, North Carolina, USA

by Elizabeth C. Delmelle, Yuhong Zhou and Jean-Claude Thill

Sustainability 2014, 6(6), 3975-3990; https://doi.org/10.3390/su6063975 - 20 Jun 2014

Cited by 47 | Viewed by 9778

Abstract

In urban America, land development and residential real estate have passed through a number of different phases during the post-WWII era. In contemporary discourse on urban sustainability, attention is often expressed in terms of intensity of land development, lot sizes, and square-footage of [...] Read more.

In urban America, land development and residential real estate have passed through a number of different phases during the post-WWII era. In contemporary discourse on urban sustainability, attention is often expressed in terms of intensity of land development, lot sizes, and square-footage of housing units. In this paper, we reconstruct the land development trajectory of a rapidly growing southern city in the United States and assess whether this trajectory has experienced any reversal in the face of socio-economic transformations that have occurred over the past decade or so. Starting with current land and real estate property records, we reconstitute the urban map of Charlotte using World War II as a starting point. Results highlight a decline in the average single family lot size over the past decade, while the average home size has consistently grown, suggesting that the city of Charlotte and its county have witnessed a densification trend along a path towards greater land development. This analysis both helps situate Charlotte with respect to other U.S. urban regions, and provides support for potential land-use policies, especially densification, when a balance between urban development, environment preservation, energy savings, and the achievement of quality of life for current and future generations are concerned. Full article

(This article belongs to the Special Issue Density and Sustainability)

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564 KiB

Open AccessArticle

Sustainable Urban Renewal: The Tel Aviv Dilemma

by Asaf Friedman Arch

Sustainability 2014, 6(5), 2527-2537; https://doi.org/10.3390/su6052527 - 30 Apr 2014

Cited by 13 | Viewed by 7432

Abstract

The city of Tel Aviv needs extensive urban renewal projects to answer the demand for housing. The area suitable for such a project is the older southern part of Tel Aviv, made up of small parcels of land with single units. This area [...] Read more.

The city of Tel Aviv needs extensive urban renewal projects to answer the demand for housing. The area suitable for such a project is the older southern part of Tel Aviv, made up of small parcels of land with single units. This area has undergone an extreme gentrification process, which makes assembling small parcels into large ones a very difficult task. Owners holding out for higher prices may either prevent or significantly delay socially efficient redevelopment. The only current option for the Tel Aviv Municipality that will lead to efficient land assembly for private redevelopment currently is the option of private entrepreneurship. We wish to describe a mechanism that will solve the hold-out problem and lead to efficiency in land assembly without resorting to the intervention of the government to execute eminent domain. The mechanism requires the municipality to plan the development that will best suit the city, thus allowing the valuation of the parcel to reflect its true price for the owner. If the owners are still reluctant to sell, the municipality can then tax him according to the new value of the land. Full article

(This article belongs to the Special Issue Density and Sustainability)

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532 KiB

Open AccessArticle

Understanding the Role of Built Environment in Reducing Vehicle Miles Traveled Accounting for Spatial Heterogeneity

by Chuan Ding, Yaowu Wang, Binglei Xie and Chao Liu

Sustainability 2014, 6(2), 589-601; https://doi.org/10.3390/su6020589 - 27 Jan 2014

Cited by 36 | Viewed by 8035

Abstract

In recent years, increasing concerns over climate change and transportation energy consumption have sparked research into the influences of urban form and land use patterns on motorized travel, notably vehicle miles traveled (VMT). However, empirical studies provide mixed evidence of the influence of [...] Read more.

In recent years, increasing concerns over climate change and transportation energy consumption have sparked research into the influences of urban form and land use patterns on motorized travel, notably vehicle miles traveled (VMT). However, empirical studies provide mixed evidence of the influence of the built environment on travel. In particular, the role of density after controlling for the confounding factors (e.g., land use mix, average block size, and distance from CBD) still remains unclear. The object of this study is twofold. First, this research provides additional insights into the effects of built environment factors on the work-related VMT, considering urban form measurements at both the home location and workplace simultaneously. Second, a cross-classified multilevel model using Bayesian approach is applied to account for the spatial heterogeneity across spatial units. Using Washington DC as our study area, the home-based work tour in the AM peak hours is used as the analysis unit. Estimation results confirmed the important role that the built environment at both home and workplace plays in affecting work-related VMT. In particular, the results reveal that densities at the workplace have more important roles than that at home location. These findings confirm that urban planning and city design should be part of the solution in stabilizing global climate and energy consumption. Full article

(This article belongs to the Special Issue Density and Sustainability)

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661 KiB

Open AccessArticle

Density and Decision-Making: Findings from an Online Survey

by Christopher T. Boyko and Rachel Cooper

Sustainability 2013, 5(10), 4502-4522; https://doi.org/10.3390/su5104502 - 23 Oct 2013

Cited by 8 | Viewed by 7009

Abstract

In many countries, policymakers have used urban densification strategies in an effort to create more sustainable cities. However, spatial density as a concept remains unclear and complex. Little information exists about how density is considered by decision makers, including the different kinds of [...] Read more.

