Research On Ecological Environment Security Assessment Based On PSR Model

With the development of industrialization,the global environment has been seriously polluted,the ability to recover the ecological environment has been reduced,and natural disasters have occurred frequently.Therefore,it is urgent to maintain the ecological environment security.Vegetation change has an important impact on global energy cycle,biological cycle and sustainable development,among which slope vegetation plays a more important role in slope protection.Slope vegetation growth is affected by the long-term interaction of natural environment,climate change and human activities,and its change reflects the overall condition of ecological environment to a certain extent.Therefore,it is of great significance to explore the influencing factors of local ecological environment security by studying the growth status of slope vegetation in different regions.The main work of this paper is as follows:Firstly,relevant data of Yan ’an,Xi ’an and Ankang in Shaanxi Province were collected.Field investigation method was used to investigate and classify the growth of slope vegetation in three regions.According to the growth law of slope vegetation,the influencing factors of ecological environment security in three regions were studied.Secondly,the evaluation model of regional ecological environment security is constructed.According to the principle of PSR model,the evaluation index system of ecological environment security was constructed by screening related evaluation indexes and the evaluation model of ecological environment security based on PSR was established.The index data of three regions in Shaanxi Province in 2021 were substituted to evaluate the ecological environment security.Finally,RSEI evaluation was carried out for the three regions.According to the results of RSEI evaluation,the accuracy and feasibility of the ecological environment security evaluation model were verified,and the current situation of the ecological environment security in three regions of Shaanxi Province was analyzed and countermeasures were put forward.A Bayesian network model was established to verify the effectiveness of the proposed strategy.Based on the theory of slope vegetation influencing factors analysis and comprehensive safety evaluation,the ecological environment security research method proposed in this paper provides a new idea for regional ecological environment security research.The evaluation model of regional ecological environment security based on PSR provides methods and approaches for the assessment of ecological environment status.The research of this paper is expected to provide some reference for how to maintain the growth of regional slope vegetation and ensure the ecological environment security.