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Table 4 Topographic analysis of the co-seismic landslides produced by the 2008 Wenchuan earthquake

From: Co-seismic landslide topographic analysis based on multi-temporal DEM—A case study of the Wenchuan earthquake

  LD IAD EALD
Site I    
 Slope aspect 51.73% 45.46% 23.52%
 Roughness 56.72% 54.10% 30.68%
 Slope 67.33% 41.85% 28.18%
 Intersection 30.55% 100% 30.55%
Site II    
 Slope aspect 50.34% 69.31% 34.89%
 Roughness 75.96% 53.89% 40.94%
 Slope 82.85% 47.46% 39.32%
 Intersection 38.34% 100% 38.34%
Site III    
 Slope aspect 66.50% 20.77% 13.81%
 Roughness 46.90% 56.57% 33.04%
 Slope 58.42% 36.79% 17.25%
 Intersection 34.14% 100% 34.14%
  1. LD: Landslide density: landslides occurred within the derived regions based on topographic analysis of roughness, hill slope and slope aspect by applying corresponding thresholds (detail thresholds refer to the text); IAD: intersection area density, represents the area percentage of the intersection area within the derived regions; EALD: Equal area landslide density, by multiple the landslide percentage with the intersection area percentage which is used to describe the efficiency of each method in landslide occurrence detection.