Urban design has splintered into increasingly narrow specialist disciplines since the mid Twentieth Century. Traffic engineers, statutory planners, civil engineers, landscape architects and architects each make specific but isolated contributions to urban design frameworks. Each consultant documents their position predominantly through text and two dimensional representations, occasionally with specious perspective images produced by a hand rendering specialist. This fragmented and sequential design approach inadequately addresses contemporary urban agendas, practice constraints or the potential of digital design techniques, particularly in light of increasing fears of an imminent environmental crisis and peak oil, and concerns for health, amenity and accommodating an increasingly urbanised population. The aim of my thesis is to identify and address disparities between contemporary urban design practice and society's prevailing urban agendas for integrated and sustainable cities. The hypothesis tested by my thesis is that the gulf between prevailing urban agendas of society and urban design can be reduced by developing a 'defragmented' design approach that uses rapid, parametric, four-dimensional, digital analysis and design techniques, which build upon software commonly available within the industry. This hypothesis has been tested in four ways: firstly through the analysis of urban agendas, design techniques and urban design paradigms, in both historic and contemporary contexts; secondly by identifying currently available technologies with the potential for adaptation and customisation; thirdly by development of new digital techniques; and finally by testing this defragmented approach on both simplified models and various case studies within an urban design practice as part of the embedded research program. Techniques I have developed and tested as part of the approach fit into four categories: firstly pedestrian connectivity - walkability and accessibility; secondly daylight amenity assessment; thirdly visual impact analysis assessing urban form visualisation, generation and composition; and finally feasibility modelling, including linked data yield analysis. I have evaluated the success of the approach in these studies with regard to practice constraints (time and budget) and contemporary society's pr evailing urban agendas. My rapid, defragmented design approach has resulted in new techniques shown to be used quickly and concurrently 'in-house' contributing to the urban design process, whilst meeting fee budgets and project deadlines. I have demonstrated that issues that are currently difficult to solve using the constraints of conventional planning techniques can be addressed more effectively than they are currently, whilst avoiding the considerable expense of specialised hardware/software or the appointment of additional consultants. My thesis concludes that the rapid, defragmented approach can demonstrably yield more synergistic urban design responses. The inherently flexible approach can be tailored for a myriad of different urban design scenarios, as well as potentially other disciplines. The defragmented approach can expand the realm of urban designers and increase their contribution in the generation and advocacy of sustainable planning policy and reduce the disparities between contemporary urban design practice and society's need for integrated and sustainable cities.

Master of Landscape Architecture / Department of Landscape Architecture/Regional and Community Planning / Stephanie A. Rolley / Once a standalone town on the periphery of Denver, Littleton is now completely surrounded by other cities on all sides. Much of northeast Littleton is experiencing many of social and demographic issues associated with an aging suburb. Buildings are showing signs of age and neglect and the area has higher incidences of crime, gang activity, drugs, and graffiti than the rest of Littleton. Because it cannot expand outward, the City of Littleton must look at ways to redevelop within its city limits. This study focuses on achieving service in an infill development in northeast Littleton, Colorado. Research about the urban design was conducted and case studies of were documented. A program was written based on the research and a thorough inventory and analysis of existing site conditions. Based on the program, structures and site elements were located in northeast Littleton based on the principles of Sustainable Urbanism. The design achieves service through the Sustainable Urbanist principles of defined center and edge, compactness, completeness, connectedness, and biophilia. Because the design is focused on achieving service, not strictly on the placement of buildings within an urban framework according to a design style, the result is a community that is able to support local business and mass transit through walkability, increased density, and outside connection.

