https://tede.unioeste.br/handle/tede/512 Fri, 02 Oct 2026 00:49:59 GMT 2026-10-02T00:49:59Z 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 Tue, 18 Aug 2026 00:00:00 GMT https://tede.unioeste.br/handle/tede/8673 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 Mon, 24 Aug 2026 00:00:00 GMT https://tede.unioeste.br/handle/tede/8665 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 Fri, 17 Jul 2026 00:00:00 GMT https://tede.unioeste.br/handle/tede/8661 2026-07-17T00:00:00Z https://tede.unioeste.br/handle/tede/8571 Title: Sustem Hidropônico em Desenvolvimento de Alface com Suplementação de LED Vermelho e Azul. Autor: Santos, Raynne Raphaela Rodrigues Primeiro orientador: Siqueira, Jair Antonio Cruz Abstract: The objective of the study was to analyze the growth of lettuce in a hydroponic system, supplemented with red and blue LEDs, under partially controlled climatic conditions. The goal is to obtain results indicating that the use of red and blue light leads to greater efficiency in production, surpassing the growth of lettuce without supplemental lighting. Seedlings were first grown in a nursery for a few days and then transferred to an NFT (Nutrient Film Technique) hydroponic system. The plnts were exposed to natural light, with and without supplemental LED Grow lighting, for 32 days. At the end of this period, several parameters were evaluated: number of leaves (NF), root length (CR), STEM LENGTH (CC), stem diameter (DCA), fresh root mass (MVP), fresh root mass (MVR), fresh stem mass (MVC), dry shoot mass (MSP), dry root mass (MSR), and dry stem mass (MSC). The experiment considered climatic variations into account. Smooth-lettuce stood out for having a higher number of leaves and fresh mass, regardless of the lighting source. Curly lettuce showed better root development under natural light. It is concluded that artificial light is a viable alternative; however, natural light may be more efficient for sensitive cultivars. Publisher: Universidade Estadual do Oeste do Paraná Tipo do documento: Dissertação Mon, 23 Feb 2026 00:00:00 GMT https://tede.unioeste.br/handle/tede/8571 2026-02-23T00:00:00Z