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Integration of spatial and temporal data for the definition of different landslide hazard scenarios in the area north of Lisbon (Portugal)

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dc.contributor.authorZêzere, José
dc.contributor.authorReis, Eusébio
dc.contributor.authorGarcia, Ricardo A C
dc.contributor.authorOliveira, Sérgio
dc.contributor.authorRodrigues, Maria Luísa
dc.contributor.authorVieira, Goncalo
dc.contributor.authorFerreira, A. B.
dc.date.accessioned2019-02-15T11:34:37Z
dc.date.available2019-02-15T11:34:37Z
dc.date.issued2004
dc.description.abstractA general methodology for the probabilistic evaluation of landslide hazard is applied, taking in account both the landslide susceptibility and the instability triggering factors, mainly rainfall. The method is applied in the Fanhões-Trancão test site (north of Lisbon, Portugal) where 100 shallow translational slides were mapped and integrated into a GIS database. For the landslide susceptibility assessment it is assumed that future landslides can be predicted by statistical relationships between past landslides and the spatial data set of the predisposing factors (slope angle, slope aspect, transversal slope profile, lithology, superficial deposits, geomorphology, and land use). Susceptibility is evaluated using algorithms based on statistical/probabilistic analysis (Bayesian model) over unique-condition terrain units in a raster basis. The landslide susceptibility map is prepared by sorting all pixels according to the pixel susceptibility value in descending order. In order to validate the results of the susceptibility ana- lysis, the landslide data set is divided in two parts, using a temporal criterion. The first subset is used for obtaining a prediction image and the second subset is compared with the prediction results for validation. The obtained prediction-rate curve is used for the quantitative interpretation of the initial susceptibility map. Landslides in the study area are triggered by rainfall. The integration of triggering information in hazard assessment includes (i) the definition of thresholds of rainfall (quantity-duration) responsible for past landslide events; (ii) the calculation of the relevant return periods; (iii) the assumption that the same rainfall patterns (quantity/duration) which produced slope instability in the past will produce the same effects in the future (i.e. same types of landslides and same total affected area). The landslide hazard is present as the probability of each pixel to be affected by a slope movement, and results from the coupling between the susceptibility map, the prediction-rate curve, and the return periods of critical rainfall events, on a scenario basis. Using this methodology, different hazard scenarios were assessed, corresponding to different rain paths with different return periods.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationZêzere, J. L., Reis, E., Garcia, R., Oliveira, S., Rodrigues, M. L., Vieira, G., & Ferreira, A. B. (2004). Integration of spatial and temporal data for the definition of different landslide hazard scenarios in the area north of Lisbon (Portugal). Natural Hazards and Earth System Sciences, 4(1), 133–146. https://doi.org/10.5194/nhess-4-133-2004.pt_PT
dc.identifier.doi10.5194/nhess-4-133-2004pt_PT
dc.identifier.issn1561-8633
dc.identifier.issn1684-9981
dc.identifier.urihttp://hdl.handle.net/10451/37018
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherCopernicus Publicationspt_PT
dc.relation.publisherversionhttps://www.nat-hazards-earth-syst-sci.net/4/133/2004/nhess-4-133-2004.pdfpt_PT
dc.subjectSpatial datapt_PT
dc.subjectTemporal datapt_PT
dc.subjectLandslide hazard scenariospt_PT
dc.subjectNorth of Lisbonpt_PT
dc.subjectPortugalpt_PT
dc.titleIntegration of spatial and temporal data for the definition of different landslide hazard scenarios in the area north of Lisbon (Portugal)pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage146pt_PT
oaire.citation.issue1pt_PT
oaire.citation.startPage133pt_PT
oaire.citation.titleNatural Hazards and Earth System Sciencespt_PT
oaire.citation.volume4pt_PT
person.familyNameZêzere
person.familyNameReis
person.familyNameGarcia
person.familyNameOliveira
person.familyNameRodrigues
person.familyNameBrito Guapo Teles Vieira
person.givenNameJosé Luís
person.givenNameEusébio
person.givenNameR.A.C.
person.givenNameSérgio
person.givenNameMaria Luísa
person.givenNameGonçalo
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person.identifier.ciencia-id2519-6583-CAEA
person.identifier.orcid0000-0002-3953-673X
person.identifier.orcid0000-0001-8367-1835
person.identifier.orcid0000-0002-1036-6271
person.identifier.orcid0000-0003-0883-8564
person.identifier.orcid0000-0002-2466-2872
person.identifier.orcid0000-0001-7611-3464
person.identifier.ridM-8740-2016
person.identifier.ridJ-8719-2013
person.identifier.ridM-8412-2016
person.identifier.ridN-8324-2013
person.identifier.scopus-author-id6507109389
person.identifier.scopus-author-id7103146725
person.identifier.scopus-author-id55454646500
person.identifier.scopus-author-id24779631800
person.identifier.scopus-author-id7202521530
person.identifier.scopus-author-id7005863976
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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