Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/8258
DC FieldValueLanguage
dc.contributor.authorallFavalli, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italiaen
dc.contributor.authorallTarquini, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italiaen
dc.contributor.authorallFornaciai, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italiaen
dc.contributor.authorallBoschi, E.en
dc.date.accessioned2012-10-18T07:17:11Zen
dc.date.available2012-10-18T07:17:11Zen
dc.date.issued2012-06-01en
dc.identifier.urihttp://hdl.handle.net/2122/8258en
dc.description.abstractThe dispersion index (dσ) of topography is introduced. This index is a geomorphic parameter which characterizes each point of topography with respect to the stability/instability of the steepest descent path (SDP) originating from it. The procedure for calculating dσ is based on the assessment of SDP variations as the initial topography is also varied within a given elevation Δh, while a length scale L defines the maximum extent of the SDP. As a result, dσ can be derived for different ranges Δh and different bandwidths L. Since at each point the gravitational force would direct a surface flow along the SDP, dσ appears to have a strong influence on the behavior of gravity-driven mass flows, influencing local topographic widening, spreading or channelization. Considering Mount Etna (Italy) as a test case, we present maps of dσ for Δh = 3 m and L = 1, 2, 4 and 8 km, demonstrating also the relationship between the range Δh = 3 m and Etnean lava flows. Focusing on the 2001 lava flow, we show that the presented maps of dσ, besides being a tool for viewing morphologies, have interesting applications for hazard assessment related to lava flows.en
dc.language.isoEnglishen
dc.publisher.nameElsevier Science Limiteden
dc.relation.ispartofGeomorphologyen
dc.relation.ispartofseries/153-154(2012)en
dc.subjectDispersion indexen
dc.subjectDEMen
dc.subjectLava flowen
dc.subjectGeomorphic parameteren
dc.subjectMount Etnaen
dc.titleDispersion index of topographic surfacesen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumber169-178en
dc.subject.INGV04. Solid Earth::04.04. Geology::04.04.03. Geomorphologyen
dc.identifier.doi10.1016/j.geomorph.2012.02.022en
dc.description.obiettivoSpecifico5.5. TTC - Sistema Informativo Territorialeen
dc.description.journalTypeJCR Journalen
dc.description.fulltextrestricteden
dc.relation.issn0169-555Xen
dc.relation.eissn1872-695Xen
dc.contributor.authorFavalli, M.en
dc.contributor.authorTarquini, S.en
dc.contributor.authorFornaciai, A.en
dc.contributor.authorBoschi, E.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Pisa, Pisa, Italiaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia-
crisitem.author.orcid0000-0002-7338-6069-
crisitem.author.orcid0000-0002-8064-621X-
crisitem.author.orcid0000-0003-4829-4928-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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