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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Evaluation of scrap tire-derived porous rubber tubing as a green membrane for sustainable water filtration (ECOL-Mem process)

Garcia, Ana Maria 01 June 2007 (has links)
Increasing population and extensive urbanization have strained resources around the world, promoting water scarcity and solid waste accumulation. Addressing the issues of access to safe drinking water and basic sanitation in developing countries is challenging due to limited technological and financial resources. Therefore, it is imperative that durable, low-cost, and sustainable technologies are developed to help alleviate these problems. At the same time, the production of solid waste has increased and includes waste tires, which pose a health and environmental hazard. Although efforts have been made to develop new markets for recycled scrap tires, a vast majority are still being stockpiled or landfiled. This study aims to evaluate a water treatment system that addresses the problem of access to safe drinking water and sanitation, while providing a new market for recycled scrap tires. The system, termed ECOL-Mem, utilizes commercially available porous rubber tubing (PRT), which is marketed for drip irrigation purposes. To our knowledge, this is the first time this product has been used in a water treatment system. The PRT is manufactured through a hot extrusion process and contains 65% recycled crumb rubber and a binder (e.g. polyethylene). The proposed configuration simulates a hollow fiber membrane filtration system driven by a vacuum that operates inside-out. The system was first tested using clean water to obtain intrinsic characteristics. It was then tested using bentonite and sludge solutions that simulated impaired source water. For the case of a bentonite solution containing 700 mg/L, 20L of permeate could be obtained in one hour while the total solids removal remained around 20%. In order to improve the water quality, a flocculation-enhanced filtration phase was explored. The flocculant is chitin, a biopolymer that can be derived from waste shellfish. Upon addition of the chitin, between 60% and 70% of total solids removal could be obtained for different feed waters. Although optimization is needed, the PRT system has shown promising results, while providing a technology that targets the needs of developing countries in the areas of safe drinking water, basic sanitation, and solid waste recycling.
12

What is water? The history and crisis of a modern abstraction /

Linton, James (Jamie), January 1900 (has links)
Thesis (Ph.D.) - Carleton University, 2007. / Includes bibliographical references (p. 425-456). Also available in electronic format on the Internet.
13

Social transformations and knowledge in the context of a water crisis in the province of Córdoba, Argentina / Transformaciones sociales y conocimiento en un contexto de crisis hídrica en la provincia de Córdoba, Argentina

Koberwein, Adrián 25 September 2017 (has links)
En el presente artículo analizo el lugar que ocupa el conocimiento en la producción de nuevas relaciones sociales y configuraciones institucionales en el contexto de una crisis hídrica en las sierras chicas de Córdoba, Argentina. Basándome en un abordaje etnográfico, analizo la manera en que la información (tanto de origen científico como no científico) sobre ciertos hechos y fenómenos relativos al estado de situación de la crisis oficia como conocimiento en diferentes —pero complementarias— maneras, al ser, por un lado, apropiada y utilizada como base de las estrategias de visibilización de diferentes agrupaciones y organizaciones no gubernamentales, y por otro, fundamento de las intervenciones activas sobre la crisis por estas agrupaciones, creando así relaciones de cohesión, pero también de conflicto. Mostraré cómo estas relaciones se imbrican en un proceso de creación de nuevas configuraciones institucionales en el cual una campaña electoral, las preocupaciones y acciones concretas de los habitantes en torno al ambiente, y el conocimiento sobre los «procesos naturales», entre otras dinámicas, son considerados como parte constitutiva de un proceso más general de producción de la sociedad. / This article analyses the role of knowledge in the production of new social relations and institutional configurations in the context of a water crisis in Sierras Chicas, Córdoba, Argentina. Based on an ethnographic approach; it analyses the way in which factual information of scientific and non-scientific origin, operates as knowledge in two different but complementary ways: on the one hand, it is appropriated and used as the basis of visibility strategies by different groups and non-governmental organizations; on the other hand, it works as the ground for active interventions on the water crisis, generating both cohesive and conflictual relations. The article shows how these relations become embedded in the process of creation of knew institutional arrangements, in which an electoral campaign, the concerns and actions of the inhabitants regarding environmental problems, and the knowledge about «natural processes», among other dynamics, are considered part of a more general process of production of society.
14

