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Impacts of wildfire and postā€fire land management on hydrological and sediment processes in a humid Mediterranean headwater catchment

2020-12Journal article Open access
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dc.contributor.authorNunes, JoĆ£o Pedro
dc.contributor.authorBernardā€Jannin, LĆ©onard
dc.contributor.authorRodrĆ­guezā€Blanco, MarĆ­a Luz
dc.contributor.authorBoulet, Anne-Karine
dc.contributor.authorSantos, Juliana Marisa
dc.contributor.authorKeizer, Jacob
dc.date.accessioned2020-11-17T14:17:19Z
dc.date.available2021-06-01T00:30:11Z
dc.date.issued2020-12
dc.description.abstractThe extensive afforestation of the Mediterranean rim of Europe in recent decades has increased the number of wildfire disturbances on hydrological and sediment processes, but the impacts on headwater catchments is still poorly understood, especially when compared with the previous agricultural landscape. This work monitored an agroforestry catchment in the north-western Iberian Peninsula, with plantation forests mixed with traditional agriculture using soil conservation practices, for one year before the fire and for three years afterwards, during which period the burnt area was plowed and reforested. During this period, continuous data was collected for meteorology, streamflow and sediment concentration at the outlet, erosion features were mapped and measured after major rainfall events, and channel sediment dynamics were monitored downstream from the agricultural and the burnt forest area. Data from 202 rainfall events with over 10 mm was analysed in detail. Results show that the fire led to a notable impact on sediment processes during the first two post-fire years, but not on streamflow processes; this despite the small size of the burnt area (10% of the catchment) and the occurrence of a severe drought in the first year after the fire. During this period, soil loss at the burnt forest slopes was much larger than that at most traditionally managed fields, and, ultimately, led to sediment exhaustion. At the catchment scale, storm characteristics were the dominant factor behind streamflow and sediment yield both before and after the fire. However, the data indicated a shift from detachment-limited sediment yield before the fire, to transport-limited sediment yield afterwards, with important increases in streamflow sediment concentration. This indicates that even small fires can temporarily change sediment processes in agroforestry catchments, with potential negative consequences for downstream water quality.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1002/hyp.13926pt_PT
dc.identifier.urihttp://hdl.handle.net/10451/44907
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherWileypt_PT
dc.relationFCOMP-01-0124-FEDER-008534pt_PT
dc.relationCentre for Ecology, Evolution and Environmental Changes
dc.relationCentre for Environmental and Marine Studies
dc.relationIF/00586/2015pt_PT
dc.relationIF/01465/2015pt_PT
dc.relation.publisherversionhttp://dx.doi.org/10.1002/hyp.13926pt_PT
dc.subjectWildfirept_PT
dc.subjectPost-fire managementpt_PT
dc.subjectHydrological responsept_PT
dc.subjectSediment processespt_PT
dc.subjectMediterraneanpt_PT
dc.subjectHeadwater catchmentpt_PT
dc.titleImpacts of wildfire and postā€fire land management on hydrological and sediment processes in a humid Mediterranean headwater catchmentpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentre for Ecology, Evolution and Environmental Changes
oaire.awardTitleCentre for Environmental and Marine Studies
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FBIA%2F00329%2F2019/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FAMB%2F50017%2F2019/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F39721%2F2007/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F87571%2F2012/PT
oaire.citation.titleHydrological Processespt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStreamSFRH
oaire.fundingStreamSFRH
person.familyNameCarvalho Nunes
person.familyNameBoulet
person.familyNameKeizer
person.givenNameJoĆ£o Pedro
person.givenNameAnne-Karine
person.givenNameJan Jacob
person.identifierA-5497-2011
person.identifierE-8938-2015
person.identifier.ciencia-id2911-5CBD-5FA9
person.identifier.ciencia-id1115-F575-1B99
person.identifier.ciencia-id5614-6623-BF58
person.identifier.orcid0000-0002-0164-249X
person.identifier.orcid0000-0002-6453-1535
person.identifier.orcid0000-0003-4833-0415
person.identifier.scopus-author-id7102878032
person.identifier.scopus-author-id7005301640
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundaĆ§Ć£o para a CiĆŖncia e a Tecnologia
project.funder.nameFundaĆ§Ć£o para a CiĆŖncia e a Tecnologia
project.funder.nameFundaĆ§Ć£o para a CiĆŖncia e a Tecnologia
project.funder.nameFundaĆ§Ć£o para a CiĆŖncia e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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