The study of changes in hydrological data series is of great scientific and practical importance for water resources systems, since these are normally projected based on the assumption that time series is statistically stationary. However, such assumption may not be verified when aspects as changes or climatic variability are considered. In this sense, the present study sought to identify trends in maximum rainfall intensities in Belo Horizonte (MG) and propose, in view of the observed results, a new intensity-duration-frequency (IDF) curve from the perspective of non-stationarity. For the trend analysis, statistical tests were applied, and an adaptation of the concept “Minimax Design Life Level” was proposed to quantify rainfall intensities and fit a non-stationary IDF curve. As a result, different trends were detected, with an increase in rainfall intensities for durations equal to or less than 1 hour starting in 2000. Regarding the IDF relationships, the obtained rain intensities were up to 48% higher than current estimates. Our results emphasize the need to periodically review IDF relationships in order to avoid under or overestimation in the design of hydraulic structures.
An increasing concern among water resources managers is the search for ways to improve reservoir sizing techniques. A simple technical and scientifically based technique is the sequent peak method, which has been widely disseminated, but presents limitations with respect to the length of the available data series. The objective of this study was to propose modifications to the sequent peak method to overcome the limitations related to the impossibility of associating the reservoir storage capacity with return periods different from the length of the data series. Storage capacities were estimated for every year, considering gauge stations located in the Urucuia River Basin, based on the sequent peak method. In order to associate such capacities with a frequency factor (return period), the Gumbel distribution was applied to the estimated storage values. This association with return periods which differ from the number of years in the data series showed great applicability
O curso de engenharia civil é a modalidade da engenharia o qual possuiu a segunda maior quantidade de concluintes em 2011 no Brasil. Este alto contingente de novos engenheiros foi possivelmente absorvido pela indústria da construção civil, sobretudo devido ao momento econômico ascendente em que o país encontrava-se e à participação do Brasil como país sede da copa e das olimpíadas. Também, em 2011, o curso de engenharia civil apresentou a maior quantidade de ingressantes dentre as engenharias, sendo também um dos cursos mais concorridos. Esta alta demanda pelo curso, concomitante a crise de 2015 repercutiram na escassez de empregos no mercado de trabalho em todas as subáreas da engenharia civil, inclusive no setor de geotecnia cuja aplicação normalmente é limitada durante os cursos de graduação. Este fator somado ao desinteresse dos discentes resulta em um baixo contingente de mão de obra qualificada e jovem para obras de geotecnia, tornando-a uma área majoritariamente integrada por engenheiros mais experientes. Tais fatores impulsionaram estudantes de graduação do curso de engenharia civil da Pontifícia Universidade Católica de Minas Gerais (PUC-MG) à criação da Liga Acadêmica de Geotecnia (LAG) com o propósito de desenvolver atividades acadêmicas, científicas e extensivas a fim de aprimoramento e maior preparação tanto para a esfera profissional, quanto para o âmbito acadêmico. Portanto, este artigo apresenta a concepção da liga acadêmica de Engenharia Civil na PUC-MG unidade Barreiro e as principais mudanças que este grupo já estimulou na formação dos estudantes e até mesmo na qualidade do curso.
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