Study on risk assessment of debris flow geological disaster
In order to clarify the geological high-risk area of debris flow and carry out effective prevention and control,this paper uses the grey relational analysis method to determine the weight of each factor and establish the evaluation model through the quantitative analysis of the influencing factors such as terrain slope,rainfall,loose material reserves,geological structure and human activities.The risk of debris flow geological disasters in Dechang county is evaluated.The results show that the risk score of debris flow is 0.805 6,which belongs to the high-risk area.Especially in the rainstorm season,the frequency of debris flow is high,which threatens the safety of farmland,village and infrastructure.Based on the evaluation results,the prevention and control measures such as the construction of drainage channel,sand dam and landslide monitoring system are put forward to reduce the harm of debris flow and provide scientific basis for disaster prevention and mitigation of debris flow.
万方数据
维普
