2019
DOI: 10.1590/0102-77863340242
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Abstract: In this work we study the influence of the Sobradinho dam construction on daily streamflow of São Francisco River, Brasil, by analyzing long-range correlations in magnitude and sign time series obtained from streamflow anomalies, using the Detrended Fluctuation Analysis (DFA) method. The magnitude series relates to the nonlinear properties of the original time series, while the sign series relates to the linear properties. The streamflow data recorded during the period 1929-2009, were divided in the periods pr… Show more

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Cited by 4 publications
(6 citation statements)
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“…The recent development of computational power and data acquisition provided us with tools and new methods to study temporal and spatial variability in hydrological variables [20]. Different studies [4,20] provided evidence that the time series of the Sobradinho reservoir presents nonlinear behavior, particularly after its construction. Therefore, the wavelet transform was applied in this paper as a pre-processing tool to extract significant features such as the low-frequency variability and to gain insight into time-varying characteristics that the streamflow time series may present.…”
Section: Discussionmentioning
confidence: 99%
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“…The recent development of computational power and data acquisition provided us with tools and new methods to study temporal and spatial variability in hydrological variables [20]. Different studies [4,20] provided evidence that the time series of the Sobradinho reservoir presents nonlinear behavior, particularly after its construction. Therefore, the wavelet transform was applied in this paper as a pre-processing tool to extract significant features such as the low-frequency variability and to gain insight into time-varying characteristics that the streamflow time series may present.…”
Section: Discussionmentioning
confidence: 99%
“…The gauge station is located approximately 95 km upstream of the Sobradinho dam. This station is likely to suffer minor effects of the Três Marias reservoir, the largest reservoir upstream of Sobradinho, and located about 1087 km from Sobradinho [4].…”
Section: Study Area and Datamentioning
confidence: 99%
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