Investigating Water Crisis in Iran

Jaberizadeh, Homa January 2020 (has links)
Though some have the opportunity to access water conveniently, getting a small amount of water may be tough and exhausting for others. In this paper, I will discuss on the right to water, which is explicitly expressed by a UN resolution as a human right. Sever water crisis, or drought, has been far beyond a lack of precipitation, but a phenomenon, occurring through a set of human activities, and interferences. My initial aim is to find out how and in what ways some human activities in Iran, interfered environment in a way that affected precipitation level and led to water crisis. And the second, is to show how unethical these activities may be, as they have been simply avoidable. Therefore, the Iranian governmental organizations (like municipalities) are ethically responsible to provide the required water, since the right to water is called a basic human right by UN. These facts obliges them to hinder these activities to secure this basic need. On this way, I make use of Nussbaum's capability approach to show, depriving the citizens from one of their basic rights (the right to water), through influencing climatic order (in a way that decreases precipitation level or depletes water resources), is considered a moral issue, therefore, it is binding for the state to take measures responsively to stop and control it in the future.
15

Urban Water Management in Dar es Salaam: A case for an Integrated Approach.

Mushi, Catherine January 2013 (has links)
The main objective of this study was to determine water access and use characteristics of household in Dar es Salaam in order to determine how the integrated urban water management (IUWM) approach can be applied in solving the water crisis in the city as well as other challenges of urban water supply and sanitation. A limited household water access and use survey was carried out in all three districts of Dar es Salaam. It was found that some of the principles of IUWM such “fit for purpose use” are already being practiced informally at household level, although this is not recognized in planning by Water Authorities. The study also shows that practices geared at saving and efficient use of water are well entrenched in households; with even those with access to sufficient amounts of water practicing it. At the user level, there do not appear to be any obstacles to adoption of IUWM. The potential for IUWM application is therefore shown to exist and recommendations are made for immediate measures such as incorporation of the various water sources in use in households into the formal system as well as improvements to methods of water saving, ground water extraction and rain water harvesting. Recommendations are also provided for wider adaptation of the entire city water management system to IUWM with emphasis on context driven solutions.
16

Impact of Premise Plumbing Conditions, Materials, Corrosion Control, Temperature, and Water Heater System Design on the Growth of Opportunistic Pathogens in Drinking Water

