Arquitetura e urbanismo

COVID-19 initially spread among prominent global cities and soon to the urban centers of countries across the globe. While cities are the hotbeds of activities, they also seem highly exposed to global risks including the pandemic. Using the case of COVID-19 and the World Risk Index framework, this paper examines if the leading cities from the global south are inherently vulnerable and exposed to global risks and can they exacerbate the overall risk of their respective nations. Compared against their respective national averages, most of the 20 cities from 10 countries analyzed in this paper, have higher exposure, lower adaptive capacity, higher coping capacity and varied susceptibility. As this relative understanding is based on respective national averages which are often lower than the global standards, even high performance on certain indicators may still result in elevated predisposition. This paper concludes that the leading urban centers from the global south are highly likely to be predisposed to global risks due to their inherent vulnerability and exposure, and many of the drivers of this predisposition are related to the process of urbanization itself. This predisposition can enhance the overall exposure and vulnerability of the nation in which they are located.

Este trabalho parte dos estudos sobre o espaço de Gaston Bachelard e Gilbert Durand, para esboçar os grandes contornos do imaginário do que foi a construção da cidade de Brasília. Trata-se assim de compreender o significado da construção não a partir das circunstâncias históricas mas a partir do significado simbólico das imagens criadas durante o período da construção, ou seja, entre 1956 e 1960. Do conjunto dos agentes produtores de imagens sobre Brasília, nos limitamos àquelas produzidas pelo ex-Presidente Juscelino Kubitschek, Lúcio Costa e Oscar Niemeyer. Estas são analisados tendo como ponto de partida a questão de como o espaço foi concebido e apropriado pela nova cidade.

What can the Participatory Budget (PB) teach us about slum upgrading in the cities of the Global South? This article describes the process of slum upgrading via PB in Porto Alegre, Brazil. Participatory budgeting (PB) is a renowned mechanism of resource allocation that transfers decision-making power over the capital expenditure portion of the municipal budget from the City Council to public assemblies. However, the impact of PB on municipal service delivery in general and housing in particular is understudied. Ethnographic findings are based on slum upgrading process via PB in an informal settlement in the East District of Porto Alegre. Fieldwork included 16 interviews with residents who had been PB delegates, PB councilors, municipal architects, lawyers, and the social worker involved in the slum upgrading project of Vila Radiante, East District. Furthermore, analysis of district-level expenditures on public works required for slum upgrading as well as analysis of site plans informed the conclusions. The Porto Alegre PB demonstrates that slum dwellers' involvement in all stages of the slum upgrading process, from resource allocation to service delivery, contributed to the effective distribution of housing and basic infrastructure. Slum dwellers are a heterogeneous group with diverse housing needs. Housing via PB addresses this diversity and provides an alternative to the dichotomist debate in international planning between, on one hand, slum clearance followed by public housing projects and, on the other, the promotion of assisted self-help housing through programs of land tenure and basic infrastructure provision.

The employment of means for efficient use of water and energy are being increasingly incentivized, in relation to the sustainability of buildings. In Brazil, there is much concern regarding the difficulty of getting low-income segments of the population to adopt energy-saving technologies. This study provides guidelines for the inclusion of manufactured, low-cost solar water heaters (LCSWH) in low-income housing in combination with environmental education of this segment of the population. Therefore, a group of dwellings located in a low-income community in Campinas SP, Brazil, was selected for installation of LCSWHs, which were assembled and installed by the study population itself, who also participated in environmental awareness workshops. Particularly apparent in the results obtained, was a tendency to reduce energy consumption by using the LCSWH, attributable in part to behavioral changes from environmental awareness; and that the planning, application or organized systematization of knowledge is feasible in low-income housing, provided it is not promoted solely by dependency culture, since the objective is to provide an instrument for self-discovery, mobilization and participation by the population.

Slum identification and mapping are fundamental to support public policies. However, slum data is affected by differences in definition, identification, spatial delimitation, sample and data collection periods. This study compares slum maps in Sao Mateus (a peripheral region of Sao Paulo city) from the 2010 demographic census and the Sao Paulo municipal government. The census and the municipal basemaps and orthophotos were overlaid in a Geographic Information System (GIS) to evaluate their similarities and differences, the reasons for inconsistencies between them. Of the 68 districts with subnormal agglomerates (EDSAs; special enumeration districts for slum areas in the Brazilian demographic census), 59% are in the categories ‘high coincidence’ or ‘partial coincidence’ with the perimeters of favelas (the main type of slum in Brazil) delineated by the Sao Paulo municipal government; the names of the residential area (favela/EDSA) are the same in only 51.5% of the subnormal agglomerates, while 26.5% of the EDSAs include residential areas not considered favelas by the municipality. Many Brazilian researchers state that the underestimation of EDSA census data is accentuated by the exclusion of favelas smaller than 51 dwellings from the census. However, at least in Sao Mateus, the exclusion of small favelas (3.6%) was not the only reason for census underestimation of favelas.

