https://ri.ufs.br/jspui/handle/riufs/121 Sat, 25 Apr 2026 13:14:07 GMT 2026-04-25T13:14:07Z https://ri.ufs.br/jspui/handle/riufs/24588 Título: Avaliação de estratégias de modelagem guiada por dados para previsão de vazão em rio sergipano Autor(es): Santos, José Rafael Santana; Celeste, Alcigeimes Batista Abstract: Among several streamflow forecasting techniques, data-driven models (DDMs) are widely used. They employ a database formed by historical input (precipitation and streamflow) and output (streamflow) variables to perform the prediction. Artificial neural networks (ANNs) are the most common types of DDMs, and are typically more accurate than other empirical models, but have the disadvantage of not being sufficiently transparent. One of the machine-learning methods that do not have this problem is the so-called “instance-based learning” (IBL). The KNN algorithm is an example of IBL. This research applies and proposes variations of the KNN model in order to forecast streamflows in a river of the state of Sergipe, Brazil. The results are compared to simulations carried out by the use of artificial neural networks and indicate the superiority of the ANNs, but also show satisfactory forecasts of the KNN. Mon, 01 Sep 2014 00:00:00 GMT https://ri.ufs.br/jspui/handle/riufs/24588 2014-09-01T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/24193 Título: Viabilidade do uso de água residuária tratada na irrigação da cultura do rabanete (Raphanus sativus L.) Autor(es): Dantas, Iasmine Louise de Almeida; Faccioli, Gregorio Guirado; Mendonça, Luciana Coêlho; Nunes, Tatiana Pacheco; Viegas, Pedro Roberto Almeida; Santana, Larissa Oliveira Gama de Abstract: The use of treated wastewater for irrigation may become an alternative for regions facing water scarcity. This study aimed to evaluate the effects of wastewater reuse in the cultivation of radish (Raphanus sativus L.). The experiment was conducted in the greenhouse of the Department of Agricultural Engineering (DEA), located at the Federal University of Sergipe/Campus of São Cristóvão from August to September 2011. The effluent was collected at the Sewage Treatment Plant (WWTP) Rosa Elze, located in the municipality of São Cristóvão/SE. Irrigation was performed using five different dilutions, and was accomplished using the method of the Food and Agriculture Organization (FAO) 56. The experimental design was a completely randomized design (CRD) with five replications and two plants per useful plot. The study evaluated height, fresh and dry shoot matter, length and fresh weight of root, fruit diameter and number of leaves. The data were subjected to ANOVA and means were compared by the Tukey test at 5 % probability, with no significant difference. Regarding the microbiological quality of the bulb, the results of the enumeration of coliforms, mesophilic aerobic bacteria and the detection of Salmonella demonstrate that the radish is within the standards established by legislation. Sat, 01 Mar 2014 00:00:00 GMT https://ri.ufs.br/jspui/handle/riufs/24193 2014-03-01T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/22920 Título: Mapeamento do potencial de erosão laminar na Bacia do Rio Japaratuba, SE, via SIG Autor(es): Aragão, Ricardo de; Almeida, José Antonio Pacheco de; Figueiredo, Eduardo Eneas de; Srinivasan, Vajapeyam Srirangachar Abstract: Soil erosion is a natural phenomenon that reduces soil fertility and causes a great impact on agricultural areas. Laminar erosion is characterized by the removal of the top soil fairly uniformly as well as its nutrients, which is accelerated by human activities. To minimize the impacts it is necessary to adopt an adequate soil management that takes into account the type of the soil, relief, and vegetation cover. The soil management can be aided by mapping the erosive potential of a region using GIS tools. In this work, the technique that was used for mapping the erosive potential in the Japaratuba River Basin (1685 km2 ) located in the State of Sergipe is presented. The results show that 48.71% of the basin area lie within medium and high erosive potentials zones, suggesting the inadequate land use for the soil types and relief within the basin. Fri, 01 Jul 2011 00:00:00 GMT https://ri.ufs.br/jspui/handle/riufs/22920 2011-07-01T00:00:00Z https://ri.ufs.br/jspui/handle/riufs/18888 Título: Reúso de águas residuais na irrigação: mapeamento sistemático na literatura Autor(es): Santos, Laíssy Messias dos; Sousa, Íkaro Damião Hora; Torres, Taiane Aparecida Santos; Mendonça, Luciana Coêlho Abstract: Water is an essential resource for meeting human needs, but rising temperatures are making it scarce in parts of the world. Pollution of water sources, due to the lack of sewage treatment, is also a factor that influences the quantity and quality of water available. Given this reality, this study set out to develop a systematic mapping of the literature in order to analyze the publications of articles on the reuse of wastewater for irrigation. The SCOPUS database was used to search for articles, using the keywords: "Wastewater" or "Graywater", "Irrigation", "Agriculture" and "Reuse". The results showed that in the titles of the publications, the most used keywords were: "Irrigation", "Wastewater", "Water recovered" and "Agricultural irrigation" and of the keywords were: "Wastewater", "Agriculture", "Water reuse", "Irrigation" and "Wastewater reuse". It was also noted that, according to the number of publications, the articles found are current studies and that the year 2020 had the highest number of publications. In terms of the topic covered, the United States stood out from the other countries for having the highest publication rate, 15% of the total. The journal Science of the Total Environment had the highest number of articles on the subject, 14% of the total published. The quality parameters commonly studied were: COD (12%), nitrogen (10%), conductivity (9%), suspended solids (9%), phosphorus (8%), pH (8%) and BOD (7%). The study showed that the technique is a suitable option for the proper disposal of effluents. Sun, 01 Jan 2023 00:00:00 GMT https://ri.ufs.br/jspui/handle/riufs/18888 2023-01-01T00:00:00Z