Martin, Rebekah Leighann 16 September 2020 (has links)
As waterborne disease originating in potable water plumbing systems (such as Legionnaires' Disease and Nontuberculous Mycobacterial (NTM) infections) continue to increase, it is important to better understand the cause(s), responsible parties and interventions to prevent disease. This dissertation begins with a literature review characterizing the propensity of building (premise) plumbing to enhance or diminish opportunistic pathogen growth, including Legionella. It then holistically examines the problem at the field, bench and pilot scale by first discovering problems with lead and Legionella in Flint, MI, during an event popularly referred to as the Flint Water Crisis in 2014-2016. Four years were then spent simulating critical factors hypothesized to have triggered the Legionella outbreak in residences and in a large hospital in Flint. In parallel with that work, pilot scale rigs were operated for several years, to examine the important role of water heater system design and operation on energy efficiency, hot water delivery, and Legionella. The first chapter literature review is entitled "Critical Review of the Propensity of Premise Plumbing Pipe Materials to Enhance or Diminish the Growth of Legionella and Other Opportunistic Pathogens." It examines the complex environments found in premise systems, focusing primarily on the role of pipe materials. The effects of metallic (copper, iron) and plastic pipe materials on opportunistic pathogens and Legionella include their effect on nutrient availability, disinfectant levels, and the composition of the broader microbiome. Design, configuration, and operation are also examined in terms of their potential for influencing opportunistic pathogens. This chapter demonstrates that pipe materials have the potential to stimulate or inhibit pathogen growth, dependent on circumstance and water chemistry. This chapter will be submitted to the journal Pathogens. The field study in this work first predicted, discovered and then exposed problems with lead and Legionella in Flint, Michigan. A citizen science project that sampled Flint water in August 2015, demonstrated a city-wide problem with water lead exceeding the EPA limit of 15 µg/L after corrosion control was interrupted. Follow-up sampling events between August 2015 and August 2017 demonstrated that the switch back to the original water source and addition of enhanced corrosion control in October 2015, dramatically reduced lead, copper and iron levels flowing into consumer homes. Entitled "Evaluating Water Lead Levels During the Flint Water Crisis," this work was published in Environmental Science and Technology in 2018. After our Virginia Tech team's work helped expose a Legionnaires' disease outbreak that killed twelve people and sickened nearly one hundred individuals, the started to explore possible links between corrosion control, plumbing materials and disinfection that could help explain the trajectory of disease in Flint and elsewhere. Three separate experiments were performed using bench-scale simulated glass water heaters. Two of the studies attempted to simulate what occurred in Flint homes before, during and after the water crisis in relation to factors that either encouraged or discouraged Legionella growth, while the third examined the more benign Blacksburg tap water and a broader range of influential plumbing conditions. The first study entitled "Copper Pipe, Lack of Corrosion Control, and Uncontrolled pH Influenced the Trajectory of the Flint Legionnaires' Disease Outbreak," determined that the very low pH levels in summer 2015 and interruption of phosphate corrosion control, could cause explosive growth of Legionella in PEX plumbing held at warm temperature, without disinfectant and with constant mixing. Under the same conditions copper pipe had antimicrobial properties that markedly reduced Legionella in our experiments. This work has been submitted for review to Environmental Science and Technology. The second companion study conducted at a higher pH, without mixing and with trace chlorine, found 2.5 log10 lower levels of Legionella compared to the worst-case conditions in the aforementioned study, demonstrating the importance of mixing and traces of chlorine. Higher levels of disinfectant and the presence of copper pipe also enhanced control of Legionella. This manuscript is titled "Interactive Effects of Copper Pipe, Stagnation, Corrosion Control, and Disinfectant Residual Influenced Reduction of Legionella pneumophila during Simulations of the Flint Water Crisis," and it has been published in Pathogens. The third simulated glass water heater study examined the disinfection of opportunistic pathogens in the presence of six different premise plumbing materials or conditions in Blacksburg tap water. Generally speaking, all of the premise plumbing materials reduced disinfection of opportunistic pathogens compared to a control condition with glass surfaces. Chlorine decay was catalyzed by iron pipe, warmer temperature and the presence of organic matter, increasing the persistence of Legionella. Magnesium anodes in particular, encouraged much higher Legionella growth compared to all other materials. This work titled "Chlorine and Chloramine Disinfection of Legionella spp., L. pneumophila, and Acanthamoeba Under Warm Water Premise Plumbing Conditions," has been submitted to Microorganisms. Results of a six-year pilot study titled "Elucidating the Role of Water Heater System Configuration in Energy Efficiency, Consumer Comfort and Legionella Proliferation," examined different types of residential-sized water heater systems with plastic pipes including: a standard tank system with water stagnant between uses, a recirculating tank system with flowing water between uses, and an on-demand system which only heated water and had flow during use. Considering the volume of water in each tank between 38 and 47 ° C as a measure of Legionella growth