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| Titel |
Integrating population dynamics into mapping human exposure to seismic hazard |
| VerfasserIn |
S. Freire, C. Aubrecht |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 12, no. 11 ; Nr. 12, no. 11 (2012-11-29), S.3533-3543 |
| Datensatznummer |
250011208
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| Publikation (Nr.) |
 copernicus.org/nhess-12-3533-2012.pdf |
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| Zusammenfassung |
| Disaster risk is not fully characterized without taking into account
vulnerability and population exposure. Assessment of earthquake risk in
urban areas would benefit from considering the variation of population
distribution at more detailed spatial and temporal scales, and from a more
explicit integration of this improved demographic data with existing seismic
hazard maps. In the present work, "intelligent" dasymetric mapping is used
to model population dynamics at high spatial resolution in order to benefit
the analysis of spatio-temporal exposure to earthquake hazard in a
metropolitan area. These night- and daytime-specific population densities
are then classified and combined with seismic intensity levels to derive new
spatially-explicit four-class-composite maps of human exposure. The
presented approach enables a more thorough assessment of population exposure
to earthquake hazard. Results show that there are significantly more people
potentially at risk in the daytime period, demonstrating the shifting nature
of population exposure in the daily cycle and the need to move beyond
conventional residence-based demographic data sources to improve risk analyses. The proposed fine-scale maps of human exposure to seismic
intensity are mainly aimed at benefiting visualization and communication of
earthquake risk, but can be valuable in all phases of the disaster
management process where knowledge of population densities is relevant for
decision-making. |
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