https://ri.ufs.br/jspui/handle/riufs/2547 2026-09-04T15:24:14Z https://ri.ufs.br/jspui/handle/riufs/25858 Título: Caracterização do índice de anomalia de chuva (IAC) da Bacia Hidrográfica do Rio Itapicuru, estado da Bahia, a partir da base de dados Brazilian Daily Weather Gridded Data (BR-DWGD) Autor(es): Borges, Adonai Bastos Abstract: Extreme rainfall events are episodic climatic fluctuations in precipitation patterns that are associated with the occurrence of natural disasters worldwide and have significant impacts on various sectors of society. Forecasting these events based on the monitoring of climate variables is essential for the development of decision-making systems and public policies to mitigate environmental impacts by government agencies, especially in regions susceptible to periods of drought and consequent water shortages, such as the northeastern semi-arid region. The watersheds in this region of the country—which serve as key territorial units for water resource management—are particularly vulnerable to disruptions in their biological processes, exacerbated by the current climate change scenario. A prime example is the Itapicuru River basin, one of the most important water reservoirs in the state of Bahia, which encompasses the Central Tucano sub-basin. In this context, drought monitoring indices are used by researchers to provide a spatiotemporal overview of the frequency of rainfall anomalies based on a historical series of precipitation data provided by the Brazilian climate monitoring network, such as the Rainfall Anomaly Index (IAC), which is categorized using annual rainfall totals and is easy to manipulate mathematically. Due to limitations in spatial coverage, these indices can be calculated using information provided by gridded databases, which are modeled based on interpolations from neighboring rain gauge stations at high spatial resolution. For Brazil, the Brazilian Daily Weather Gridded Data (BR-DWGD) dataset was developed, which stores daily climate variables over a 65-year time span (1961–2025) and has a spatial resolution of 0.1° × 0.1°. Thus, the objective of this study was to characterize the IAC of the Itapicuru River watershed using the BR-DWGD database, in order to analyze the behavior of rainfall anomalies and their temporal association with ENSO (El Niño-Southern Oscillation) climate oscillations. The index proved capable, in practical terms, of providing an overview of rainfall anomalies for the analyzed data series. Furthermore, it was observed that ENSO exerts a reasonable influence on the occurrence of precipitation anomalies, but this influence is not sufficient to explain extreme events. As a direction for future studies, we suggest investigating the relationship with other climate oscillations that occurred during the analyzed period and using other monitoring indices to enhance the robustness of the analyses. 2026-01-01T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/23576 Título: Desenvolvimento de um sistema integrado de preparação e análise de grãos e sementes via impressão 3d para agricutura familiar Autor(es): Cunha, José Inácio Santos Abstract: The increasing demand for agricultural production in Brazil highlights the need for lowcost alternatives for seed quality analysis, especially for small farmers, justifying the development of this project. The objective was to build a portable device integrating a diaphanoscope and a grain divider using FDM 3D printing technology. The prototype was designed in SolidWorks, printed with PLA and ABS, assembled in the laboratory, and aimed at enabling visual analysis of mechanical seed damage and homogenization of seed samples; parameters such as light uniformity and sample division efficiency were established in the testing protocol. The equipment showed proper assembly, lightness, functionality, and a total cost of around R$ 700.00 — significantly lower than commercial equipment — with potential for identifying cracks and internal seed damage; however, practical performance tests have not yet been conducted. It is concluded that the prototype is ready for practical validation, and further testing with different seeds and environments is recommended. 2025-05-28T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/23527 Título: Planta didática para monitoramento e controle de nível em tanques acoplados com sensores de baixo custo Autor(es): Barros, Adson Andrade Abstract: Liquid level monitoring and control is an important action for automated processes in agricultural systems, such as irrigation and fertigation, avoiding problems such as overflows and unexpected production shutdowns, and ensuring the safe continuity of operations. This work presents the development of a teaching system for level monitoring between two tanks, using digital float switch level sensors, analog ultrasonic level sensors, and three actuators: two 19W, 12V DC pumps and a 12V DC solenoid valve. An Arduino UNO microcontroller was used to manage all communication between the devices, calibrate the instrumentation, and automate level control between the two tanks. A graphical interface was also developed in SCADA software to facilitate automatic visualization and control of the teaching system by a human operator. The main objective of this work was to create a teaching system for communication between two tanks to facilitate the monitoring and control of fluid levels in both tanks, thus preventing liquid overflow and pumps from running dry. The idea is that the teaching system will serve as a bench-scale tool for theoretical and practical observations of fluid dynamics between two tanks of different heights, with the liquid flows generated by pumps. Several tests were performed, and the results showed that the integration of all components and systems worked, enabling practical study of fluid dynamics. The programmed interlocks prevented overflows in both tanks and prevented the pump from running dry—that is, without water in the piping, below the minimum level. The prototype demonstrated its potential and usefulness, paving the way for several future projects, whether in the diversification of automation or in level and/or flow control between the two tanks. It provides a favorable environment for practical testing and for observing theoretical studies, particularly regarding fluid dynamics between two tanks. It is hoped that these studies and implementations will, in the future, contribute to the pursuit of greater water efficiency and safety in liquid management. 2025-08-11T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/22402 Título: Concepção de alinhador e engate rápido para barra de tração do trator Autor(es): Rezende, Milena Luiza Lima de Abstract: Agricultural mechanization has been essential in promoting greater efficiency, safety, and productivity in the field. However, operations such as hitching and unhitching implements to the tractor drawbar are still performed manually on many farms, leading to operational risks and time losses. This work proposes the conceptual development of a quick hitch device with an automated aligner for agricultural tractors, based on a design methodology that allows revisions and iterations with previous stages for corrections and improvements when necessary, in compliance with Regulatory Standard NR 31. Technologies such as directional valves, electro-hydraulic, electropneumatic, and electric actuators were explored with the goal of eliminating the need for manual operator intervention. The results indicate a feasible solution adaptable to different tractor models, which can significantly improve ergonomics, safety, and the standardization of agricultural operations. The study also highlights the importance of innovation in the field through automation and the use of structured product development methodologies. 2025-05-19T00:00:00Z