risk, with a heater setpoint at 48 °C (118 °F) the recirculating system had 90% of its volume at risk daily compared to only 24% of the standard system volume. The on-demand system used a minimum of 10% less energy than the standard tank, and 50% less energy than the recirculating tank, and had one tenth of the volume at risk of growing Legionella than either tank system. In fact, it was only by contriving a system to keep distal lines artificially warmed to above room temperature, that Legionella growth could occur in the on-demand system, whereas it rose to 107 L. pneumophila MPN per liter in a normally operating recirculating system. On the other hand, the on-demand heaters were repeatedly subject to mechanical malfunction during the study, and had difficulty delivering water at the desired temperature and flow rates versus traditional tank systems. This manuscript will be submitted to Water Research. / Doctor of Philosophy / Recent water crises in Flint, Michigan and Legionnaires' Disease outbreaks in Flint, New York City, and Quincy, Illinois have demonstrated the need to better understand the cause(s), responsible parties, and interventions required to prevent waterborne diseases. As waterborne disease originating in building plumbing systems (premise plumbing), such as Legionnaires' Disease and Nontuberculous Mycobacterial infections, continue to increase each year, the burden on healthcare systems and impact on public health also grows. In this dissertation, a literature review, a field study of water in Flint, small-scale laboratory studies, and residential-sized water heater systems were examined to study interactions between water chemistry, premise plumbing, and disease-causing opportunistic pathogens (OPs) with a focus on Legionella, the OP which causes Legionnaires' Disease. The first chapter literature review is entitled "Critical Review of the Propensity of Premise Plumbing Pipe Materials to Enhance or Diminish the Growth of Legionella and Other Opportunistic Pathogens." It examines the complex environments found in premise systems, and the important role of pipe material selection. The effects of metallic (copper, iron) and plastic pipe materials on opportunistic pathogens and Legionella include their impact on nutrient availability, disinfectant levels, and the composition of the broader microbiome. Design, configuration, and operation of plumbing systems are also examined in terms of their potential for influencing growth of opportunistic pathogens. This chapter demonstrates that pipe materials have the potential to stimulate or inhibit pathogen growth, dependent on circumstance and water chemistry. The field study in this work exposed problems with lead and Legionella in Flint, Michigan, during an event known in the popular press as the Flint Water Crisis 2014-2016. In August 2015, a citizen science sampling campaign demonstrated a citywide lead in water problem. After a federal emergency was declared, follow-up sampling events between August 2015 and August 2017 demonstrated that the switch back to the original water source, enhanced disinfection, and corrosion control under federal direction had reduced lead levels to half of the EPA limit. Additionally, the pipe material installed between each home and the water main (service lines) affected levels of lead and copper in water, with the lowest lead concentrations measured in homes with copper service lines. After our teams' work in Flint helped expose a Legionnaires' disease outbreak that killed twelve people and sickened nearly one hundred other individuals, we started to explore possible links between corrosion control, plumbing materials, and disinfection that could affect the trajectory of disease in Flint and elsewhere. Three follow-up studies, using small glass bottles to simulate water heaters, provided more specific comparisons between water conditions in premise plumbing and OP occurrence. Two studies expanded on phosphate corrosion control, chlorine (disinfectant) decay, and pH-related research questions, which arose during the Flint water crisis field study. The first determined that properly treated drinking water and some mixing could inhibit Legionella growth in copper pipes. The second study found that without mixing, copper could be antimicrobial and reduce Legionella growth even if the water chemistry was slightly altered with higher pH. The third simulated water heater study examined the reduction of OPs using a chlorine or chlorine plus ammonia disinfectant to reduce Legionella in the presence of six different plumbing conditions. The reduction of Legionella with chlorine was inhibited when carbon was increased and in the presence of a magnesium anode rod, a necessary water heater component. A six-year study using a residential-sized water heater system holistically examined three different types of water heater systems with plastic pipes: one using a standard water heater tank with water stagnant between uses, one using a water heater tank connected to a recirculating pump to provide constantly flowing water, and one tankless (on-demand) heater which only heated water and provided flow during use. Using temperature as an indicator of risk for Legionella growth, the recirculating system at a temperature setpoint of 48 °C (118 °F) would be at high risk for Legionella growth (water volume at 38-47 °C or 100-117 °F) in 90% of the tank volume each day, whereas the standard system would only be at high risk in 24% of the tank each day. The on-demand system provided the safest alternative for hot water distribution with virtually undetectable levels of Legionella risk when the pipes were kept at room temperature as per normal operation. The on-demand system also used at least 50% less energy than the recirculating system and 10% less energy than the standard system; however, we were not successful in finding a reliable on-demand system that could also provide hot water at the desired temperature and flow rate.
17

