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dc.creatorSantos, Hersília de Andrade e-
dc.creatorPompeu, Paulo dos Santos-
dc.creatorKenji, Danilo Okuma Lessa-
dc.date.accessioned2020-03-27T12:54:11Z-
dc.date.available2020-03-27T12:54:11Z-
dc.date.issued2011-07-28-
dc.identifier.citationSANTOS, H. de A. e; POMPEU, P. dos S.; KENJI, D. O. L. et al. Changes in the flood regime of São Francisco River (Brazil) from 1940 to 2006. Regional Environmental Change, [S.l.], v. 12, p. 123-132, July 2011. DOI: 10.1007/s10113-011-0240-y.pt_BR
dc.identifier.urihttps://link.springer.com/article/10.1007/s10113-011-0240-ypt_BR
dc.identifier.urihttp://repositorio.ufla.br/jspui/handle/1/39469-
dc.description.abstractFlow regulation causes various environmental impacts in the downstream reaches of impounded rivers. The São Francisco River (SF) basin is Brazil’s third most important watershed. Several dams have been built in its course in the last four decades, mostly for flow regulation and hydropower generation. This paper presents an evaluation of historical changes in the flood regime. Three regions of the SF River basin, which are under the influence of different levels of regulation, were studied: the lower, middle, and upper SF River. The components of magnitude, frequency, and duration of floods were quantified for each region from 1940 to 1960 (prior to the construction of the first dam) and from 1986 to 2006 (after the last dam). The results have shown the inexistence of big floods in the downstream areas, decreasing durations of small floods as well as significant changes in the annual seasonality of floods. Reductions in the flood frequency were verified in all stretches, even in non-regulated systems, such as the lower Velhas River. The climate variation, which occurred in both period, was not able to explain the changes in the flood regime of São Francisco River; therefore, dams and other anthropogenic activity are the main factors promoting the temporal variability of streamflows in the São Francisco basin.pt_BR
dc.languageen_USpt_BR
dc.publisherSpringerpt_BR
dc.rightsrestrictAccesspt_BR
dc.sourceRegional Environmental Changept_BR
dc.subjectEnvironmental flowspt_BR
dc.subjectFlood frequencypt_BR
dc.subjectFlow regulationpt_BR
dc.subjectSão Francisco River (Brazil)pt_BR
dc.subjectVelhas River (Brazil)pt_BR
dc.titleChanges in the flood regime of São Francisco River (Brazil) from 1940 to 2006pt_BR
dc.typeArtigopt_BR
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