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A Geospatial Liquefaction Model for Rapid Response and Loss Estimation
- Source :
- Earthquake Spectra. 31:1813-1837
- Publication Year :
- 2015
- Publisher :
- SAGE Publications, 2015.
-
Abstract
- We describe an approach to model liquefaction extent that focuses on identifying broadly available geospatial variables (e.g., derived from digital elevation models) and earthquake-specific parameters (e.g., peak ground acceleration, PGA). A key step is database development: We focus on the 1995 Kobe and 2010–2011 Christchurch earthquakes because the presence/absence of liquefaction has been mapped so that the database is unbiased with respect to the areal extent of liquefaction. We derive two liquefaction models with explanatory variables that include PGA, shear-wave velocity, compound topographic index, and a newly defined normalized distance parameter (distance to coast divided by the sum of distance to coast and distance to the basin inland edge). To check the portability/reliability of these models, we apply them to the 2010 Haiti earthquake. We conclude that these models provide first-order approximations of the extent of liquefaction, appropriate for use in rapid response, loss estimation, and simulations.
- Subjects :
- Estimation
Geospatial analysis
010504 meteorology & atmospheric sciences
Liquefaction
010502 geochemistry & geophysics
Geotechnical Engineering and Engineering Geology
computer.software_genre
01 natural sciences
Civil engineering
Geophysics
Geotechnical engineering
Digital elevation model
computer
Geology
Rapid response
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 19448201 and 87552930
- Volume :
- 31
- Database :
- OpenAIRE
- Journal :
- Earthquake Spectra
- Accession number :
- edsair.doi...........a891317d49530389f817aca8bcd82040