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Minimum rainfall inter-event time to separate rainfall events in a low latitude semi-arid environment

2022-02-02Journal article Open access
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dc.contributor.authorBrasil, José Bandeira
dc.contributor.authorGuerreiro, Maria João
dc.contributor.authorAndrade, Eunice Maia de
dc.contributor.authorde Queiroz Palácio, Helba Araújo
dc.contributor.authorMedeiros, Pedro Henrique Augusto
dc.contributor.authorRibeiro Filho, Jacques Carvalho
dc.date.accessioned2022-07-26T15:15:31Z
dc.date.available2022-07-26T15:15:31Z
dc.date.issued2022-02-02
dc.description.abstractWater scarcity in dry tropical regions is expected to intensify due to climate change. Characterization of rainfall events is needed for a better assessment of the associated hydrological processes, and the proposition of adaptation strategies. There is still no consensus on the most appropriate method to separate rainfall events from a continuous database, although the minimum inter-event time (MIET) is a commonly used criterion. Semi-arid regions of low latitudes hold a distinct rainfall pattern compared to their equivalent at higher latitudes; these seasonally dry tropical forests experience strong spatial–temporal variability with intense short-duration rainfall events, which, in association with high energy surplus and potential evaporation, leads to an atmospheric water deficit. In this study, we identified the most adequate MIET based on rainfall data continuously measured at 5-min intervals over the last decade (2009–2020) in the semi-arid northeast of Brazil. The rainfall events were grouped according to different MIETs: 15 min, 1 h, 2 h, 3 h, 6 h, 12 h, and 24 h to determine rainfall depth, duration and intensity at intervals of 5, 30, and 60 min, time between events, and respective temporal distribution, with and without single tip events. Including single tip events in the dataset affected the number of rainfall events and respective characteristics up to a MIET of 3 h. A MIET of 6 h is the most appropriate to characterize the rainfall distribution in this tropical semi-arid region. Three classes were defined based on rainfall depth, duration, and intensity: I-small events (77% below 40 mm and 32 mm/h), II-high intensity events (3% between 36 and 76 mm/h), III-longer events of higher depth (20%). This study is useful for understanding how the MIET relates to other ecohydrological processes and provides more precise information on the rainfall characteristics at the event scale.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationBrasil JB, Guerreiro MS, Andrade EMd, de Queiroz Palácio HA, Medeiros PHA, Ribeiro Filho JC. Minimum Rainfall Inter-Event Time to Separate Rainfall Events in a Low Latitude Semi-Arid Environment. Sustainability. 2022; 14(3):1721. https://doi.org/10.3390/su14031721pt_PT
dc.identifier.doi10.3390/su14031721pt_PT
dc.identifier.eissn2071-1050
dc.identifier.urihttp://hdl.handle.net/10284/11034
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.subjectRainfall characteristicspt_PT
dc.subjectRain events separationpt_PT
dc.subjectTropical dry regionspt_PT
dc.subjectHydrological processespt_PT
dc.titleMinimum rainfall inter-event time to separate rainfall events in a low latitude semi-arid environmentpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue3pt_PT
oaire.citation.startPage1721pt_PT
oaire.citation.titleSustainabilitypt_PT
oaire.citation.volume14pt_PT
person.familyNameGuerreiro
person.givenNameMaria
person.identifier.ciencia-id1216-4260-3FD7
person.identifier.orcid0000-0001-6774-9348
person.identifier.scopus-author-id23024471700
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationd9ab10bc-ed17-4df2-9efc-90a3e2d0852a
relation.isAuthorOfPublication.latestForDiscoveryd9ab10bc-ed17-4df2-9efc-90a3e2d0852a

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