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TitreA profile of earthquake risk for the District of North Vancouver, British Columbia
TéléchargerTéléchargements
AuteurJourneay, J M; Dercole, F; Mason, D; Westin, M; Prieto, J A; Wagner, C L; Hastings, N L; Chang, S E; Lotze, A; Ventura, C E
SourceCommission géologique du Canada, Dossier public 7677, 2015, 224 pages, https://doi.org/10.4095/296256
Année2015
ÉditeurRessources naturelles Canada
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/296256
Mediaen ligne; numérique
Référence reliéeCette publication contient les publications suivantes
Formatspdf
ProvinceColombie-Britannique
SNRC92G/06; 92G/07
Lat/Long OENS-123.1333 -122.8667 49.4167 49.3000
Sujetssecousses séismiques; risque de tremblement de terre; études séismiques; sismicité; risque sismique; vitesse des ondes sismiques; catalogues des tremblements de terre; zones sismiques; vitesse des ondes sismiques; magnitudes des séismes; séismologie des secousses fortes; dangers pour la santé; codes du bâtiment; potentiel d'inondation; plaines d'inondation; géophysique
Illustrationslocation maps; tables; cartoons; graphs; photographs; flow charts; block diagrams; histograms; pie charts
Consultation
Endroit
 
Bibliothèque de Ressources naturelles Canada - Ottawa (Sciences de la Terre)
 
ProgrammeEvaluation quantitiative du risque, Géoscience pour la sécurité publique
Diffusé2015 05 01
Résumé(disponible en anglais seulement)
The societal costs of natural hazards are large and steadily increasing in Canada due to increased urban development, an aging infrastructure, and limited capacities to anticipate and plan for unexpected disasters. Lessons learned from recent disasters underscore the need for a comprehensive risk-based approach to land use planning and emergency management at all levels of government-one that utilizes available knowledge about the risk environment to inform actions that have a potential to minimize future disaster losses and increase the resilience of communities to the dynamic and uncertain forces of change.
We cannot predict or prevent earthquakes from happening. However, we do have the knowledge and capabilities to change the outcome of earthquake disasters through a combination of risk assessment and disaster resilience planning. Risk assessment is the process through which knowledge about a community and its exposure to natural hazards is used to anticipate the likely impacts and consequences of an unexpected event at some point in the future. Disaster resilience planning is focused on actions that can be taken in advance to balance policy trade offs for growth and development (opportunities) with risk reduction investments that have a potential to minimize future losses (liabilities) while increasing capabilities of a community to withstand, respond to and recover from unexpected disaster events (resilience).
This study provides a detailed assessment of earthquake risk for the District of North Vancouver - an urban municipality of approximately 83,000 people situated along the North Shore Mountains in southwestern British Columbia. It describes the probable impacts of a significant earthquake with greater clarity and detail than ever before, and develops both a methodology and target criteria to guide future risk reduction and disaster resilience planning activities through the lens of building performance, public safety, lifeline resilience and socioeconomic security. We examine cause-effect relationships and seismic risks for a plausible earthquake scenario in the Strait of Georgia (M7.3), and undertake a more general assessment of who and what are vulnerable to known earthquake hazards in the region using probabilistic ground motion models that are consistent with those used to establish seismic safety guidelines in the National Building Code of Canada (NBCC, 2010).
Study outputs offer a capacity to explore thresholds of risk tolerance and opportunities for mitigation through ongoing emergency planning and land use decision-making activities in the community. Methodologies and insights gained through this study are transferrable to other communities who may face similar challenges of managing growth and development in areas exposed to earthquake hazards. Key findings and recommendations of the study contribute to broader efforts led by the Canadian Safety and Security Program to support disaster resilience planning at a community level in Canada.
Résumé(Résumé en langage clair et simple, non publié)
Les catastrophes dues aux risques naturels coûtent de plus en plus cher au Canada en raison de l'aménagement de zones à risque, du vieillissement de l'infrastructure, du changement climatique et de notre capacité à prévoir les catastrophes et à nous y préparer. Les événements récents soulignent l'importance d'adopter une démarche d'aménagement du territoire et de gestion des urgences axée sur le risque. La présente étude évalue le risque de séisme dans le district de North Vancouver, municipalité urbaine du sud-ouest de la Colombie-Britannique. Elle décrit l'incidence probable d'un tremblement de terre important et établit une méthodologie afin d'orienter la planification de la capacité d'adaptation aux catastrophes en renforçant la capacité en ce qui a trait aux seuils de tolérance au risque et aux stratégies d'atténuation, et afin d'aider à planifier l'intervention et le rétablissement en cas de catastrophe. L'information et les méthodes tirées de cette étude seront transférables à d'autres collectivités exposées à des risques de séisme. Ces travaux contribuent au cadre d'évaluation tous risques de Recherche et développement pour la défense Canada visant à appuyer la planification de la capacité d'adaptation aux catastrophes à l'échelle nationale.
GEOSCAN ID296256