Share Email Print
cover

Proceedings Paper

Spatial variations of the house collapse and afflicted population by aerial images in the Wenchuan earthquake
Author(s): Liping Lei; Liangyun Liu; Li Zhang; Jiantao Bi; Yanhong Wu; Quanjun Jiao; Wenjuan Zhang
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The spatial variation of collapsing houses caused by the earthquake may be used to assess the earthquake damage intensity, and support the emergency decision-making process in rescue and recovery operations. We monitored the spatial variation of house collapse ratio in the 5.12 Wenchuan Earthquake by the aerial images, and analyzed the relationship with the earthquake intensity and assessed the afflicted population from the population and house collapse ratio. The house collapse ratio was derived based on the results of visual interpretation of the collapsed houses and noncollapsed houses by ADS40 airborne images acquired from May 15 to May 28, 2008. The results show that the houses were widely damaged in earthquake-damaged region; especially the counties of Wenchuan, Beichuan, Qinchuan, Mianzhu, Shifang and Pengzhou experienced the severest damage. The house collapse ratios, which are above 50%, mainly distributed along the surface rupture in a SW to NE direction from Yinxiu to Beichuan. When analyzing the spatial variation of the house collapse ratio and its relationship with the earthquake intensity, it was found the house collapse ratio and the earthquake intensity presented positive correlation. An index called the afflicted population which was derived by the house collapse ratio multiplying the population density showed a correlation with the actual fatalities population, which will be available to provide the reference information for the decision-making of rescue areas where the life of peoples may be urgently needed to rescue.

Paper Details

Date Published: 3 November 2010
PDF: 7 pages
Proc. SPIE 7841, Sixth International Symposium on Digital Earth: Data Processing and Applications, 78411H (3 November 2010); doi: 10.1117/12.873270
Show Author Affiliations
Liping Lei, Ctr. for Earth Observation and Digital Earth (China)
Liangyun Liu, Ctr. for Earth Observation and Digital Earth (China)
Li Zhang, Ctr. for Earth Observation and Digital Earth (China)
Jiantao Bi, Ctr. for Earth Observation and Digital Earth (China)
Yanhong Wu, Ctr. for Earth Observation and Digital Earth (China)
Quanjun Jiao, Ctr. for Earth Observation and Digital Earth (China)
Wenjuan Zhang, Ctr. for Earth Observation and Digital Earth (China)


Published in SPIE Proceedings Vol. 7841:
Sixth International Symposium on Digital Earth: Data Processing and Applications
Huadong Guo; Changlin Wang, Editor(s)

© SPIE. Terms of Use
Back to Top