(1. Institute of Geology and Geophysics，Chinese Academy of Sciences，Beijing 100029，China；2. Key Laboratory of Neotectonic and Geohazard，Ministry of Land and Resources，Beijing 100081，China；3. Institute of Geomechanics，Chinese Academy of Geological Sciences，Beijing 100081，China；4. China University of Geosciences，Beijing 100083，China；5. China University of Mining and Technology，Beijing 100083，China)
Abstract：On 12 May 2008，a catastrophic earthquake with surface wave magnitude of 8.0 struck the Sichuan Province of China. Tens of thousand of landslides were triggered by this earthquake over a broad area. 48 007 landslides were interpreted from aerial photographs and multi-source remote sensing imageries，verified by field check. A spatial database，including landslides and associated controlling parameters which may have influence on the occurrence of landslides，was developed and analyzed using geographical information system(GIS) technology. The correlations of landslide distribution with controlling parameters，including faults，lithology，elevation，slope angle，slope aspect，drainages and roads are firstly analyzed，and landslide area-ratio was calculated for each group of the above parameters. An analytical hierarchy process(AHP) was then applied to determine the significance of controlling parameters in triggering the landslides. The resulting susceptibility map showed five classes of landslide susceptibility，i.e. extremely high，high，moderate，low，and extremely low. The area with extremely high and high susceptibility accounts for about 8 211 km2，16.9% of the study area. This indicates that the result is reasonable in 60.5% of the landslides occurred in high or extremely high susceptibility region.
