http://repositorio.ufrr.br:8080/jspui/handle/prefix/675 Mon, 23 Mar 2026 14:44:41 GMT 2026-03-23T14:44:41Z http://repositorio.ufrr.br:8080/jspui/handle/prefix/950 Título: Análise das perdas nos sistemas de distribuição de água da CAER em Boa Vista/RR Autor(es): Galán, Iara Alexandra Wiswell Primeiro Orientador: Matos, Alex Bortolon de Abstract: The growing demand for efficiency in water resource management and the need to reduce losses in supply systems have highlighted the importance of individualized consumption metering. In Boa Vista, state of Roraima, approximately 30% of households served by the Companhia de Águas e Esgotos de Roraima – CAER do not have water meters, which compromises both billing accuracy and the company’s operational indicators. This study aims to analyze the impacts of the absence of micro metering on water loss indices and to propose strategies to improve CAER's tariff policy. A quantitative and empirical approach was adopted, based on data from 98 households that received water meters, allowing a comparison between real consumption and the fixed value of 10 m³ per month used as the minimum billing reference for unmetered households. Two timeframes were analyzed: three months and twelve months after meter installation. The results showed that the average actual consumption per household remained stable and consistently above the volume considered by the company. Underestimation of consumption generated an average annual surplus of over 90 m³ per household, resulting in significant apparent losses. When multiplicated to the 25,000 households without individualized metering in Boa Vista, it is estimated that more than two million m³ of water are consumed and not billed annually, representing a potential financial loss of over BRL 14 million per year from water alone, which could exceed BRL 25 million when including sewerage fees. The analysis of consumption behavior revealed variations among reduction, increase, and stability, indicating that installing meters alone does not guarantee lower consumption, although it is essential for fair billing and loss control. As a result of this research, a technical note was prepared recommending the revision of the minimum consumption value considered by CAER, aiming to align the tariff structure with actual consumption patterns, reduce operational losses, and promote greater financial balance and fairness in the billing system. Editor: Universidade Federal de Roraima Tipo: Dissertação Wed, 01 Jan 2025 00:00:00 GMT http://repositorio.ufrr.br:8080/jspui/handle/prefix/950 2025-01-01T00:00:00Z http://repositorio.ufrr.br:8080/jspui/handle/prefix/949 Título: Simulação de inundação em Boa Vista - RR, uso dos modelos de elevação Alos Palsar, MERIT e software HEC-RAS Autor(es): Engelhardt, Rafael Castelo Branco Primeiro Orientador: Silva, Adriano Frutuoso da Abstract: The Boa Vista, Roraima Urban zone are located at the area of flat terrain with natural lagoon formation, that condition contribute for the flood occurrence in the raining season. These floods cause numerous incidents and losses to the population that occupies these areas, making it very important to carry out flood simulations that can inform people of the risks and assist in prevention and planning. To carry out simulations of flood in stream with the HEC-RAS Software, the relief condition with little altimetric variation in addition to the presence of forest islands on the banks of the main streams, result in models with a high presence of errors, making it difficult to apply a methodology that includes these elevation models. This was observed when comparing the simulations with the visual observation of the events and the research. With means to resolve this problem, was verified the methodology toward the simulation in HEC-RAS and MERIT Digital Elevation Model of the flood in a stream of the Olimpico district, west zone of the city. Then was possible to verify with the mentioned methodology the resulting flood coverage for the return period of 5, 10 e 20 years. Editor: Universidade Federal de Roraima Tipo: Dissertação Mon, 01 Jan 2024 00:00:00 GMT http://repositorio.ufrr.br:8080/jspui/handle/prefix/949 2024-01-01T00:00:00Z http://repositorio.ufrr.br:8080/jspui/handle/prefix/937 Título: Análise da perspectiva de alunos e professores sobre educação ambiental aplicada aos recursos hídricos em escolas estaduais da cidade de Boa Vista-RR Autor(es): Duarte, Francinéia de Araújo Primeiro Orientador: Vieira, Carlos Eduardo Lucas Abstract: This research analyzes the perspectives of students and teachers