Risk Assessment Of Hua-yen Temple Landslide

Hua-yen Temple is located on the loess plateau slope.In recent years,slope instability is in serious condition under the combined effects of extreme climate and human engineering activities.The hidden danger of the landslide has caused a serious threat to the safety of national protective historical relics and the temple,arousing great concern of society and the news media.To evaluate the risk of a single-landslide,different from regional landslide,theory and method of risk evaluation for a single-landslide need to be investigated and applied.Meanwhile,the single-landslide of Hua-yen Temple is lacked of stability at present,therefore,it is of importance and necessity to evaluate the risk of the landslide.Based on the comprehensive analysis of the theory and method of landslide hazard risk evaluation at home and abroad,this paper systematically evaluates Hua-yen Temple landslide,which mainly includes analysis of the risk of single-landslide hazard,analysis of the vulnerability of hazard bearing body,and the disaster risk estimation.First,the basic characteristics of the landslide were analyzed on the basis of field investigation and data collection,then the risk of the landslide of Hua-yen Temple was analyzed.The results showed that the stability coefficients of Hua-yen Temple landslide are1.01,0.90,0.97 and 0.824 respectively under natural,heavy rain,earthquake and heavy rain +earthquake conditions.Hua-yen Temple landslide is in unstable state under the influence of the induced factors.At the same time,the probability of the landslide is calculated by conditional analysis method,and the probability of occurrence of Hua-yen Temple landslide under the induced factors is 0.551,0.054 and 0.059 respectively.The potential hazard scope of Hua-yen Temple landslide was speculated by using 2D-BLOCK to simulate Hua-yen Temple landslide movement process.Then with vulnerability of hazard bearing body in the potential hazard scope analyzed,the hazard-affected probability and the value loss rate calculated,and the value loss of the hazard bearing body calculated,finally,through the estimation formula of risk value of single-landslide,the property value at risk are 635.46 thousand yuan,2.85115 million yuan,389.86 thousand yuan,and 364.41 thousand yuan.In this paper,Hua-yen Temple landslide is taken for example to analyze and evaluate the risk of a single-landslide.The technique and method adopted and the idea have some value and use for reference to other single-landslide.And the evaluation results and the suggestions can also be used for reference to the scenic area planning.