GEOSCAN, résultats de la recherche


TitreQuantifying geohazard risk on a broad scale using a standardised methodology: the Eastern Canada Pilot Project
AuteurParent, M; Rivard, J R; Nastev, M; Benoit, N; Hunter, J; Crow, H; Wagner, C; Chow, W; Hasitngs, N; Pugin, A; Russell, R; Smirnoff, A; Wojarwoicz, M; Prieto, J
SourceCanadian Risk and Hazards Network, 9th Annual Symposium, symposium abstracts; 2012 p. 36
LiensOnline - En ligne
Séries alt.Secteur des sciences de la Terre, Contribution externe 20120152
ÉditeurCanadian Risk and Hazards Network
Réunion9th Annual Canadian Risk and Hazards Network Symposium; Vancouver; CA; Octobre 24-26, 2012
Mediaen ligne; numérique
ProvinceOntario; Québec
SNRC21M; 21L; 21E; 31I; 31H; 31G; 31B
Lat/Long OENS -76.0000 -70.0000 48.0000 44.0000
Sujetssecousses séismiques; risque de tremblement de terre; études séismiques; magnitudes des séismes; risque sismique; ondes transversales; ondes sismiques; géophysique
ProgrammeQuantitative risk assessment, Géoscience pour la sécurité publique
Résumé(disponible en anglais seulement)
To increase community resilience to earthquakes, sustainable planning and mitigation decisions require well-informed geohazard risk assessments. To this aim, the Eastern Canada Pilot Project (ECPP) of the Geological Survey of Canada (GSC) is developing quantitative model of earthquake damage loss estimates. The study utilises the standardised methodology of FEMA's Hazus-MH loss estimation software, with special attention to knowledge of site conditions, a prerequisite in the analysis and prediction of ground shaking potential during strong earthquakes. Firstly, a compilation map of Quaternary surficial geology is produced for the central St. Lawrence Lowlands between Ottawa and Quebec City. Geostatistical methods bring together this initial surficial compilation with existing 3D stratigraphic models, provincial water well logs, geotechnical boreholes, geophysical surveys, oil and gas well logs, and the 3 arc-second SRTM - NASA digital elevation model, to represent bedrock topography and thickness for three major surficial units: (i) stiff glacial and glaciofluvial sediments and earlier Pleistocene sediments, (ii) soft postglacial marine muds, (iii) and offlap marine, lacustrine and alluvial sands. Preliminary site conditions are then determined using recent shear-wave velocity measurements linked to surficial deposit types and depths. A range of probabilistic and deterministic earthquake scenarios, some with both short and long period seismic amplification factors derived from the National Building Code of Canada, are combined with inventory data of structures, infrastructures and population for the 1 957 census subdivisions and tracts within the study area. Forthcoming ECPP results should quantify geographic variations in loss estimates and promote further detailed local seismic risk assessments.