Upgrading existing social housing (SH) requires user-centred participatory processes to promote values. Comparative case studies in Brazil, Germany, the Netherlands, and the UK are presented. Living Labs (LLs) were conducted for the delivery of user values and to promote an informed decision-making process. Tools and LL activities were tested to engage stakeholders in the upgrading process, support the co-creation of solutions and address social and societal challenges. The main research aims were to facilitate SH upgrading processes focusing on the delivery of value for users, achieving end-user empowerment, as well as assessing participatory decisionmaking through LLs. Research goals were achieved in each case study setting. The evaluation of specific cases informed a conceptual framework and guidelines to facilitate upgrading through LLs in varied SH landscapes.

This paper is about changes in people's perceptions relating to security of land tenure in Recife, Brazil. This paper investigates why people living in contested settlements invest and consolidate their houses despite the apparent lack of land tenure security. The question is very simple, but the answer is highly complex. Although the topic has been widely researched, there is still insufficient understanding of what security means to individual households, and how security influences the consolidation and improvements of houses. Households invest in all kinds of processes and commodities to improve their plots, and their houses, and inevitably this changes their perceptions of security. Data were mainly gathered from in-depth interviews held with a total of 63 households living in five different informal settlements in Recife. The paper focuses on the informal claims made by households about their perceived rights over their property, since for the great majority of the households living in these settlements, property rights in the form of title deeds are not available. The key aspects highlighted in this papers are that (1) the lack of a better understanding about what tenure really means to low-income households can pose threats to the survival of low-income housing markets, and (2) contrary to orthodox knowledge, the paper contends that perceptions of tenure security increase as a result of housing consolidation.

This paper presents a study on quality of life and sustainability indicators relating to site-planning parameters for low income public housing projects in the region of Campinas, Brazil. The study is based on a post-occupancy-evaluation (POE), conducted in five housing developments. Most of these housing projects are based on a repetitive model and are devoid of urban infrastructure. Users act on their own in providing for some elements considered necessary to create an identity and community spirit. Results show that the population relates quality of life to economic factors and sustainability is associated to reduce utility bills. Houses are preferred to apartments and satisfaction with the present housing conditions is high, despite low feelings of security in the neighbourhood. This work is part of a broader study, which aims to develop design evaluation tools. Most sensitive quality of life and sustainability indicators related to site-planning should permeate these tools and establish design guidelines. The inclusion of a large number of qualitative design issues into the decision-making process and the questioning of existing standardized solutions are seen as essential means to increase local housing quality.

This paper evaluates a technical assistance program for house self-builders in the region of the city of Campinas, Brazil. The assistance given is in the form of an individualized house design, distributed to selfbuilders, based on an automated computer aided design (CAD) generated design method. A case study is used to demonstrate the efficacy of the assistance program. The transfer process of a population from an environmental protection area to a new location and their need for rapid house construction is the specific case presented. Houses are evaluated as to satisfaction and environmental comfort conditions. As a result, lessons are learnt about assistance programs and their success in improving housing quality.

Experiences of state/community partnerships in the field of land and housing in developing countries have had mixed results in attaining their goals of improving access to shelter for low-income households. Drawing upon evidence from Porto Alegre, Brazil, this paper argues that partnerships may represent an opportunity when the relationship is based on accountability and transparency, on common goals and shared responsibilities, even when resources are scarce. The role of the public partner was to provide technical and organizational assistance and act as a mediator between coops and private interests. The role of the cooperatives was to mobilize as a cooperative and develop a savings and organizational capacity. The partners carried out these roles and developed new ones during the construction of the partnership. The partnership however was not exempt from difficulties. Besides frictions between state officials and cooperators and among types of cooperatives, external constraints jeopardized the development of the organizations. Land use restrictions, lack of access to construction finance and lack of a supportive legislative and policy framework still constitute shortcomings for the development of low-income housing cooperatives in Brazil.