MODELING OF PHOSPHORUS LOSSES BY WATER EROSION

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dc.contributor.authorFarias, Vera L. da S. [UNESP]
dc.contributor.authorMartins Filho, Marcilio V. [UNESP]
dc.contributor.authorPaula, Daniela T. de [UNESP]
dc.contributor.authorSiqueira, Diego S. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-11-26T15:47:45Z
dc.date.available2018-11-26T15:47:45Z
dc.date.issued2018-01-01
dc.description.abstractPhosphorus losses in runoff water and eroded sediment may increase the risk of eutrophication. Erosion prediction models can be used to assess and quantify nutrient losses and transport in different soil management scenarios. This study aimed to assess the performance of models to estimate the losses of available phosphorus in eroded sediments and assess their spatial variability pattern. The experiment was installed on a eutrophic Red Ultisol located in Tabapua, northwestern Sao Paulo State, Sao Domingos Stream Watershed. Aiming at estimating and validating the models, measurements were made from 2007 to 2015 at 17 observation points (slopes), determining soil phosphorus content (P-soil), eroded sediments (P-sed), and enrichment rate (ERsed). The models applied to estimate the enrichment rates of phosphorus in the eroded sediment and runoff are efficient when in use with the predictions of the model Water Erosion Prediction Project (WEPP). The enrichment rates obtained presented a Nash-Sutcliffe (NS) coefficient close to 1. Losses of soluble phosphorus in runoff above 0.02 mg L-1, a critical value for eutrophication, can be obtained in 81% of the watershed area with a probability higher than 75%.en
dc.description.affiliationUniv Estadual Paulista, Jaboticabal, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Jaboticabal, SP, Brazil
dc.format.extent149-157
dc.identifierhttp://dx.doi.org/10.1590/1809-4430-Eng.Agric.v38n1p149-157/2018
dc.identifier.citationEngenharia Agricola. Jaboticabal: Soc Brasil Engenharia Agricola, v. 38, n. 1, p. 149-157, 2018.
dc.identifier.doi10.1590/1809-4430-Eng.Agric.v38n1p149-157/2018
dc.identifier.fileS0100-69162018000100149.pdf
dc.identifier.issn0100-6916
dc.identifier.scieloS0100-69162018000100149
dc.identifier.urihttp://hdl.handle.net/11449/160175
dc.identifier.wosWOS:000428124100020
dc.language.isoeng
dc.publisherSoc Brasil Engenharia Agricola
dc.relation.ispartofEngenharia Agricola
dc.relation.ispartofsjr0,305
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectWEPP model
dc.subjectenrichment rate
dc.subjectspatial variability
dc.titleMODELING OF PHOSPHORUS LOSSES BY WATER EROSIONen
dc.typeArtigo
dcterms.rightsHolderSoc Brasil Engenharia Agricola

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