After the "4·20" earthquake in Lushan County, secondary geological disasters such as landslides, collapses and debris flows occurred frequently. There are 365 new geological hazard spots which seriously impact local economic construction and post-disaster reconstruction. This paper selects lithology, fault zone, slope, relative elevation, annual rainfall, peak ground acceleration, and the type of land use based on geological disasters environmental conditions to build up a geological disasters hazard evaluation methodology of entropy, which has been applied to Lushan's geological disasters risk assessment. The results show that 49.89% of Lushan's area belong to a medium and high dangerous region, among which 29.99% are in high dangerous region situated in Zheng River, Yuxi River and Lingguan River drainage basin. Impacted by terrain, human activities and earthquake, the geological disasters always damage heavily, so we should pay more attention to it during subsequent construction and disaster prevention and mitigation.

geological disaster  /  hazard  /  disaster entropy  /  GIS  /  Lushan