Research On Regional Ecological Security Evaluation Based On Improved CRITIC-Cloud Model

In recent years,with the continuous progress of industrialization and urbanization,environmental problems such as air pollution,water pollution and domestic garbage pollution have become increasingly prominent,which has seriously affected the sustainable development of social economy.The construction of ecological civilization is an inevitable choice for the sustainable development of the Chinese nation.Promoting the construction of ecological civilization and coordinating social and economic development requires scientific and effective assessment of regional ecological security.It has gradually become a hot topic in the academic world.This paper takes Anhui Province as the research object.Based on the PSR conceptual model,this paper combines the induction synthesis method,the frequency statistics method and the expert consultation method to screen the key influencing factors of regional ecological security,and determines the comprehensive evaluation index system.This paper uses the objective weighting method,improved CRITIC,to determine the weight of each indicator,which can solve the correlation between evaluation indicators.The cloud model is used to measure the degree of membership of Anhui Province's ecological security at different levels,to solve the problem of ambiguity and randomness in the evaluation process.According to the principle of maximum membership,the ecological security levels of Anhui Province from 2005 to 2017 were determined.Based on the evaluation results,Orign9.0 was used to draw the ecological security and pressure,state and response trends of Anhui Province,and to analyze the temporal evolution characteristics.The spatial distribution map of ecological security in Anhui Province was drawn by ArcGIS 10.2.In order to reveal the spatial evolution characteristics of ecological security conditions in Anhui Province,spatial auto-correlation analysis was carried out by Geodal.0.6.Meanwhile,maps of Moran scatter plots and LISA agglomeration were generated in this course to show the spatial changes.The research shows that:(1)From the perspective of the influence of each indicator,"the sulfur dioxide emissions per 10,000 yuan of GDP","industrial distribution density" and "the whole society's electricity intensity" have a greater impact on regional ecological security pressures."Per capita net income of households","per capita GDP" and "public toilets per 10,000 people" have a greater impact on regional ecological security state."Per capita afforestation area","the harmless treatment rate of domestic garbage"and "R&D expenditure as a share of GDP" have a greater impact on regional ecological security response.(2)From the perspective of the temporal evolution of ecological security in Anhui Province,the ecological security level of Anhui Province showed a trend of good volatility,from risk to good level,and the overall situation improved.(3)From the perspective of the ecological security spatial evolution in Anhui Province,the spatial distribution of ecological security in Anhui Province is uneven,and there are obvious spatial agglomeration characteristics.Except for a slight decline in the ecological security of Suzhou and Lu'an,most of the other areas have improved to varying degrees.The ecological security in central Anhui and southern Anhui is obviously better than that in northern Anhui,and the ecological security situation in southern Anhui has changed a lot.Finally,in view of the current situation of ecological security in Anhui Province,suggestions for ecological security management in Anhui Province were proposed from four aspects:adjusting industrial structure,tackling pollution prevention and control,increasing public investment,and improving the ecological awareness of the whole people.Figure 23 Table 15 Reference 99...