Recent deforestation causes rapid increase in river sediment load in the Colombian Andes

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dc.citation.journalTitleAnthropocene
dc.contributor.authorRestrepo, J.D.spa
dc.contributor.authorKettner, A.J.spa
dc.contributor.authorSyvitski, J.P.M.spa
dc.contributor.departmentUniversidad EAFIT. Departamento de Geologíaspa
dc.contributor.researchgroupCiencias del Marspa
dc.date.accessioned2021-03-23T20:20:26Z
dc.date.available2021-03-23T20:20:26Z
dc.date.issued2015-06-01
dc.description.abstractHuman induced soil erosion reduces soil productivity; compromises freshwater ecosystem services, and drives geomorphic and ecological change in rivers and their floodplains. The Andes of Colombia have witnessed severe changes in land-cover and forest loss during the last three decades with the period 2000 and 2010 being the highest on record. We address the following: (1) what are the cumulative impacts of tropical forest loss on soil erosion? and (2) what effects has deforestation had on sediment production, availability, and the transport capacity of Andean rivers? Models and observations are combined to estimate the amount of sediment liberated from the landscape by deforestation within a major Andean basin, the Magdalena. We use a scaling model BQART that combines natural and human forces, like basin area, relief, temperature, runoff, lithology, and sediment trapping and soil erosion induced by humans. Model adjustments in terms of land cover change were used to establish the anthropogenic-deforestation factor for each of the sub-basins. Deforestation patterns across 1980-2010 were obtained from satellite imagery. Models were employed to simulate scenarios with and without human impacts. We estimate that, 9% of the sediment load in the Magdalena River basin is due to deforestation; 482 Mt of sediments was produced due to forest clearance over the last three decades. Erosion rates within the Magdalena drainage basin have increased 33% between 1972 and 2010; increasing the river's sediment load by 44 Mt y-1. Much of the river catchment (79%) is under severe erosional conditions due in part to the clearance of more than 70% natural forest between 1980 and 2010. © 2015 Elsevier Ltd. All rights reserved.eng
dc.identifierhttps://eafit.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=1763
dc.identifier.doi10.1016/j.ancene.2015.09.001
dc.identifier.issn22133054
dc.identifier.otherWOS;000381903400002
dc.identifier.otherSCOPUS;2-s2.0-84956587445
dc.identifier.urihttp://hdl.handle.net/10784/26894
dc.language.isoengeng
dc.publisherElsevier Ltd
dc.relation.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84956587445&doi=10.1016%2fj.ancene.2015.09.001&partnerID=40&md5=ba931ffa87577c6f83e5ab6d6b81915e
dc.rightshttps://v2.sherpa.ac.uk/id/publication/issn/2213-3054
dc.sourceAnthropocene
dc.subject.keywordanthropogenic effecteng
dc.subject.keyworddeforestationeng
dc.subject.keyworddrainage basineng
dc.subject.keywordforest dynamicseng
dc.subject.keywordland covereng
dc.subject.keywordlithologyeng
dc.subject.keywordsatellite imageryeng
dc.subject.keywordsediment budgeteng
dc.subject.keywordsediment transporteng
dc.subject.keywordsoil erosioneng
dc.subject.keywordspatial analysiseng
dc.subject.keywordtropical foresteng
dc.subject.keywordAndeseng
dc.subject.keywordColombiaeng
dc.subject.keywordMagdalena Basineng
dc.titleRecent deforestation causes rapid increase in river sediment load in the Colombian Andeseng
dc.typeinfo:eu-repo/semantics/articleeng
dc.typearticleeng
dc.typeinfo:eu-repo/semantics/publishedVersioneng
dc.typepublishedVersioneng
dc.type.localArtículospa

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