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Defining evacuation travel times and safety areas in a debris flow hazard scenario

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dc.contributor.authorMelo, Raquel
dc.contributor.authorZêzere, José
dc.contributor.authorOliveira, Sérgio
dc.contributor.authorGarcia, Ricardo A C
dc.contributor.authorOliveira, Sandra
dc.contributor.authorPereira, Susana
dc.contributor.authorPiedade, Aldina
dc.contributor.authorSantos, Pedro Pinto
dc.contributor.authorvan Asch, Theo
dc.date.accessioned2020-02-03T16:46:16Z
dc.date.available2020-02-03T16:46:16Z
dc.date.issued2020
dc.description.abstractDebris flows are one of the most hazardous types of landslides in mountain regions. In the upper part of the Zêzere valley (Serra da Estrela, Portugal) several debris flows events occurred in the last 200 years, some of them causing loss of lives and material damages. In this work, a methodology for pedestrian evacuation modelling, in a debris flow hazard scenario, was implemented. A dynamic run-out model, developed in previous studies, was used to evaluate the debris flows velocities, thickness of the deposits and extent of the mobilized material. The buildings potentially affected by the impact of debris flows were identified and the potentially exposed population was estimated by applying a dasymetric distribution. The results lead to the conclusion that, in the study area, the elderly are those who are most exposed to debris flows. Furthermore, the time lapse between the debris flows initiation and the arrival at the buildings at risk was estimated, allowing to account for the overall number of buildings where the evacuation time takes longer than the debris flows arrival. Additionally, the safe areas within the study area were identified, and several safe public buildings with the capacity to gather a large number of persons were selected. Considering that the study area is located in a mountain region, characterized by steep slopes, the evacuation modelling was performed based on an anisotropic approach, in order to consider the influence of slope direction on travel costs. At the end, three pedestrian evacuation travel time scenarios, based on different walking speeds to accommodate residents with different ages in safer places, were compared and the results mapped. The implemented methodology is not local dependent, which allows its reproduction elsewhere.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMelo, R., Zêzere, J.L., Oliveira, S.C., Garcia, R.A.C., Oliveira, S., Pereira, S., Piedade. A., Santos, P.P., & Asch, T.W.J. van (2020). Defining evacuation travel times and safety areas in a debris flow hazard scenario. Science of The Total Environment, 712. https://doi.org/10.1016/j.scitotenv.2019.136452pt_PT
dc.identifier.doi10.1016/j.scitotenv.2019.136452pt_PT
dc.identifier.issn0048-9697
dc.identifier.urihttp://hdl.handle.net/10451/41544
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherNCBIpt_PT
dc.relationUIDB/ 00295/2020pt_PT
dc.relationLandslide Early Warning soft technology prototype to improve community resilience and adaptation to environmental change
dc.relationCENTRO-45-2015-1pt_PT
dc.relation.publisherversionhttps://www.ncbi.nlm.nih.gov/pubmed/31931203pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectPedestrian evacuation modellingpt_PT
dc.subjectDebris flowpt_PT
dc.subjectBuildings at riskpt_PT
dc.subjectExposed populationpt_PT
dc.subjectEvacuation travel timespt_PT
dc.titleDefining evacuation travel times and safety areas in a debris flow hazard scenariopt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberPTDC/GES-AMB/30052/2017
oaire.awardTitleLandslide Early Warning soft technology prototype to improve community resilience and adaptation to environmental change
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FGES-AMB%2F30052%2F2017/PT
oaire.citation.endPage13pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleScience of the Total Environmentpt_PT
oaire.citation.volume712pt_PT
oaire.fundingStream3599-PPCDT
person.familyNameMelo
person.familyNameZêzere
person.familyNameOliveira
person.familyNameGarcia
person.familyNameOliveira
person.familyNameda Silva Pereira
person.familyNamePiedade
person.familyNameSantos
person.givenNameRaquel
person.givenNameJosé Luís
person.givenNameSérgio
person.givenNameR.A.C.
person.givenNameSandra
person.givenNameSusana
person.givenNameAldina
person.givenNamePedro Pinto
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person.identifier.ridO-1282-2018
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project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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