Journal
REMOTE SENSING
Volume 9, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/rs9040330
Keywords
Amatrice earthquake; synthetic aperture radar; dual-polarization; building damage; multitemporal analysis
Categories
Funding
- Japan Society for the Promotion of Science (JSPS) [16F16380, 15H05134]
- Grants-in-Aid for Scientific Research [16F16380, 15H05134] Funding Source: KAKEN
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On 24 August 2016, the M 6.2 Amatrice earthquake struck central Italy, well-known as a seismically active region, causing considerable damage to buildings in the town of Amatrice and the surrounding area. Damage from this earthquake was assessed quantitatively by means of multitemporal synthetic aperture radar (SAR) coherence and SAR intensity methods using dual-polarized SAR data obtained from the Sentinel-1 (VV, VH) and ALOS-2 (HH, HV) satellites. We developed linear discriminant functions based on three items: (1) the differential coherence values; (2) the differential backscattering intensity values of pre- and post-event images; and (3) a binary damage map of the optical pre- and post-event imagery. The accuracy of the proposed model was 84% for the Sentinel-1 data and 76% for the ALOS-2 data. The damage proxy maps deduced from the linear discriminant functions can be useful in the parcel-by-parcel assessment of building damage and development of spatial models for the allocation of urban search and rescue operations.
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