I conducted a case study analysis of Dubai, exploring multiple urban design tactics for a more sustainable development approach to Dubai’s pattern of development. Particularly, this dissertation identifies sustainable urban form design principles and strategies for a Dubai neighborhood. The research addresses the question: which form-based urban design strategies effectively deliver greater environmental, social, and economic coherence in Dubai’s neighborhood development? In addition, this research addresses the question of whether certain urban form design principles contribute comparatively more than others to sustainability. I used two rounds of the Delphi technique, a structured communication technique utilizing multiple rounds of questioning, to obtain experts’ knowledge and opinions to redefine urbanism in Dubai towards more ecological and social responsive practices. My analysis of the Delphi reveal that in Dubai, the most sustainable neighborhoods are those emphasizing more public participation in the initial planning process, i.e., connectivity and multiple transportation options; adequate diversity; green, open, and social nodes in the urban fabric; culturally-relevant urbanism and architecture; climate-sensitive urbanism and architecture; eco-balanced design applications; and adaptability, all integrated with one another in the compactly arranged urban fabric. Approaches to sustainable development must stress elements other than just design itself, such as grasping the nuances of the cultural traditions, politics, and implementation constraints. Therefore, this research also involved collecting survey responses from local and expatiate residents in Dubai and interviewing Dubai government officials in order to identify and to understand the relevant political and cultural aspects as well as obstacles associated with the experts’ design recommendations. In particular, survey responses were used to: (1) identify the public opinion surrounding some of the Dubai neighborhood design ideas suggested by an international and local panel of experts; and (2) understand how the public value and prioritize the suitability of the proposed design strategies to Dubai’s cultural environment. Interviews with the local authorities in Dubai facilitated (1) the determination of troublesome challenges and constraints for implementing some of the urban design strategies defined by experts in the Delphi; and (2) identification of implementation opportunities and possible policy initiatives that might support the implementation of the proposed strategies. I also synthesized all research data to identify areas of overlap and disagreement among research participants (the experts, public, and government officials). Finally, the last chapter discusses two major obstacles challenging different aspects of sustainability. I also detail a potential solution to prevail over the challenges, and introduce potential areas of future research. / text

Dry weather dominates several U.S. states, and some of them experience even long-term droughts. Yet, more than 10.6 million swimming pools exist in the U.S., and over 43,000 of them are in greater Los Angeles. Since roughly 100% of their water evaporates on a yearly basis, pool water evaporation accounts for a significant amount of water being wasted every day. Several studies have been conducted to create a proper equation for the evaporation rate on a pool surface, based on the wind speed, water temperature, and relative humidity. This thesis will address a research gap that was found in exploring the way the surroundings of the pool can affect its evaporation rate. In particular, this study examines the relation of the urban design to the evaporation rate of outdoor swimming pools by studying the way the housing type of a neighborhood affects the wind speed over the neighborhood’s pool surfaces.

The United States government has taken steps to assure underprivileged citizens housing in the form of public housing through the Department of Housing and Urban Development, as well as various humanitarian programs in the form of homeless shelters. Yet, all housing is not equal. Our freedom to choose where we live and what type of house we live in is one revered aspect of life as a United States citizen. We can express our individuality, creativity, and personality through the architectural style of our homes. In this sense it is hard to ask for equal housing. I am suggesting that equality comes from adequate access to social participation, social integration, and power, in other words social inclusion. (Room, 7) Investigating and correcting the causes of social exclusion in order to create social inclusion is necessary in order to ascertain equality of housing in America. Sir Winston Churchill once said, “We shape our buildings and afterward our buildings shape us.” (Gieryn, 35) But what happens when you do not have power over the shaping of your own building? Is your building still a reflection of yourself? And if we allow building to include the environment in which your home is located, what if previous use of the land left it degraded? Will the degradation shape you? My thesis considers the question: does the environmental quality and architectural style of public housing in the United States facilitate the social exclusion of these communities? If so, what best practices can we take away from models that have been successful at combatting social exclusion? By answering these questions I strive to develop a proposal to right this currently unjust situation.

