https://repositorio.ufu.br/handle/123456789/18944 2026-08-28T15:25:08Z https://repositorio.ufu.br/handle/123456789/49548 Title: Análise das apreensões de madeiras nativas em Minas Gerais Abstract: The illegal exploitation of native woods represents one of the main pressures on Brazilian forest ecosystems, contributing to environmental degradation, biodiversity loss, and the impairment of ecosystem services. In Minas Gerais, a state that contains important remnants of native vegetation, the monitoring of forest product seizures constitutes a strategic tool to support environmental inspection actions and strengthen natural resource management. In this context, Chapter 1 of this dissertation presents the theoretical framework, justification, research objectives, and methodology for data collection and analysis, aimed at interpreting the spatio-temporal dynamics of native woods seizures in the state between 2019 and 2024, seeking to identify seasonal patterns, temporal trends, and priority areas of occurrence. Chapter 2 addresses the statistical analysis of seizures using 26,248 records provided by the State Secretariat for Environment and Sustainable Development (SEMAD). To this end, time series were developed to evaluate the behavior of seizures throughout the studied period, applying the Friedman and Scott-Knott tests to verify significant differences among groups and cluster similar ones, thereby enabling the identification of the influence of seasonality on the Seasonal Autoregressive Integrated Moving Average (SARIMA) model, in addition to modeling and future projections. Subsequently, Chapter 3 presents the spatial analysis of occurrences through Kernel Density Estimation (KDE), using georeferenced data processed in the QGIS software to identify hotspots and spatial concentration patterns of seizures. The results revealed well-defined spatio-temporal patterns in native woods seizures in Minas Gerais, with a higher incidence of violations during the dry season, especially between July and September. The SARIMA modeling proved to be suitable for representing the historical behavior of seizures and assisting in the projection of future trends. The spatial analysis using KDE revealed a persistent concentration of occurrences in the Jequitinhonha and Rio Doce Valley regions, associated with the availability of forest resources, logistical accessibility, and proximity to urban centers. It is concluded that the integration of time series and spatial analysis techniques constitutes an efficient approach to understanding the dynamics of illegal native woods exploitation, contributing to the strategic planning of environmental enforcement, optimization of resource allocation, and strengthening of evidence-based public policies. 2026-02-25T00:00:00Z https://repositorio.ufu.br/handle/123456789/49007 Title: Encerramento de locais de disposição inadequada de resíduos sólidos urbanos: o contexto brasileiro frente à países desenvolvidos Abstract: It is known that final disposal of MSW carried out improperly (in Dumps or Controlled Landfills) has a high potential to cause a range of problems ranging from soil, water and air pollution to social and health problems such as contamination with potentially toxic, carcinogenic, or mutagenic chemical substances. The present work aimed to evaluate and establish an overview of the current situation in Brazil regarding the decision on the need to close inappropriate MSW disposal sites with the existence or not of guidelines for action. Information was sought on the subject in selected developed worldwide countries and at the national level, to analyze existing scenarios and propose possible strategies on the matter. During the study the three stages were covered, the first by the search for information in the international context through legislation, and the second and third the search in the national context, respectively in the federal and state context, through searches in legislation and entities. All searches for documents with information regarding the closure or monitoring of areas with irregular disposal of MSW were carried out at official sites such as official government websites, technical standards and public agencies, and the searches were carried out between June and November 2023. Results of the work show that there is a huge deficiency in Brazil in the mapping of contaminated areas and even more in areas contaminated by inadequate disposal of MSW. Based on the lack of knowledge and statistics on the quantity of contaminated areas, it is a fact and expected that the problem will be aggravated and there will be no solution with pre- established guidelines that would enable effective actions to be taken. As for the states, only 5 of them have some content about guidelines for closing sites with inadequate MSW disposal, such as Maranhão, Mato Grosso do Sul, Rio Grande do Sul, Rondônia e São Paulo. In the international context, although the use of landfills as final disposal is passed over, it is still a used solution mainly in the USA and Eastern European countries, however, in these countries there are guidelines and closure targets that are encouraged due to the high adherence of other solutions such as recycling and composting. 2024-01-22T00:00:00Z https://repositorio.ufu.br/handle/123456789/48954 Title: Sustentabilidade econômica da neutralização da pegada de carbono de sistemas fotovoltáicos: análise de caso da usina fotovoltaica da Universidade Federal de Uberlândia (UFU. Abstract: This study analyzes the economic sustainability of the photovoltaic plant at the Federal University of Uberlândia (UFU), aiming to quantify its carbon footprint through Life Cycle Assessment (LCA) and to evaluate the financial feasibility of its full neutralization. The research examines the "Geographical Paradox" of the energy transition, showing that embodied carbon from the manufacturing phase can offset the environmental benefits achieved during operation. The methodology comprised quantification of total emissions, estimation of the reforestation area required in the Cerrado biome for carbon compensation, and an economic analysis of costs integrated into the project’s cash flow. The results indicate that the plant’s carbon footprint, ranging from 696.47 to 1,511.34 t CO₂eq, requires a restoration area between 1.97 and 10.99 hectares. Monetization of this environmental liability reveals a substantial financial impact, representing 30.97% to 36.46% of total operational expenditure (OpEx). Grounded in Ecological Economics principles, the study concludes that clean energy project management must internalize supply chain costs to ensure full sustainability and alignment with Sustainable Development Goal (SDG) 12. 2025-11-28T00:00:00Z https://repositorio.ufu.br/handle/123456789/48663 Title: Uso, ocupação do solo e mudanças ambientais ocorridas entre 2013 e 2023 na represa de Miranda, Uberlândia, Minas Gerais Abstract: The main goal on this dissertation is to analyze the changes on the environmental dynamic and in the land use around the Miranda Dam, located in Uberlandia, Minas Gerais, from 2013 to 2023. This research seeks to comprehend the ecological degradation process from the expansion of human activities, like urbanization, agriculture and grazing, that have been contributing to reduce the forest coverage and increasing the fragmentation of natural habitats. Therefore, was used an integrated methodology, combining techniques of geoprocessing, temporal analysis of satellite images and field survey, with the aim of mapping urban sprawl, vegetation loss, erosion processes, siltation and the removal of permanent preservation areas, the rising disordered occupation have been aggravating the environmental impacts, increasing the ecosystem vulnerability. Also noteworthy, that the decrease in vegetation cover on the east and northeast areas around the dam have been strongly associated with the expansion of agricultural activities and grazing. Furthermore, the impermeabilization of the soil and new infrastructure buildings hinder water infiltration, favoring erosion processes. This research also strengthens the importance of implementing sustainable environmental management measures, promoting the recovery of degraded areas and ensuring compliance with current legislation. Adopting effective public policies, integrated with territorial management, is essential to preserve the water resources, the biodiversity and the resilience of the local ecosystems, ensuring the sustainable development of the region in the long term. 2026-02-26T00:00:00Z