http://repositorio.ufrr.br:8080/jspui/handle/prefix/49 2026-03-30T19:13:49Z 2026-03-30T19:13:49Z Sales, Paula Jordana Sampaio de http://repositorio.ufrr.br:8080/jspui/handle/prefix/952 2026-03-23T05:00:28Z 2026-01-01T00:00:00Z

Título: Incentivo fiscal como fomento ao uso de medidas mitigadoras para controle de alagamentos em Boa Vista (RR) Autor(es): Sales, Paula Jordana Sampaio de Primeiro Orientador: Matos, Alex Bortolon de Abstract: The advance of urbanization and land use and occupation practices cause a series of adverse impacts, among which flooding stands out, causing damage and inconvenience to the population. In this context, the adoption of source control measures (SCM) is an effective strategy for mitigating the overload on conventional urban drainage systems. This study analyzes the economic feasibility and potential for adopting tax incentives as a tool to encourage the voluntary implementation of SCM by companies located in the urban area of Boa Vista, Roraima. The research, which addresses Sustainable Development Goals (SDGs) 6, 11, and 13, adopted a qualitative-quantitative approach. The methodology comprised: (i) selection of source control measures applicable to the urban context of Boa Vista; (ii) estimation of the implementation costs of the selected measures, based on data from the National Civil Construction Cost and Index Research System (SINAPI); (iii) selection of the tax incentive instrument – Urban Property Tax (IPTU); (iv) simulation of scenarios comparing implementation costs spread over ten years (C10) with potential tax discount percentages (D); and (v) development of guidelines for the implementation of a municipal tax incentive aimed at the voluntary adoption of MCF. The results indicate that tax incentives based on property tax discounts have limited and heterogeneous compensatory effectiveness among different types of source control measures, showing greater direct economic viability in low-complexity, low-cost solutions, as well as in projects subject to higher property tax values. However, although the adoption of these measures proves to be financially advantageous only in specific scenarios, the literature points out that, as components of sustainable drainage systems, they generate relevant indirect benefits associated with the quantitative and qualitative control of stormwater, environmental and urban enhancement, and increased resilience to climate change. It is concluded that the policy analyzed has limited applicability when evaluated from a strictly financial perspective, requiring coordination with other management instruments. Editor: Universidade Federal de Roraima Tipo: Dissertação

2026-01-01T00:00:00Z Viana, Sarah Wysllana Souza http://repositorio.ufrr.br:8080/jspui/handle/prefix/951 2026-03-17T05:01:16Z 2026-01-01T00:00:00Z

Título: Proposta de delimitação da bacia hidrográfica do igarapé Carrapato e seu significado para a gestão hídrica Autor(es): Viana, Sarah Wysllana Souza Primeiro Orientador: Vieira, Carlos Eduardo Lucas Abstract: Accurate watershed delineation is fundamental for effective water resources management, as it enables a comprehensive understanding of fluvial dynamics, water availability, and the interactions between surface and groundwater systems. In this context, this study focuses on improving the delineation of the Carrapato Stream Watershed (BHIC), located in the municipality of Boa Vista, Roraima State, Brazil, in response to increasing anthropogenic pressure associated with urban expansion and agro-pastoral activities, aligning with the Sustainable Development Goals (SDGs) 3, 6, and 11. The main objective was to delineate the BHIC through the integration of satellite- and drone-based remote sensing techniques, Digital Elevation Models (DEMs), and geospatial data, with emphasis on analyzing surface and groundwater dynamics and evaluating their applicability to water resources management. The methodologywasbasedonastepwiseapproachintegratingmultipleDEMs(FABDEM, COP 30, SRTM, ALOS PALSAR, NASADEM, and ANADEM), drone-derived orthomosaics, field-based altimetric validation, multitemporal optical image analysis, geoprocessing techniques, hydrogeological interpolation, application of spectral indices (NDVI, SAVI, NDWI, and MNDWI), and analysis of data from the SIGGAR and SIAGAS databases. The results demonstrated that DEM selection has a decisive influence on the accuracy of watershed delineation, with higher-resolution and hydrologically corrected models providing representations more consistent with actual topographic features, whereas more generalized models led to the inclusion of areas without effective drainage contribution. The final watershed area was estimated at 109.372 km², with elevations ranging from 54 to 120 m. Environmental analysis revealed the occurrence of 12 fire hotspots between 2016 and 2024, including five in 2016, one in 2022, and six in 2024, with no direct occurrences within the watershed in 2018 and 2020, indicating improvements in fire control. Burned area scars mapped between 2016 and 2023 totaled 32.333 km² according to DETER and 20.602 km² according to SIGGAR, corresponding to 29.56% and 18.84% of the watershed area, respectively, without evidence of significant impacts on hydrological balance. From a hydrogeological perspective, the groundwater depth map indicated variations between 0 m and +2.10 m, evidencing high aquifer vulnerability. Potentiometric levels ranged from 63.66 to 87.83 m during the dry season and from 62.00 to 90.50 m during the rainy season, with predominant groundwater flow from north to south, delineating recharge zones in the northern sector and discharge zones in the southern sector. Regarding water use, SIGGARidentified 249 groundwater abstractions and 39 surface water withdrawals, while SIAGAS registered 64 wells associated with multiple uses, highlighting limitations in monitoring and data integration. The integration of surface, subsurface, and environmental data resulted in a robust and replicable technical framework capable of supporting territorial planning and strengthening integrated water resources management in the BHIC. Editor: Universidade Federal de Roraima Tipo: Dissertação

2026-01-01T00:00:00Z Galán, Iara Alexandra Wiswell http://repositorio.ufrr.br:8080/jspui/handle/prefix/950 2025-10-14T05:01:38Z 2025-01-01T00:00:00Z

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

2025-01-01T00:00:00Z Engelhardt, Rafael Castelo Branco http://repositorio.ufrr.br:8080/jspui/handle/prefix/949 2025-10-08T05:01:21Z 2024-01-01T00:00:00Z

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

2024-01-01T00:00:00Z