https://tede.unioeste.br/handle/tede/6298 2026-10-11T21:19:45Z https://tede.unioeste.br/handle/tede/8673 Title: Impacto da urbanização na microbacia do rio Cascavel – município de Cascavel – Paraná – Período 2015 a 2020 Autor: Santos, Cristiano de Assumpção Primeiro orientador: Feiden, Armin Abstract: Rapid and unplanned urban growth has caused significant changes in watershed dynamics, compromising their capacity for hydrological regulation and their environmental sustainability. The Cascavel River micro-watershed, located in the municipality of Cascavel, Paraná, Brazil, with a catchment area of 50.51 km², is a representative example of this process, as its headwaters lie within the urban perimeter and are directly affected by urban and agricultural expansion in the region. This study analyzed the impacts of urbanization on the streamflow of the Cascavel River micro watershed, investigating the relationship between increasing soil sealing, land use and occupation, and the watershed's hydrological response over time. The methodology combines analysis of historical streamflow and precipitation records from 2002 to 2020, supervised classification of Sentinel-2 satellite imagery (2015-2020) processed in QGIS using the Maximum Likelihood algorithm (MAXVER), with an Overall Accuracy of 86.57% and a Kappa coefficient of 0.8159, and multivariate statistical analysis through Principal Component Analysis (PCA) and Hierarchical Cluster Analysis. A continuous expansion of the urbanized area was identified, from 28.41% to 31.28% of the micro-watershed (+1.45 km² over six years), at the expense of temporary cropland and remaining forest cover. Mean daily streamflow dropped from 1.53 m³/s in 2018 to 0.33 m³/s in 2020 — a decrease of approximately 78% — including an interval between 2018 and 2019 in which precipitation varied by only 3.4% while streamflow fell by 66%. The multivariate analysis organized the data into two orthogonal factors — a rainfall factor and a hydrological response factor — accounting for 79.70% of the total variance, evidencing a partial decoupling between precipitation and streamflow. The results indicate a contribution of urbanization and soil sealing to the variations in the Cascavel River's streamflow, with effects on surface runoff, infiltration, and basin recharge, and risks associated with a higher frequency of extreme events, such as floods and severe droughts. The findings provide technical support for public policies and for environmental recovery and urban planning strategies, with a focus on water resources conservation and the mitigation of the effects of urban densification. Publisher: Universidade Estadual do Oeste do Paraná Tipo do documento: Tese 2026-08-18T00:00:00Z https://tede.unioeste.br/handle/tede/8665 Title: Viabilidade técnico-econômica de sistemas fotovoltaicos na indústria leiteira: uma análise comparativa de topologias on-grid, off-grid, híbrido com bateria e zero grid Autor: Silva, Eric Valero Carvalho da Primeiro orientador: Santos, Reginaldo Ferreira Abstract: The growing need for sustainable technologies and the rise in energy costs impose significant challenges on agribusiness, especially on the dairy industry, an intensive consumer of electricity. In this context, distributed photovoltaic generation emerges as a strategic solution to increase the resilience and economic competitiveness of these properties. This dissertation aims to perform a technical and economic feasibility analysis of the implementation of four distinct photovoltaic system topologies—on-grid, off-grid, hybrid with battery storage, and zero-grid—in two dairy industries with different consumption and grid connection profiles.The analyses in this study comprise a Group A consumer unit (high voltage), located in Céu Azul, PR, and a Group B consumer unit (low voltage), in Engenheiro Coelho, SP. The sizing of the systems was based on the historical electricity consumption of the last 12 months for each unit, as well as on the average and minimum solar irradiation data for each location, ensuring an analysis appropriate to the operational reality and generation potential of each plant. From the results obtained, it was found that the on grid and zero grid systems are viable in both consumer units (UC-A and UC-B). On the other hand, the off grid and hybrid configurations showed to be financially unviable for the same scenarios. Publisher: Universidade Estadual do Oeste do Paraná Tipo do documento: Tese 2026-08-24T00:00:00Z https://tede.unioeste.br/handle/tede/8661 Title: Automação Para Uma Usina Solar Tipo Tracker de Um Eixo Autor: Ponte, Enerdan Fernando Dal Primeiro orientador: Santos, Reginaldo Ferreira Abstract: Electricity generation via photovoltaic systems which harness incident solar radiation on solar cells to produce electricity is expanding in Brazil. This growth is largely due to the country's location in the intertropical zone, where solar irradiation levels exceed those of European nations such as Spain, Germany, and France. The use of photovoltaic generation systems is also increasing in agricultural areas; many producers are shifting toward net metering or selling electricity to utility companies by installing solar power plants on their properties. However, electricity generation efficiency is limited by the capacity of individual photovoltaic modules, as the installations are fixed while the sun’s position shifts throughout the day. This study developed an automated tracking system specifically a single-axis Tracker to follow the sun's position. A comparison was conducted between the fixed system and the operating Tracker system; the results showed a cumulative generation advantage of R$ 296,091.43 over a 25-year period in favor of the Tracker-based plant. Based on these findings, the Levelized Cost of Energy (LCOE) was determined to be R$ 361.07, and the discounted payback period for the investment was calculated at six years. Publisher: Universidade Estadual do Oeste do Paraná Tipo do documento: Tese 2026-07-17T00:00:00Z https://tede.unioeste.br/handle/tede/8492 Title: Fragilidade ambiental e potencial energético em propriedades de agricultura familiar no Município de Cascavel- PR Autor: Bandeira, Gabriela Primeiro orientador: Prior, Maritane Abstract: Family farming plays a strategic role in food security, environmental sustainability, and socioeconomic development, especially in agro-productive regions such as Cascavel. However, this sector faces significant challenges related to land-use intensification, reduction of vegetation cover, and the need to incorporate sustainable technologies that ensure the productive viability of rural properties. In this context, this study aimed to identify and classify environmental fragility levels and to assess the potential for renewable energy implementation in family farming properties in Cascavel–PR, Brazil, through an integrated geospatial approach. The methodology was based on the environmental fragility framework proposed by Ross (1994), distinguishing potential fragility, associated with natural terrain conditions, and emergent fragility, resulting from the interaction between physical factors and anthropogenic land use. Slope was classified according to technical parameters from EMBRAPA and IBGE; land use and land cover were analyzed using MapBiomas Collection 10; and Permanent Preservation Areas (APPs) were evaluated in accordance with Brazilian Forest Code (Law No. 12,651/2012). A total of 67 rural properties distributed across eight districts of the municipality were analyzed, with six selected for multitemporal analysis of land use and land cover between 2015 and 2023. The results revealed a predominance of moderate (50.7%) and high (40.3%) environmental fragility levels, mainly associated with undulating terrain and intensified agricultural use. The estimated energy potential indicated an average productivity of 1,515 kWh/kWp·year for photovoltaic generation, demonstrating not only the technical feasibility of solar energy in rural contexts, but also its potential as a complementary strategy for income generation and strengthening family farming systems. Unlike conventional approaches that assess energy potential in isolation, the results show that its feasibility is directly related to local environmental conditions, such as slope, vegetation cover, and the presence of protected areas. It is concluded that the integration of environmental planning and energy use allows not only the mitigation of impacts in more sensitive areas, but also the optimization of land use. Furthermore, this integration may contribute to the reorientation of territorial planning in family farming and to the development of public policies aimed at sustainable land use, productive diversification, and the promotion of environmentally suitable energy systems, in alignment with the Sustainable Development Goals. Publisher: Universidade Estadual do Oeste do Paraná Tipo do documento: Tese 2026-04-07T00:00:00Z