Ecological Evaluation Of Green Highway Based On PSR Model

Highway construction will inevitably affect and destroy the surrounding ecology.As a national key promotion of green highway project,it is necessary to carry out ecological protection and reconstruction of the ecological environment.This is not only the green method and green technology to be considered in the initial stage of highway construction,but also the ecological environment protection measures to be considered in the long run.It is also an important indicator to evaluate the ecological impact of green highway construction in China.In this paper,through two years of investigation and Study on green highway and green ecology,we choose the pressure state response model(PSR model)in the evaluation system construction method.In the ecological environment impact assessment,PSR model can not only consider the green highway ecological construction ability of highway construction party,but also from the perspective of human social behavior and ecological environment It is more comprehensive and reliable to analyze the ecological construction degree of the whole green highway from the perspective of feedback,and to analyze the ecological impact from multiple perspectives.This paper studies the construction of ecological evaluation index and system of green highway based on PSR model,and uses fuzzy analytic hierarchy process,entropy weight method and fuzzy comprehensive evaluation method to evaluate the ecology of green highway.First of all,from the perspective of green highway ecology,the pressure layer,state layer and response layer of the evaluation system are determined by consulting relevant experts.The fuzzy analytic hierarchy process and entropy weight method are combined to determine the comprehensive weight of the evaluation index.According to the obtained evaluation index system and index weight,the ecological evaluation model of green highway is constructed by fuzzy comprehensive evaluation method.Finally,through the case analysis,the ecological evaluation of the reconstruction and expansion of dan’a highway from Hunchun to Dongning is carried out,and the evaluation score is "84.83".The comprehensive evaluation grade is "good".The results show that with the help of Bim and GIS under big data,the evaluation institutions can more accurately understand the state of green highway construction period,make the ecological evaluation system and evaluation score of green highway more reliable,and effectively avoid the error caused by a single method through the combination of subjective and objective weight method.The establishment of ecological evaluation system of green highway based on PSR model is of great significance for the construction of green highway life cycle assessment.