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Post-fire debris flow hazard in the Zêzere glacial valley and Manteigas village (Estrela UNESCO Global Geopark, Portugal)

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dc.contributor.authorMelo, Raquel
dc.contributor.authorZêzere, José
dc.contributor.authorOliveira, Sérgio
dc.contributor.authorCezar, Lucas
dc.contributor.authorCastro, Emanuel
dc.contributor.authorVieira, Gonçalo
dc.date.accessioned2024-04-03T14:34:31Z
dc.date.available2024-04-03T14:34:31Z
dc.date.issued2024
dc.description.abstractA debris flow is a mixture of water and sediments that flows down channelized steep slopes, posing a potential hazard in mountainous regions due to high velocities (from very rapid to extremely rapid), high impact forces and extended run-out distances. The initiation of debris flows is generally attributed to the critical combination of three factors: steep slopes, unconsolidated sediments and water. Heavy rainfall, which can mobilize sediments ranging from millimetres to several meters in size, is the most common triggering factor. In areas recently affected by wildfires, debris flows are frequently initiated by surface erosion along with the entrainment of loose material. The consequences of fires include vegetation consumption, ash deposition, modifications in soil and rock properties and the emergence of water-repellent soils. Therefore, the lack of vegetation, as well as the reduction in infiltration rates on a burned watershed, can increase susceptibility to debris flows, as the amount of rainfall required for their triggering may be lower compared to areas unaffected by recent wildfires. For this same reason, debris flows can occur in areas lacking historical precedent activity. A global survey conducted across UNESCO Global Geoparks (UGGp) has revealed that slope instabilities, where debris flows are included, stand as the predominant geophysical hazard, impacting 70 % of the analysed UGGp (Fassoulas et al., 2018). On the other hand, wildfires emerged as the second most prevalent hazard after floods, affecting 46 % of these UGGp.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMelo, R., Zêzere, J.L., Oliveira, S.C., Cezar, L., Castro, E., & Vieira, G. (2024) Post-fire debris flow hazard in the Zêzere glacial valley and Manteigas village (Estrela UNESCO Global Geopark, Portugal). In: X.M. Pellicer, A.S. Aytaç, A. Amorfini, & S. Delaby (eds), Geohazards in European Geoparks (pp. 54-57). Akademisyen Kitabevipt_PT
dc.identifier.doi10.37609/akya.1159pt_PT
dc.identifier.isbn9786253997137
dc.identifier.urihttp://hdl.handle.net/10451/63927
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAkademisyen Kitabevipt_PT
dc.relation.publisherversionhttps://books.akademisyen.net/index.php/akya/catalog/view/1159/3295/75380pt_PT
dc.subjectPost-fire debris flowspt_PT
dc.subjectZêzere glacial valleypt_PT
dc.subjectSerra da Estrelapt_PT
dc.subjectUNESCO Global Geoparkspt_PT
dc.titlePost-fire debris flow hazard in the Zêzere glacial valley and Manteigas village (Estrela UNESCO Global Geopark, Portugal)pt_PT
dc.typebook part
dspace.entity.typePublication
oaire.citation.conferencePlaceAnkarapt_PT
oaire.citation.endPage57pt_PT
oaire.citation.startPage54pt_PT
oaire.citation.titleGeohazards in European Geoparkspt_PT
person.familyNameMelo
person.familyNameZêzere
person.familyNameOliveira
person.familyNameBrito Guapo Teles Vieira
person.givenNameRaquel
person.givenNameJosé Luís
person.givenNameSérgio
person.givenNameGonçalo
person.identifierH-9956-2013
person.identifierG-5958-2010
person.identifier.ciencia-idED1B-82B2-9E4F
person.identifier.ciencia-id511D-EE6B-47E3
person.identifier.ciencia-id1B10-8CE2-1F13
person.identifier.ciencia-id2519-6583-CAEA
person.identifier.orcid0000-0002-8111-8777
person.identifier.orcid0000-0002-3953-673X
person.identifier.orcid0000-0003-0883-8564
person.identifier.orcid0000-0001-7611-3464
person.identifier.ridO-1282-2018
person.identifier.ridM-8412-2016
person.identifier.scopus-author-id54893395400
person.identifier.scopus-author-id6507109389
person.identifier.scopus-author-id24779631800
person.identifier.scopus-author-id7005863976
rcaap.rightsclosedAccesspt_PT
rcaap.typebookPartpt_PT
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relation.isAuthorOfPublicationa49d5ad5-533a-4973-b8c6-a4f201b1cf62
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relation.isAuthorOfPublication7039fbb2-e1f8-4c3e-80f1-603b12d33c1c
relation.isAuthorOfPublication.latestForDiscovery7039fbb2-e1f8-4c3e-80f1-603b12d33c1c

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