A crise hídrica da região metropolitana de São Paulo e o jornal Folha de S. Paulo / The metropolitan region of São Paulo water crisis and the newspaper Folha de S. Paulo

Camargo Neto, Lauro de 07 December 2018 (has links)
A análise das notícias publicadas pelo jornal Folha de S. Paulo sobre a crise hídrica que atingiu a região metropolitana de São Paulo nos anos de 2014 e 2015, se dá com o objetivo de identificar qual o discurso ambiental da Folha. Por meio de um levantamento das notícias publicadas entre 2013 e 2016, para observar também a cobertura da temática nos anós pré e pós crise, e utilizando como ferramentas metodológicas a Análise de Enquadramento e a Análise Crítica Do Discurso, coletando dados de quando, por quem e em qual caderno a notícia é classificada, foi possível identificar o viés trazido pelo discurso do jornal frente à temática. Observa-se que o jornal faz um discurso voltado ao utilitarismo dos recursos ambientais, colocando-o a disposição para ser utilizado pela sociedade humana, ao evidenciar como causas da crise hídrica a falta de chuvas e excessivo consumo humano domicilar, negligenciando outros aspectos como políticas públicas para ampliação da coleta de água e expansão dos reservatórios, conscientização da população, proteção das matas ciliares das bacias, entre outros fatores que contribuem para uma compreensão total da problemática ambiental. Essa abordagem culpabilizadora do consumo e dados pluviométricos, protege os gestores das bacias e agências de distribuição de água por não terem capacidade de prever o baixo índice de chuvas. Portanto, o jornal não faz uma cobertura que possibilite ao leitor compreender a complexidade do abastecimento de água da região metropolitana de São Paulo para além de um serviço prestado pelo ambiente para a sociedade. É necessário que os meios de comunicação superem essa visão utilitarista do ambiente natural, debatendo-o como parte integrante, e essencial, da sociedade humana, para que a população também tenha a compreensão que o ambiente natural é importante para sua sobrevivência. / The analysis of the Folha de S. Paulo newspaper on the water crisis that hit a metropolitan region of São Paulo in the years 2014 and 2015, was aimed at identifying the environmental discourse of the journal. Through a survey of the news, between 2013 and 2016, to see also coverage of the issue in the pre and post-crisis annals, and the use of the Critical Discourse Analysis and Framing Analysis, collecting data from when, by whom and in which category it is news, it was possible to identify the content brought by the discourse of the newspaper about the theme. The Folha de S. Paulo discourse is aimed at the utility of environmental resources, making itself available to be used by human society, by showing the causes of the water crisis are low rainfall values and excessive domiciliary use, neglecting others aspects such as public policies for the expansion of water collection and the expansion of reservoirs, awareness of the population, protection of watersheds of the basins, among other factors that contribute to a total understanding of the environmental problem. This guilty approach to consumption and pluviometric data protects managers on the ideia that they can\'t predict the low rainfall. Therefore, the newspaper does not make a coverage that allows the reader to understand the complexity of water supply in the metropolitan region of São Paulo as well as a service provided by the environment to society. It is necessary for the media to overcome this utilitarian view of the natural environment, debating it as an integral and essential part of human society, so that the population also has a correct understanding of the natural environment for its survival.
18

Coalizões e preferências políticas na crise hídrica da Região Metropolitana de São Paulo: o paradigma da gestão da oferta / Coalitions and political preferences in the water crisis of São Paulo Metropolitan Area: the hard path paradigm

