High Resolution Remote Sensing Monitoring and Assessment of Secondary Geological Disasters Triggered by the Lushan Earthquake
WANG Fu-tao1，3, WANG Shi-xin1, ZHOU Yi1*, WANG Li-tao1, YAN Fu-li1, LI Wen-jun1，2, LIU Xiong-fei1，2
1. Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China 2. University of Chinese Academy of Sciences, Beijing 100049, China 3. Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, Guilin 541004, China
Abstract：The secondary geological disasters triggered by the Lushan earthquake on April 20, 2013, such as landslides, collapses, debris flows, etc., had caused great casualties and losses. We monitored the number and spatial distribution of the secondary geological disasters in the earthquake-hit area from airborne remote sensing images, which covered areas about 3 100 km2. The results showed that Lushan County, Baoxing County and Tianquan County were most severely affected; there were 164, 126 and 71 secondary geological disasters in these regions. Moreover, we analyzed the relationship between the distribution of the secondary geological disasters, geological structure and intensity. The results indicate that there were 4 high-hazard zones in the monitored area, one focused within six kilometers from the epicenter, and others are distributed along the two main fault zones of the Longmen Mountain. More than 97% secondary geological disasters occurred in zones with a seismic intensity of VII to IX degrees, a slope between 25 A degrees and 50 A degrees, and an altitude of between 800 and 2 000 m. At last, preliminary suggestions were proposed for the rehabilitation and reconstruction planning of Lushan earthquake. According to the analysis result, airborne and space borne remote sensing can be used accurately and effectively in almost real-time to monitor and assess secondary geological disasters, providing a scientific basis and decision making support for government emergency command and post-disaster reconstruction.
王福涛1，3，王世新1，周 艺1*，王丽涛1，阎福礼1，李文俊1，2，刘雄飞1，2 . 高分辨率多光谱的芦山地震次生地质灾害遥感监测与评估 [J]. 光谱学与光谱分析, 2016, 36(01): 181-185.
WANG Fu-tao1，3, WANG Shi-xin1, ZHOU Yi1*, WANG Li-tao1, YAN Fu-li1, LI Wen-jun1，2, LIU Xiong-fei1，2 . High Resolution Remote Sensing Monitoring and Assessment of Secondary Geological Disasters Triggered by the Lushan Earthquake . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(01): 181-185.
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