Extracting damages caused by the 2008 Ms 8.0 Wenchuan earthquake from SAR remote sensing data

doi:10.1016/j.jseaes.2010.07.009

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 会议论文

	Extracting damages caused by the 2008 Ms 8.0 Wenchuan earthquake from SAR remote sensing data
	Dong, Yanfang 1; Li, Qi2 ; Dou, Aixia 1; Wang, Xiaoqing 1
	2011
会议日期	SEP 03-05, 2008
会议地点	Dali, PEOPLES R CHINA
关键词	High spatial resolution SAR Earthquake damage extraction Change detection Wenchuan earthquake
卷号	40
期号	4
DOI	10.1016/j.jseaes.2010.07.009
页码	907-914
英文摘要	Bad weather conditions usually limit the acquisition of optical remote sensing images, while all day and all weather synthetic aperture radar (SAR) shows the ability of providing timely remote sensing data for emergency response and rescue works after earthquake. Because SAR is sensitive to the surface changes caused by earthquake, the modified electromagnetic behaviour by geological disasters and the collapse of buildings can be recorded in SAR images as backscattering intensity changes. Absolute radiometric calibration was performed to SAR products to derive backscattering coefficient sigma nought from image digital number (DN). Based on change detection methods, Advanced Land Observing Satellite (ALOS) Phased Array type L-band Synthetic Aperture Radar (PALSAR) data and TerraSAR-X data acquired for the Ms 8.0 Wenchuan earthquake were used to extract earthquake damage information. This study revealed that landslides showed stronger backscattering and barrier lakes showed lower backscattering in post-earthquake 10 m ALOS PALSAR images comparing to pre-earthquake, and collapsed buildings showed lower backscattering compared to un-collapsed buildings in 1 m TerraSAR-X image. Results showed that SAR data with different spatial resolutions are useful for different earthquake damage information extraction: medium spatial resolution SAR data, e.g. 10 m ALOS PALSAR data, were efficient for secondary geological disaster extraction; high-resolution SAR data, e.g. 1 m TerraSAR-X data, with the help of ancillary GIS data or high-resolution optical data, could be used to extract building collapse information in urban areas. This study indicates that SAR remote sensing data can provide earthquake damage information at early emergency stage and assist the field surveying, further damage assessment and post-earthquake reconstruction. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.
会议录	JOURNAL OF ASIAN EARTH SCIENCES
会议录出版者	PERGAMON-ELSEVIER SCIENCE LTD
会议录出版地	OXFORD
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000287950800010
内容类型	会议论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4640]
专题	岩土力学所知识全产出_会议论文国家重点实验室知识产出_会议论文
作者单位	1.China Earthquake Adm, Inst Earthquake Sci ; 2.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech
推荐引用方式 GB/T 7714	Dong, Yanfang,Li, Qi,Dou, Aixia,et al. Extracting damages caused by the 2008 Ms 8.0 Wenchuan earthquake from SAR remote sensing data[C]. 见:. Dali, PEOPLES R CHINA. SEP 03-05, 2008.