Spinola, Ana Lúcia Gerardi 03 October 2018 (has links)
O aumento das regiões de escassez de água ao redor do mundo traz à tona questionamentos acerca de como a sociedade moderna utiliza a água e de que forma isso afetará a disponibilidade hídrica futura. Os resultados políticos, que têm influência significativa no agravamento destes eventos, são moldados por estratégias que refletem as preferências políticas dos atores envolvidos na gestão da água. Exemplos dessas estratégias são: a gestão da oferta, a gestão da demanda e o water soft path. A gestão da oferta é caracterizada pela dependência quase sistemática da busca por novas fontes de água. Enquanto a água estiver disponível para ser alocada, mesmo de locais distantes, há pouca discussão sobre medidas alternativas. A política de coalizão existe quando pessoas de dentro e fora do governo se mobilizam e interagem para traduzir suas crenças e ideias em ações concretas. Estas interações podem resultar em mudança ou na continuidade política. A pesquisa visou responder à questão de quais coalizões são identificadas no subsistema de gestão da água na crise hídrica da RMSP e quais abordagens de gestão essas utilizam. Para isso, valeu-se do Modelo de Coalizões de Defesa como ferramenta teórica, bem como de ferramentas computacionais de análise de redes sociais e de frequência de palavras como ferramentas metodológicas. Esse trabalho explorou a reafirmação da coalizão político-tecnocrática ao longo do período da crise hídrica. Essa coalizão foi articulada em torno do governo do Estado e de técnicos e gestores da Companhia Estadual de Saneamento; de forma que eles conseguiram centralizar as decisões em um grupo restrito de atores políticos e traduzir suas ideias em planos de obras emergenciais, guiados pelo paradigma da gestão da oferta. / The increase of water scarcity regions around the world raises questions about how modern society uses water and how this could affect future water availability. Political outcomes, which ones have a significant influence on the aggravation of these events, are shaped by strategies that reflect the political preferences of stakeholders involved in water management. Examples of these strategies are: supply management, demand management and water soft path. Supply- side management is characterized by the dependence from new water sources exploration. While water is available to be allocated, even from distant locations, there is few discussions about alternative measures. Coalition policy exists when people inside and outside the government mobilize and interact to translate their beliefs and ideas into concrete actions. These interactions can result in change or political continuity. The present research aims to answer the follow question: which policy coalitions could be identified into water policy subsystem during the water crisis in São Paulo Metropolitan Area? In order to achieve this goal, we applied The Advocacy Coalition Framework as theoretical tool and computational network analysis and word frequency as methodology. This work explores the politic-technocrat coalition continuity during water crisis. This coalition is articulated around State Government and State Sanitary Company, so they can translate their ideas in contingence plans underpinning by water supply paradigm.
19

Crise hídrica: um estudo sobre o desempenho econômico financeiro das empresas brasileiras de saneamento diante de escassez de água / Water crisis: a study on the financial performance of Brazilian sanitation companies during water scarcity

Almeida, Maria Donizeti Moraes 15 December 2016 (has links)
Submitted by Filipe dos Santos (fsantos@pucsp.br) on 2017-01-10T11:34:06Z No. of bitstreams: 1 Maria Donizeti Moraes Almeida.pdf: 1625133 bytes, checksum: b56b4087e7bd6d744927c26a6d4f45f2 (MD5) / Made available in DSpace on 2017-01-10T11:34:06Z (GMT). No. of bitstreams: 1 Maria Donizeti Moraes Almeida.pdf: 1625133 bytes, checksum: b56b4087e7bd6d744927c26a6d4f45f2 (MD5) Previous issue date: 2016-12-15 / The objective of this research was to identify the economic importance of the consequences of the water crisis in revenue and business costs Brazilian sanitation sector. The research was delimited in publicly traded water companies with active registration in the CVM - Brazilian Securities Commission and was developed by collecting data from balance sheets published in the CVM, analysis of assessment methodologies and financial economic management indicators for companies’ services to present a result of increased reliability; research of the tariff structure from the sanitation companies. This research based on the economic and financial data of the company, consisting of multiple case studies from the period of 2011 to 2015, determining the year 2011 as parameter for the period (2012-2015) in which the level of rainfall was below expectations. Financial statements and management reports were analyzed, which demonstrated operating performance in revenues generation and the change in costs arising from services of the companies surveyed. The research noticed that of the 10 investigated companies, only two had solid situation in 2015 balance sheet, even with reduction revenue in the period of water scarcity. Seven had the average tariff of water supply and sewage service increased above the IPCA (inflation index) variation. The sad conclusion is that the resources obtained by the collection of tariffs are insufficient to maintain and expand the operational structure necessary to provide a quality service to the population and still remunerate the shareholders. Most of brazilian basic sanitation company are economically vulnerable to water instability / O objetivo dessa pesquisa foi identificar a relevância econômica dos reflexos da crise hídrica na receita e nos custos de empresas brasileiras do setor. A investigação delimitou-se nas empresas de saneamento de capital aberto com inscrição ativa na CVM – Comissão de Valores Mobiliários e foi elaborada mediante coleta de dados dos balanços publicados na CVM e na SNIS, análise das metodologias de avaliação e de indicadores de gestão econômico financeira para empresas prestadora de serviços que apresentassem um resultado de maior confiabilidade e levantamento da estrutura tarifária das empresas de saneamento. Tomou-se por base o histórico econômico-financeiro das empresas, composto de estudo de caso múltiplo do período de 2011 a 2015, considerando o ano 2011 como parâmetro para o período em que o nível de chuva foi abaixo do esperado, 2012 a 2015. Foram analisadas demonstrações contábeis e relatórios gerenciais que evidenciaram o desempenho operacional na geração de receitas e a variação dos custos oriundos dos serviços das empresas pesquisadas e o estudo apontou que das 10 empresas averiguadas, somente duas apresentaram situação sólida no balanço de 2015, mesmo com redução da receita no período da escassez hídrica. Sete empresas tiveram a tarifa média praticada do serviço de fornecimento de água e esgoto, majorada acima da variação do IPCA do período. A triste conclusão é que os recursos obtidos pela cobrança das tarifas são insuficientes para manter e ampliar a estrutura operacional necessária para prestar um serviço de qualidade à população e ainda remunerar os acionistas. A maioria das empresas brasileiras do setor está economicamente vulnerável à instabilidade hídrica
20