The integration of cogeneration technologies in residential communities has the potential of reducing energy demand and harmful emissions. This study investigated the impact of selected design parameters on the environmental and economic performances of cogeneration systems integrated into residential communities in cold U.S. climates following a centralized or a decentralized integration approach. Parameters investigated include: 1) density, 2) use mix, 3) street configuration, 4) housing typology, 5) envelope and building systems' efficiencies, 6) renewable energy utilization, 7) cogeneration system type, 8) size, and 9) operation strategy. Based on this, combinations of design characteristics achieving an optimum system performance were identified. The study followed a two-phased mixed research model: first, studies of residential community design and three case studies of sustainable residential communities were analyzed to identify key design parameters; subsequently, simulation tools were utilized to assess the impact of each parameter on cogeneration system performance and to optimize the community design to improve that performance. Assessment procedures included: developing a base-line model representing typical design characteristics of U.S. residential communities; assessing the system performance within this model, for each integration approach, using three performance indicators: reduction in primary energy use, reduction in CO2 emissions; and internal rate of return; assessing the impact of each parameter on the system performance through developing 46 design variations of the base-line model representing changes in these parameters and calculating the three indicators for each variation; using a multi-attribute decision analysis methodology to evaluate the relative impact of each parameter on the system performance; and finally, developing two design optimization scenarios for each integration approach. Results show that, through design optimization, existing cogeneration technologies can be economically feasible and cause reductions of up to 18% in primary energy use and up to 42% in CO2 emissions, with the centralized approach offering a higher potential for performance improvements. A significant correlation also existed between design characteristics identified as favorable for cogeneration system performance and those of sustainable residential communities. These include high densities, high mix of uses, interconnected street networks, and mixing of housing typologies. This indicates the higher potential for integrating cogeneration systems in sustainable residential communities.

Sustainable Built Environments Senior Capstone / This Capstone looks into the aspects of planned communities that are successful in reducing the need for automobile usage among residents. / The goal of this study is to assess automobile use in sustainably developed communities and note the ways in which these communities successfully reduce the need for personal automobiles. In response to research about the environmental and health effects of urban sprawl, developers have pushed for sustainably developed communities. These master plan communities follow particular guidelines and set goals to alleviate their effect on the environment and help reduce the negative effects of sprawling development. Because auto-dependency is a sign of sprawl, it is important that these communities develop in such a way that reduce citizens’ reliance on personal automobiles. This study will examine three separate master planned communities in the Tucson region and assess how each one addresses the issue of automobile usage, examining common factors between the different communities and what factors make these communities successful. This study found that several factors are important in reducing automobile use. These examples of successful development will potentially help future communities be successful in reducing automobile usage.

abstract: The lack of substantive, multi-dimensional perspectives on civic space planning and design has undermined the potential role of these valuable social and ecological amenities in advancing urban sustainability goals. Responding to these deficiencies, this dissertation utilized mixed quantitative and qualitative methods and synthesized multiple social and natural science perspectives to inform the development of progressive civic space planning and design, theory, and public policy aimed at improving the social, economic, and environmental health of cities. Using Phoenix, Arizona as a case study, the analysis was tailored to arid cities, yet the products and findings are flexible enough to be geographically customized to the social, environmental, built, and public policy goals of other urbanized regions. Organized into three articles, the first paper applies geospatial and statistical methods to analyze and classify urban parks in Phoenix based on multiple social, ecological, and built criteria, including landuse-land cover, `greenness,' and site amenities, as well as the socio- economic and built characteristics of park neighborhoods. The second article uses spatial empirical analysis to rezone the City of Phoenix following transect form-based code. The current park system was then assessed within this framework and recommendations are presented to inform the planning and design of civic spaces sensitive to their social and built context. The final paper culminates in the development of a planning tool and site design guidelines for civic space planning and design across the urban-to-natural gradient augmented with multiple ecosystem service considerations and tailored to desert cities. / Dissertation/Thesis / Ph.D. Geography 2013

