Hydrological responses in equatorial watersheds indicated by Principal Components Analysis (PCA) - study case in Atrato River Basin (Colombia)

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dc.contributor.authorBetancur, Sebastian Balbin [UNESP]
dc.contributor.authorGastmans, Didier [UNESP]
dc.contributor.authorVasquez, Katherine Vasquez
dc.contributor.authorSantarosa, Lucas Vituri [UNESP]
dc.contributor.authorSantos, Vinicius dos [UNESP]
dc.contributor.authorKirchheim, Roberto Eduardo
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionServ Geol Brasil
dc.date.accessioned2021-06-25T12:22:37Z
dc.date.available2021-06-25T12:22:37Z
dc.date.issued2020-01-01
dc.description.abstractThe Atrato river basin is located in the Pacific fringe of Colombia, region with one of the highest precipitation rates in the world. The main purpose of this study is to determine the dominant processes in the hydrological responses along 17 sub-basins within the basin using principal component analysis. Watersheds located at the headwater presented a fast or medium response to the precipitation events, while higher flow homogeneity was observed in watersheds located at the lower portions of the basin. Three principal components were responsible for explaining 85.18% of the total variance. The component PC1 revealed the largest contributions for low flow behavior, being associated to precipitation, characteristic discharge values, compactness index, soil coverage and soil coarse textures. The component PC2 was assigned to the geological variables, fine and average texture soil and the average basin slope. Finally, the component PC3 has shown to be related to high flow patterns (maximum characteristic discharge values Q(5) and Q(1)), igneous rocks and length of the basin. Highest specific discharge was associated to alluvial deposits and forest cover, whereas the slope was considered determinant for the run-off generation.en
dc.description.affiliationUniv Estadual Paulista, Ctr Estudos Ambientais, Rio Claro, SP, Brazil
dc.description.affiliationUniv Sao Paulo, Lab Hidrol Florestal, Piracicaba, SP, Brazil
dc.description.affiliationServ Geol Brasil, Sao Paulo, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Ctr Estudos Ambientais, Rio Claro, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipIdFAPESP: 2018/06666-4
dc.format.extent12
dc.identifierhttp://dx.doi.org/10.1590/2318-0331.252020190165
dc.identifier.citationRbrh-revista Brasileira De Recursos Hidricos. Porte Alegre: Assoc Brasileira Recursos Hidricos-abrh, v. 25, 12 p., 2020.
dc.identifier.doi10.1590/2318-0331.252020190165
dc.identifier.fileS2318-03312020000100241.pdf
dc.identifier.issn1414-381X
dc.identifier.scieloS2318-03312020000100241
dc.identifier.urihttp://hdl.handle.net/11449/209569
dc.identifier.wosWOS:000580447000001
dc.language.isoeng
dc.publisherAssoc Brasileira Recursos Hidricos-abrh
dc.relation.ispartofRbrh-revista Brasileira De Recursos Hidricos
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectAtrato river basin
dc.subjectFlow duration curves
dc.subjectPrincipal component analysis
dc.subjectColombia
dc.titleHydrological responses in equatorial watersheds indicated by Principal Components Analysis (PCA) - study case in Atrato River Basin (Colombia)en
dc.typeArtigo
dcterms.rightsHolderAssoc Brasileira Recursos Hidricos-abrh
unesp.author.orcid0000-0002-1340-3373[2]
unesp.author.orcid0000-0001-7180-7715[4]

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