In order to objectively determine the weight of debris flow impact factors and accurately and reasonably evaluate the risk of debris flow,a dynamic grey correlation model for debris flow risk was constructed.Aiming at the limitation of factor weight determi-nation in traditional grey correlation analysis method,combined with triangular fuzzy theory,a dynamic resolution coefficient was pro-posed.According to the actual situation of different debris flow gullies,the identification coefficient of each factor was dynamically ad-justed and the corresponding weight was determined,and then a dynamic grey correlation model for debris flow risk was established.The model was used to evaluate the risk of seven typical debris flow gullies in the western Niushou Mountain and compared with the re-sults of other evaluation methods.The results show that the dynamic grey correlation model of debris flow risk can expand the discrimi-nation of debris flow risk assessment results and improve the resolution because of the dynamic resolution considering the actual situa-tion and factor characteristics of each gully and calculating the factor weight accordingly.The evaluation results are more consistent with the actual situation.
关键词
泥石流/灰色关联模型/模糊理论/动态分辨系数/危险性评价
Key words
debris flow/grey theory model/fuzzy theory/dynamic identification coefficient/risk assessment
维普
万方数据