Established communities pursue revitalization to transform struggling downtowns into vibrant hubs and walkable neighborhoods. Vacant and underused parcels can help communities grow sustainably by using excess capacity in existing infrastructure. However, many communities experience limited urban infill activity due to persistent bias favoring low-density development at the community’s edges. In small communities perceptions and processes can favor low-density growth. Infill development can be complicated due to site conditions and neighborhood context, yet planners work with ad hoc techniques and limited staff time. There is a need for efficient ways to identify suitable sites and generate information to use for community decision-making around redevelopment. The primary aim of this research is to develop an Urban Infill Assessment Framework (UIAF). It is organized around three questions: Can the framework assess infill’s potential in a small post-industrial downtown? Is it replicable? Does the framework change how local stakeholders perceive infill potential? To answer these questions this study will develop and test a UIAF in Turners Falls, MA, then test resulting information through stakeholder interviews. The framework uses mixed-methods to integrate social values, fiscal efficiency, and spatial awareness through procedures organized in three Phases. Phase I examines quantitative and qualitative information (e.g., local planning documents, tax data, site visits, and consultations with local experts) to produce mapped context data, and local building typologies with corresponding tax yield per acre. In Phase II these components are used in scenario building, to calculate composite capacity of infill acreage and annual tax yield for defined areas. Finally, interviews with ten stakeholders test how the information influences perceptions of infill in Turners Falls. As a result of this research, planners should be able to replicate the framework. Based on preliminary results, the relevance of an infill assessment tool to planning practice is threefold: It promotes strategic land-use planning by generating information to compare development projects across diverse locations, scales, and spatial configurations. It supports structured application of concepts uniquely suited to managing urban environments. Improved redevelopment tools and expertise can offset procedural and perceptual factors that favor low-density growth and sprawl.

A percepção viabiliza a obtenção de diversas informações visuais do ambiente que, entre outras funções, auxilia o indivíduo a se orientar no espaço. No período noturno, a iluminação urbana assume importante papel para o funcionamento das cidades, podendo contribuir para a qualifi cação dos ambientes. Este trabalho aborda a percepção sobre a qualidade do sistema de iluminação de uma praça municipal em Porto Alegre - Praça Dr. Adair Figueiredo - visando compreender as variáveis envolvidas, as possíveis relações entre elas e suas relações com o perfi l do respondente. A avaliação da percepção da qualidade do sistema de iluminação da praça foi realizada por possíveis usuários e pela autora do trabalho. Foi aplicado questionário on line com uma amostra de 283 pessoas, composto por questões de escala de valores para medir as variáveis relacionadas à qualidade do sistema de iluminação e perguntas fechadas para obtenção de dados de perfi l e opinião. Os resultados foram analisados utilizando-se métodos estatísticos como médias e variâncias das variáveis contínuas, análise de correlações de Pearson, teste de qui-quadrado, teste exato de Fisher, MANOVA, Post Hoc de Tukey. Foi realizada observação assistemática pela autora, registrada e analisada através de mapeamento visual e descrição textual, considerando-se as categorias de análise do referencial teórico. Os resultados apontam que todas as variáveis envolvidas na qualidade de iluminação estão correlacionadas positivamente, com médias amostrais apresentando 80,31% de satisfação geral com a qualidade do sistema de iluminação da praça, e também que é desejável a continuidade em investimentos no sistema de iluminação. A análise multivariada revela que o componente denominado “referências espaciais” é mais valorizado pelas faixas etárias acima de 41 anos do que a faixa etária de 31 a 40 anos e pelas pessoas acima de 51 anos em relação à faixa etária de 21 a 30 anos. / Perception makes it possible to obtain a diversity of visual information about the environment, which, among other functions, helps the individual to orient himself in space. In the night period, urban lighting plays an important role for the functioning of cities, and can contribute to the qualifi cation of the environments. This work approaches the perception about the quality of the lighting system of a city square in Porto Alegre - Dr. Adair Figueiredo Square- aiming to understand the variables involved, the possible relations between them and their relations with the profi le of the respondent. The square’s f lighting system quality evaluation’s was carried out by possible users and by the author of the work. An online questionnaire was applied with a sample of 283 people, composed of scale value’s questions to measure the variables related to the quality of the lighting system and closed questions to obtain data of profi le and opinion. The results were analyzed using statistical methods such as means and variances of continuous variables, Pearson correlation analysis, chi-square test, Fisher exact test, MANOVA, Tukey Post Hoc. An asystematic author’s observation was recorded and analyzed through visual mapping and textual description, considering the categories of analysis of the theoretical reference. The results indicate that all variables involved in lighting quality are positively correlated, and has sample average presenting 80.31% overall satisfaction with square’s lighting system quality, and also that it is desirable to continue investments in the lighting system. The multivariate analysis reveals that the factor “spatial references” is more valued by the age groups over 41 years than the age group of 31 to 40 years and by the people over 51 years of age in relation to the age group of 21 to 30 years.