In many countries, policymakers have used urban densification strategies in an effort to create more sustainable cities. However, spatial density as a concept remains unclear and complex. Little information exists about how density is considered by decision makers, including the different kinds of density and the wider political and economic context in which decisions are made: who makes density decisions, when they make those decisions and what they use to make decisions. To that end, the authors created an online survey to investigate the above issues. One hundred and twenty-nine respondents from the fields of architecture, planning, urban design and engineering answered a 26-item survey over a 3-month period. Findings suggest that decision makers consider more than just population and dwelling density and that city design, planning and policy need to address these other kinds of density. Moreover, the professions making many of the density decisions are not, necessarily, the ones that should be making the decisions; nor are they making decisions early enough. Policymakers also need to be more cognisant of the multi-scalar dimensions of density when creating policy. Finally, more needs to be done in universities to ensure that built environment students receive a broader skillset, particularly in terms of engaging with communities. Full article

(This article belongs to the Special Issue Density and Sustainability)

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723 KiB

Open AccessArticle

Greenhouse Gas Implications of Urban Sprawl in the Helsinki Metropolitan Area

by Sanna Ala-Mantila, Jukka Heinonen and Seppo Junnila

Sustainability 2013, 5(10), 4461-4478; https://doi.org/10.3390/su5104461 - 21 Oct 2013

Cited by 35 | Viewed by 9266

Abstract

Suburban households living in spacious detached houses and owing multiple cars are often seen as main culprits for negative greenhouse consequences of urban sprawl. Consequently, the effects of sprawl have been mostly studied from the viewpoints of emissions from home energy consumption and [...] Read more.

Suburban households living in spacious detached houses and owing multiple cars are often seen as main culprits for negative greenhouse consequences of urban sprawl. Consequently, the effects of sprawl have been mostly studied from the viewpoints of emissions from home energy consumption and private driving. Little attention has been paid to the changes in other consumption. In this paper, urban sprawl is linked to the proliferation of semi-detached and detached housing, described as a low-rise lifestyle, at the expense of apartment house living i.e., high-rise lifestyle. We analyze differences between the low-rise and the high-rise lifestyles and their environmental effects in the Helsinki Metropolitan Area, taking into account all consumption activities. Environmental effects are assessed by combining greenhouse gas intensities from a consumption-based environmentally-extended input-output (EE I-O) model with expenditure data. Then these carbon footprints are further elucidated with regression analysis. We find that low-rise lifestyles causes approximately 14% more emissions than high-rise lifestyles. However, the relative contributions of emissions from different sources, whether direct or indirect, are almost equal for both. Furthermore, when controlling the level of expenditure, the differences between the two lifestyles unexpectedly disappear and in certain cases are even reversed. We believe that our consumption-based approach facilitates the understanding of sprawling lifestyles and offers important insights for sustainable policy-design and urban planning. Full article

(This article belongs to the Special Issue Density and Sustainability)

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3767 KiB

Open AccessReview

Density, the Sustainability Multiplier: Some Myths and Truths with Application to Perth, Australia

by Peter Newman

Sustainability 2014, 6(9), 6467-6487; https://doi.org/10.3390/su6096467 - 25 Sep 2014

Cited by 26 | Viewed by 14191

Abstract

The paper suggests that the divisive urban issue of density has critical importance for sustainability. It is particularly important to resolve for the low density car dependent cities of the world as they are highly resource consumptive. Ten myths about density and 10 [...] Read more.

The paper suggests that the divisive urban issue of density has critical importance for sustainability. It is particularly important to resolve for the low density car dependent cities of the world as they are highly resource consumptive. Ten myths about density and 10 truths about density are proposed to help resolve the planning issues so commonly found to divide urban communities. They are applied with data to Perth to illustrate the issues and how they can be resolved. Full article

(This article belongs to the Special Issue Density and Sustainability)

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