Day Zero: the role of social movements inthe face of Cape Town’s water crisis

Peñaloza Lanza, Roberto Andrés, Alzaté González, Laura Daniela January 2019 (has links)
In 2017 and 2018, the city of Cape Town, in South Africa, suffered one of the most severewater crises ever seen, becoming the first big city to face a realistic scenario of a "DayZero", the day in which the dams reach a water storage level unable to provide waterservices to other than critical services. In the wake of this emergency, severalorganisations and movements started to organise themselves to mitigate the effects ofthe drought and find a solution. The measures undertaken by the local government, whichincluded punitive tariffs for the citizens, caused a big discontent among the population,who protested in the streets to demand a proper solution. Amid the protesters, the socialmovements rose to demand from the authorities democratic and reasonablemanagement of the water in the city, putting pressure by protesting, creating petitions,mobilising people and spreading facts about the crisis and what they believed were thetrue problems behind it.This qualitative research included a field study in the city of Cape Town and usesabductive research for the analysis of data. The study is exploratory, as it intends tounderstand and explore what happened during the crisis and the role of socialmovements to create a narrative. Five interviews were conducted between two differenttarget groups: social movement actors and authorities.This thesis focuses on the role that social movements played and their dynamics in theoutcome of the actions taken by the authorities to address the water crisis in Cape Town.Using social movement theory and alliances theory, this explores what actors wereinvolved, what actions and activities the social movements conducted, and what was theoutcome of the role they played. This is done in order to create a narrative of the factsthat occurred during the crisis until the Day Zero was officially called off by the localauthorities, the moment in which the organisations stopped their engagement due towhether the loss of the momentum, the collapse of the alliances or the accomplishmentof their minimum demands.The study concludes that there were two moments that determined the role of socialmovements during the water crisis: first, with the emergence of the crisis, the movementsgathered and played a communicator role, delivering information and sharing facts;secondly, after the measures taken by the authorities were announced, the movementsplayed an instigator role as an opposition to the local government, putting pressure mainly in the streets. We conclude that the outcome delivered by the authorities, the so-called Water Strategy, was an important step but did not respond to the demands of the movement sufficiently, as it was not conducted in a participatory way, although itincluded some of the demands of the movement. It is not possible to conclude that therole played by the social movements was key to determine the outcome of the crisis, butthey contributed to put pressure and make visible the demands for a more democraticwater management.

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