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Empirical-statistical models based on remote sensing for estimating the volume of landslides induced by the Wenchuan earthquake

  • Jianrong Fan
  • Xiuzhen LiEmail author
  • Fenfen Guo
  • Xiang Guo
Article

Abstract

The Wenchuan Ms 8.0 earthquake on May 12, 2008 induced a huge number of landslides. The distribution and volume of the landslides are very important for assessing risks and understanding the landslide — debris flow — barrier lake — bursts flood disaster chain. The number and the area of landslides in a wide region can be easily obtained by remote sensing technique, while the volume is relatively difficult to obtain because it requires some detailed geometric information of slope failure surface and sub-surface. Different empirical models for estimating landslide volume were discussed based on the data of 107 landslides in the earthquake-stricken area. The volume data of these landslides were collected by field survey. Their areas were obtained by interpreting remote sensing images while their apparent friction coefficients and height were extracted from the images unifying DEM (digital elevation model). By analyzing the relationships between the volume and the area, apparent friction coefficients, and the height, two models were established, one for the adaptation of a magnitude scale landslide events in a wide range of region, another for the adaptation in a small scope. The correlation coefficients (R2) are 0.7977 and 0.8913, respectively. The results estimated by the two models agree well with the measurement data.

Keywords

5.12 Wenchuan earthquake Landslides Remote sensing Volume Estimation model 

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Copyright information

© Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Jianrong Fan
    • 1
  • Xiuzhen Li
    • 1
    Email author
  • Fenfen Guo
    • 1
  • Xiang Guo
    • 1
  1. 1.Key Laboratory of Mountain Hazards and Earth Surface ProcessesChinese Academy of SciencesChengduChina

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