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J4 ›› 2011, Vol. 17 ›› Issue (1): 1-12.

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Study of Earth Observation for Disaster Reduction  in Wenchuan and Yushu Earthquakes

GUO Hua-dong, LIU Liang-yun, FAN Xiang-tao,  LI Xin-wu   

  1. Study of Earth Observation for Disaster Reduction in Wenchuan and Yushu Earthquakes
  • Received:2011-01-30 Revised:2011-03-05 Online:2011-03-20 Published:2011-03-20
  • Contact: Guo Huadong, Senior Research Fellow
  • About author:Guo Huadong, Senior Research Fellow

Abstract:

Wenchuan and Yushu earthquakes caused heavy casualties and property losses. Right after the events, earth observation techniques were applied to disaster monitoring and assessment. This paper introduces three typical results of these two earthquakes. done by the Center for Earth Observation and Digital Earth (CEODE), Chinese Academy of Sciences (CAS). Firstly, optical earth observation techniques were used in deriving locations, spatial distribution and intensities of three important secondary geological disasters including barrier lakes, damaged transportation and collapses/landslides/debris flows. Secondly, Multi-mode Synthetic Aperture Radar (SAR) techniques were used to analyze the regional geological structures and lithologic distribution characteristics, and then obtain sizes and spatial distribution of coseismic deformation fields in heavily hit areas during the Yushu earthquake. Finally, 3D software system for disaster simulation and assessment was developed which provided accurate and effective ways for decision-making of emergency rescues and disaster relief.

Key words: earth observation, secondary geological disasters, Yushu earthquake, Wenchuan earthquake, Multi-mode SAR

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