http://repositorio.ufc.br/handle/riufc/460 2026-06-19T14:32:17Z http://repositorio.ufc.br/handle/riufc/86776 Título: Uma abordagem multicritério para a construção de índices globais de desempenho como subsídio à regulação dos serviços hídricos de irrigação Autor(es): Amorim, Eliandro Lima de Abstract: Irrigation accounts for approximately 70% of global freshwater consumption and, in Brazil, for approximately 52% of total use, with Public Irrigation Projects (PPIs) managed by CODEVASF and DNOCS playing a strategic role in the regional development of the Northeast and the São Francisco Valley. Less than half of these projects achieve satisfactory technical efficiency, and the absence of synthetic evaluation instruments restricts benchmarking and performance-based regulation. This study proposes a methodology for constructing global performance indices for irrigation water services, supported by Multi-Criteria Decision Analysis (MCDA) methods. This quantitative, exploratory, and descriptive research analyzed 26 Public-Private Partnerships (PPIs), 20 managed by CODEVASF and 6 by DNOCS, distributed across seven Brazilian states, using data extracted from institutional reports from 2020. Seven indicators comprised the analytical basis: Water Profitability (RA), Water Operational Efficiency (EOA), Financial Insufficiency Index (ISF), Default Rate (IAD), Land Use Index (IUS), Area Profitability (RAR), and Job Creation (GE). Three multi-criteria methods were integrated: PROMETHEE II and TOPSIS with Monte Carlo simulation (1,000 iterations) and TOPSIS with entropy weighting. The projects revealed significant heterogeneity in both economic and operational dimensions, confirming the relevance of the adopted multi-criteria approach. The convergence between the methods proved to be consistent: Sen. Nilo Coelho, Maniçoba, Brumado, and Curaçá stood out as projects of excellence, while Cotinguiba/Pindoba, Boacica, and Estreito systematically occupied the most critical positions. The Pearson correlation r = 0.851 between TOPSIS-MC and TOPSIS-Entropy, combined with the stability of the rankings in the simulations, proved the robustness of the constructed indices. The results demonstrate that the proposed methodological integration converts the complexity of water management into objective and comparable metrics, providing concrete technical support to the regulatory action of ANA and to the advancement of the National Irrigation Policy. Tipo: Dissertação 2026-01-01T00:00:00Z http://repositorio.ufc.br/handle/riufc/86745 Título: Controle executivo de estacas raiz a partir de medidas de campo Autor(es): Lima, Diana Rodrigues de; Moura, Alfran Sampaio Abstract: During the execution of the foundations of buildings, the evaluation of the failure load is commonly determined by specific methods, which vary depending on the type of pile. The control of root piles are usually executed by load tests. This paper proposes an empirical formulation for prediction of failure load of root piles, using some variables that are monitored during the execution of the piles, using a digital speedometer. Therefore, slow static load test in three root piles monitored with diameters of 350 to 410 mm were conducted. Several combinations between portions of end bearing load capacity, side friction load capacity, and the monitored variables, were tested using computer programs as Excel and Maple. Afterwards, an equation for the prediction of the failure load of the piles tested was estimated, as a function of the monitored variables, according to polynomial relations, exponential, logarithmic and linear combination, referencing to the value obtained in Van der Veen’s method (1953). It was found that there is a correlation between the failure load and the monitored variables, and the results obtained by the proposed equation were concordant with the reference values for the tested piles. Tipo: Artigo de Periódico 2016-01-01T00:00:00Z http://repositorio.ufc.br/handle/riufc/86744 Título: Modelo de previsão de recalques em estacas hélice contínua, metálicas e escavadas através de redes neurais artificiais Autor(es): Dantas Neto, Silvrano Adonias; Silveira, Mariana Vela; Anjos, Gerson Jacques Miranda dos; Moura, Alfran Sampaio Abstract: This work presents a method for pile settlement prediction using an artificial neural network(ANN) known as perceptron. Results from 199 SPT and static load tests carried out on continuous flight auger,steel and bored piles were used in the model development. The ANN model allows the prediction ofsettlements as a function of the pile type and geometry (diameter and length), the stratigraphy andcharacteristics of soils defined by SPT test results, and the applied load. The architecture that presented thebest performance was A10:14:8:4:2:1, with a correlation coefficient of 0.94. The results were compared tothose obtained in previous works and by other authors that also developed settlement prediction models usingANNs. This comparison has shown that the proposed model is able to predict settlements more accurately Tipo: Artigo de Periódico 2016-01-01T00:00:00Z http://repositorio.ufc.br/handle/riufc/86743 Título: Previsão de curvas de retenção por correlações com propriedades dos solos Autor(es): Moura, Alfran Sampaio; Silva Filho, Francisco Chagas da; Dantas Neto, Silvrano Adonias Abstract: This paperpresents, at first, an abbreviation revision concerning basic concepts about the suction and the capacity of retention of soils unsaturated. Adatabase of 50 characteristic curves was set up, whose curves were adjusted for 6models proposed in the literature.Parameters ofadjustment of the models were determined bythe reduction of erroramong the experimental curves in aniterative way. Subsequently, correlations were accomplished between the parameters of adjustment of the models and some propertiesof the soils. Finally, there were undertaken comparisons among the experimental characteristic curves of some soils and the corresponding estimated curvesfrom the adjusted models. The models of Willians et al.(1983), Brooks and Corey (1964), Fredlund and Xing (1994) and Gardner (1958)provided the most consistentadjustments. Tipo: Artigo de Periódico 2017-01-01T00:00:00Z