PROCEEDINGS ARTICLE | October 10, 2009
Proc. SPIE. 7471, Second International Conference on Earth Observation for Global Changes
KEYWORDS: Roads, Soil science, Satellites, Remote sensing, Satellite imaging, Earthquakes, Geographic information systems, Landslides, Earth observing sensors, High resolution satellite images
A mega-earthquake of magnitude 8 of Richter scale occurred in Wenchuan County, Sichuan Province, China on May 12,
2008. The earthquake inflicted heavy loss of human lives and properties. The Wenchuan earthquake induced geological
disasters, house collapse, and road blockage. In this paper, we demonstrate an application of optical remote sensing
images acquired from airborne and satellite platforms in assessing the earthquake damages. The high-resolution airborne
images were acquired by the Chinese Academy of Sciences (CAS). The pre- and post-earthquake satellite images of
QuickBird, IKONOS, Landsat TM, ALOS, and SPOT were collected by the Center for Earth Observation & Digital
Earth (CEODE), CAS, and some of the satellite data were provided by the United States, Japan, and the European Space
Agency. The pre- and post-earthquake remote sensing images integrated with DEM and GIS data were adopted to
monitor and analyze various earthquake disasters, such as road blockage, house collapse, landslides, avalanches, rock
debris flows, and barrier lakes. The results showed that airborne optical images provide a convenient tool for quick and
timely monitoring and assessing of the distribution and dynamic changes of the disasters over the earthquake-struck
regions. In addition, our study showed that the optical remote sensing data integrated with GIS data can be used to assess
disaster conditions such as damaged farmlands, soil erosion, etc, which in turn provides useful information for the postdisaster
reconstruction.