on basic issues of water resources and related environmental education in state schools in Boa Vista - RR. Due to its dependence on water, Boa Vista is strategically located in a region with considerable water supply, which intensifies the relevance of these issues for the local community. Using a qualitative and quantitative approach, the study analyzes the perceptions of students and teachers on environmental issues, teaching methods and the challenges faced in implementing educational practices related to the preservation and sustainable use of these resources. The results reveal students' awareness of the importance of environmental preservation, contrasting, however, with disparities in the effectiveness of the educational approaches adopted. The crucial role of teachers in promoting environmental education emerges, although they face obstacles such as the need for continuous professional development and the scarcity of appropriate educational resources. It is recommended that local educational policies be revised to more broadly integrate sustainability principles into school curricula, in addition to providing adequate support to teachers. As a result of this research, an educational booklet was developed for students, teachers and the community in general, focusing on sustainable practices and raising awareness about the responsible use of water resources. This study is not limited to offering a detailed analysis of environmental educational practices, but also proposes improvements in educational strategies, aiming to foster broader and more effective environmental awareness in the school community of Boa Vista - RR. These initiatives aim not only to strengthen students' theoretical understanding of environmental issues, but also to promote the adoption of sustainable behaviors that contribute to the preservation of local natural resources. It is also suggested that future research investigate the impact of specific educational interventions on modifying students' environmental behaviors in the long term. Editor: Universidade Federal de Roraima Tipo: Dissertação Mon, 01 Jan 2024 00:00:00 GMT http://repositorio.ufrr.br:8080/jspui/handle/prefix/937 2024-01-01T00:00:00Z http://repositorio.ufrr.br:8080/jspui/handle/prefix/936 Título: Análise do rompimento hipotético da barragem da CAER no Município de Alto Alegre/RR Autor(es): Lédo, Byatriz Cordeiro Primeiro Orientador: Silva, Adriano Frutuoso da Abstract: This study aims to simulate the hypothetical rupture of the dam of a water reservoir located in the municipality of Alto Alegre-RR, through 'piping,' and evaluate, using an inundation map, the impacts on areas near the downstream channel of the dam. The specific objectives are to inspect the dam structure, analyze the dissipation of the flood wave generated by the rupture using a hydrological model, and provide support for the management and regulation of water resources through the generated maps. The dam is registered in the National System of Information on Dam Safety (SNISB) under code 5291, with the Companhia de Águas e Esgoto de Roraima (CAER) as its owner. The selection of the SNISB 5291 dam for the study is due to the lack of periodic analyses by both the operator and the state regulatory agency, its proximity to the urban area, and the presence of road infrastructure on its crest, which represents a significant risk to human life and to the social and economic activities of the municipality. The study of the watershed upstream of the dam allowed for the determination of the inflow hydrograph and the calculation of the region's average annual precipitation. Using RAS Mapper, a tool from the HEC-RAS software, the main channel and the dam structure were defined to simulate the rupture in a non-permanent regime. 132 cross-sections were created along the main channel, spaced 30 meters apart. The methodology of MacDonald & Langridge-Monopolis (1984) was applied to determine the breach failure parameters, resulting in a formation time of 0.21 hours. The simulation in HEC-RAS revealed that the inundation area downstream extends into agricultural areas and that a significant portion of the water does not flow superficially, showing uniformity in the average velocity along the channel. The resulting inundation map showed that the dam rupture would have substantial impacts on the socio economic activities of the population living in Alto Alegre-RR. Editor: Universidade Federal de Roraima Tipo: Dissertação Mon, 01 Jan 2024 00:00:00 GMT http://repositorio.ufrr.br:8080/jspui/handle/prefix/936 2024-01-01T00:00:00Z