Qianfoshan scenic spot,located in northwest of Anxian County,Sichuan Province,was heavily hit by the Wenchuan Earthquake.Taking the scenic spot as study area,researches on characteristics and discrimination of debris flows following the Earthquake were conducted.Based on remote sensing interpretation and field survey,it was found out that 10 landslides and dozens of rock avalanches and 4 barrier dams were induced by the earthquake,which could provide abundant loose materials for the subsequent debris flows and totaled up to 17 million m3 in the study area.There were 14 branches in this area and most of them were still in its infancy,which favored the formation of flow concentration and surface runoff.Additionally,rainfall is abundant in the area,and therefore 5 debris flows had been occurred during the rainy season of 2008.To study the properties of the other 9 branches,on the basis of cause analysis of debris flows in this area,the watershed integrity coefficient,relative cutting degree,mean channel gradient,mean mountain slope,stratum lithology and the distance of geometrical center to the fault were selected as discrimination parameters.Using these parameters,the 9 branches were discriminated by the Fisher Discrimination Model.Results showed that most branches were potential debris flow gullies.In August 2009,all branches burst out large-size debris flows in the study area,which verified effectiveness and feasibility of the model.However,this model had still room for much improvement.